Dr. Gregory N Nelson , MD
Orthopaedic Surgery โข Bridgeton, MO
12349 De Paul Dr Ste 100
Bridgeton, MO 630442512
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Gregory Nelson is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on August 20, 2008; this date does not establish years in practice.
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Published CMS data list 359 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 20610 โ Aspiration and/or injection of fluid from large joint: 93 service units.
- 99213 โ Established patient outpatient office visit: 71 service units.
- 73030 โ X-ray of shoulder, minimum of 2 views: 35 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 10 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 622 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Oxycodone Hcl โ 165 prescription fills, including refills.
- Celecoxib โ 134 prescription fills, including refills.
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) โ 119 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 11 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 75% of clinicians listed under Orthopaedic Surgery in Missouri (2024, 278 clinicians with data). Median for this group: 1,210. Middle half: 405 to 3,120.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 610 in 2020 to 359 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
12349 De Paul Dr Ste 100
Bridgeton, MO 630442512
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Phoenix, AZ. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Orthopedic Associates Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Yale University School Of Medicine
2008
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
154 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $18,187 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $12,346 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
701 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$7,025 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $28,040.70 across 43 records.
By nature of payment
- Consulting Fee: $23,562.50 across 7 records.
- Travel and Lodging: $3,584.92 across 13 records.
- Food and Beverage: $893.28 across 23 records.
Reporting-company totals (3 largest of 10)
- Zimmer Biomet Holdings, Inc.: $23,631.53 across 30 records.
- FX Shoulder Solutions, Inc: $4,000.00 across 1 record.
- Stryker Corporation: $234.07 across 4 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
18 years (graduated 2008)
CMS Doctors and Clinicians data list 2008 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2008
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Nelson has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Nelson as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Bridgeton and Missouri
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 75% of clinicians listed under Orthopaedic Surgery in Missouri (2024, 278 clinicians with data). Median for this group: 1,210. Middle half: 405 to 3,120.
Too few clinicians listed under Orthopaedic Surgery in Bridgeton have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 80% of clinicians listed under Orthopaedic Surgery in Missouri (2024, 278 clinicians with data). Median for this group: $77,533. Middle half: $30,087 to $165,289.
Too few clinicians listed under Orthopaedic Surgery in Bridgeton have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 85% of clinicians listed under Orthopaedic Surgery in Missouri (2024, 278 clinicians with data). Median for this group: $57,918. Middle half: $21,847 to $124,941.
Too few clinicians listed under Orthopaedic Surgery in Bridgeton have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 70% of clinicians listed under Orthopaedic Surgery in Missouri (2024, 316 clinicians with data). Median for this group: 276. Middle half: 85 to 632.
Too few clinicians listed under Orthopaedic Surgery in Bridgeton have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 80% of clinicians listed under Orthopaedic Surgery in Missouri (2024, 316 clinicians with data). Median for this group: $1,930. Middle half: $530 to $5,474.
Too few clinicians listed under Orthopaedic Surgery in Bridgeton have Medicare Part D data for 2024 to compare.
9 active clinicians are listed under Orthopaedic Surgery with a practice address in Bridgeton, MO (514 in Missouri).
Addresses are self-reported to NPPES and may be out of date.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 41% from 610 in 2020 to 359 in 2024.
- 2020: 610
- 2021: 532
- 2022: 519
- 2023: 430
- 2024: 359
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Medicare-allowed amount
Medicare-allowed amount decreased 61% from $46,161 in 2020 to $18,187 in 2024.
- 2020: $46,161
- 2021: $60,884
- 2022: $77,962
- 2023: $38,544
- 2024: $18,187
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Paid by Medicare
Paid by Medicare decreased 63% from $33,600 in 2020 to $12,346 in 2024.
- 2020: $33,600
- 2021: $46,804
- 2022: $59,792
- 2023: $28,879
- 2024: $12,346
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 11% from 702 in 2020 to 622 in 2024.
- 2020: 702
- 2021: 893
- 2022: 957
- 2023: 734
- 2024: 622
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30-day fills
30-day fills varied from year to year: 745 in 2020 and 701 in 2024.
- 2020: 745
- 2021: 935
- 2022: 1,017
- 2023: 838
- 2024: 701
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Part D drug cost
Part D drug cost decreased 33% from $10,433 in 2020 to $7,025 in 2024.
- 2020: $10,433
- 2021: $49,360
- 2022: $53,260
- 2023: $16,666
- 2024: $7,025
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $25.28 in 2021 to $28,040.70 in 2025.
- 2021: $25.28
- 2022: $1,550.89
- 2023: $17,521.35
- 2024: $270.36
- 2025: $28,040.70
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 43 records totaling $28,040.70.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Zimmer Biomet Holdings, Inc. |
Consulting Fee
Cash or cash equivalent
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โ | General | $7,500.00 |
| Zimmer Biomet Holdings, Inc. |
Consulting Fee
Cash or cash equivalent
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โ | General | $4,250.00 |
| FX Shoulder Solutions, Inc |
Consulting Fee
Cash or cash equivalent
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โ | General | $4,000.00 |
| Zimmer Biomet Holdings, Inc. |
Consulting Fee
Cash or cash equivalent
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โ | General | $3,750.00 |
| Zimmer Biomet Holdings, Inc. |
Consulting Fee
Cash or cash equivalent
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โ | General | $3,187.50 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
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โ | General | $939.33 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
Oxford | General | $612.95 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
โ | General | $537.29 |
| Zimmer Biomet Holdings, Inc. |
Consulting Fee
Cash or cash equivalent
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โ | General | $500.00 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
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โ | General | $477.22 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
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โ | General | $385.00 |
| Zimmer Biomet Holdings, Inc. |
Consulting Fee
Cash or cash equivalent
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โ | General | $375.00 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
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โ | General | $271.59 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
BLUEPRINT PATIENT SPECIFIC INSTRUMENTATION | General | $163.75 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
โ | General | $137.34 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Oxford | General | $118.13 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
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Oxford | General | $66.67 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
Cash or cash equivalent
|
โ | General | $63.83 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $63.25 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
โ | General | $57.00 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
Cash or cash equivalent
|
โ | General | $56.97 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
โ | General | $53.00 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
|
Oxford | General | $44.45 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
โ | General | $35.00 |
| Zimmer Biomet Holdings, Inc. |
Travel and Lodging
In-kind items and services
|
Oxford | General | $35.00 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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20610
Aspiration and/or injection of fluid from large joint
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93 | 68 | $193.72 | $48.64 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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71 | 52 | $113.38 | $61.99 |
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73030
X-ray of shoulder, minimum of 2 views
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35 | 26 | $75.60 | $8.70 |
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73564
X-ray of knee, 4 or more views
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33 | 23 | $75.60 | $10.67 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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31 | 29 | $319.63 | $127.11 |
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73562
X-ray of knee, 3 views
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24 | 19 | $58.80 | $8.71 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
23 | 23 | $171.85 | $78.87 |
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73502
X-ray of hip, 2-3 views
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20 | 12 | $112.80 | $10.33 |
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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16 | 16 | $300.00 | $124.75 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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13 | 11 | $50.00 | $33.84 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 165 | 1,441 | $1,102.22 | 102 |
| Celecoxib | Celecoxib | 134 | 4,993 | $2,936.88 | 70 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 119 | 1,296 | $1,416.43 | 72 |
| Omeprazole | Omeprazole | 37 | 1,434 | $266.32 | 33 |
| Diclofenac Sodium | Diclofenac Sodium | 35 | 1,108 | $398.24 | 15 |
| Acetaminophen-Codeine | Acetaminophen With Codeine | 31 | 628 | $250.09 | 16 |
| Meloxicam | Meloxicam | 24 | 1,515 | $127.41 | 14 |
| Tramadol Hcl | Tramadol Hcl | 24 | 234 | $119.69 | 16 |
| Amoxicillin | Amoxicillin | 23 | 29 | $21.55 | 15 |
| Cefadroxil | Cefadroxil | 17 | 117 | $96.52 | 15 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 13 | 96 | $289.99 | โ |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-11-19NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
NUCC Taxonomy Code: 174400000X
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
NUCC Taxonomy Code: 207X00000X
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
NUCC Taxonomy Code: 207XS0114X
Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, adult reconstructive orthopaedic surgeons deal with reconstructive procedures such as joint arthroplasty (i.e., hip and knee), osteotomy, arthroscopy, soft-tissue reconstruction, and a variety of other adult reconstructive surgical procedures.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20170331000739
MO
0648406348
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Orthopedic Associates Llc
1050 Old Des Peres Rd, Saint Louis, MO 631311873
Phone: 3145690612
Secondary Practice Locations
18444 N 25th Ave, Ste 310
Phoenix, AZ 850231266
Phone: 6235375600
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physical Medicine & Rehabilitation
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Nurse Practitioner
Certified Nurse Practitioner
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant
Physician Assistant
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 12349 DE PAUL DR STE 100, BRIDGETON, MO 630442512 (Tel: 3142917900)
Registered at PO BOX 955534, SAINT LOUIS, MO 631955534
NPI status registered as active in NPPES database
Registered at 18444 N 25TH AVE, STE 310, PHOENIX, AZ 850231266 (Tel: 6235375600)
Registered at 925 CHESTNUT ST, 5TH FLOOR, PHILADELPHIA, PA 191074216 (Tel: 2673393500)
Recorded as GREGORY NELSON, M.D.
Specialist (license number reported to NPPES: AZ 49237)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Bridgeton
- Dr. Katherine Burns, MD
- Dr. Fallon Maylack, MD
- Dr. Crystel Knierim, MD
- Dr. Terry Weis, DO
- Dr. Frank Tull, MD
- Dr. William Schroer, MD
Mailing Address
Po Box 955534
Saint Louis, MO 631955534