Dr. Nathan Hammel , MD
Orthopaedic Surgery โข Encinitas, CA
332 Santa Fe Dr Ste 110
Encinitas, CA 920245143
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. Nathan Hammel is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on November 20, 2006; this date does not establish years in practice.
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Published CMS data list 2,051 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:
- J7318 โ Hyaluronan or derivative, durolane, for intra-articular injection, 1 mg: 1,140 service units.
- J3301 โ Injection, triamcinolone acetonide, not otherwise specified, 10 mg: 438 service units.
- 99213 โ Established patient outpatient office visit: 139 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 13 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 14 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:
- Celecoxib โ 14 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 the full table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 60% of clinicians listed under Orthopaedic Surgery in California (2024, 1,037 clinicians with data). Median for this group: 1,177. Middle half: 310 to 3,300.
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 1,060 in 2020 to 2,051 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
332 Santa Fe Dr Ste 110
Encinitas, CA 920245143
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 5 distinct additional practice-address records in Carlsbad, CA; Encinitas, CA; San Diego, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: San Dieguito Orthopedic Medical Center P C. 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
Jefferson Medical College Of Thomas Jefferson University
2006
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
188 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 $79,805 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 $60,802 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
14 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
$702 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: $37.01 across 2 records.
By nature of payment
- Food and Beverage: $37.01 across 2 records.
Reporting-company totals
- ACUMED LLC: $22.75 across 1 record.
- Stryker Corporation: $14.26 across 1 record.
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
20 years (graduated 2006)
CMS Doctors and Clinicians data list 2006 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
2006
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. Hammel 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. Hammel 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 Encinitas and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 60% of clinicians listed under Orthopaedic Surgery in California (2024, 1,037 clinicians with data). Median for this group: 1,177. Middle half: 310 to 3,300.
Too few clinicians listed under Orthopaedic Surgery in Encinitas have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
Close to the middle for clinicians listed under Orthopaedic Surgery in California (2024, 1,037 clinicians with data). Median for this group: $92,613. Middle half: $32,551 to $209,320.
Too few clinicians listed under Orthopaedic Surgery in Encinitas have Medicare Part B data for 2024 to compare.
Paid by Medicare
Close to the middle for clinicians listed under Orthopaedic Surgery in California (2024, 1,037 clinicians with data). Median for this group: $69,737. Middle half: $24,028 to $159,045.
Too few clinicians listed under Orthopaedic Surgery in Encinitas have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Fewer Part D prescriptions than 90% of clinicians listed under Orthopaedic Surgery in California (2024, 1,131 clinicians with data). Median for this group: 139. Middle half: 45 to 347.
Too few clinicians listed under Orthopaedic Surgery in Encinitas have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 60% of clinicians listed under Orthopaedic Surgery in California (2024, 1,131 clinicians with data). Median for this group: $1,211. Middle half: $355 to $3,502.
Too few clinicians listed under Orthopaedic Surgery in Encinitas have Medicare Part D data for 2024 to compare.
13 active clinicians are listed under Orthopaedic Surgery with a practice address in Encinitas, CA (2,281 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Encinitas
7.7% of these 13 clinicians have the CMS telehealth indicator.
53.8% of these 13 clinicians are listed by CMS as accepting Medicare assignment.
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 increased 93% from 1,060 in 2020 to 2,051 in 2024.
- 2020: 1,060
- 2021: 1,437
- 2022: 1,363
- 2023: 835
- 2024: 2,051
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Medicare-allowed amount
Medicare-allowed amount increased 73% from $46,209 in 2020 to $79,805 in 2024.
- 2020: $46,209
- 2021: $64,987
- 2022: $88,721
- 2023: $100,169
- 2024: $79,805
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Paid by Medicare
Paid by Medicare increased 81% from $33,675 in 2020 to $60,802 in 2024.
- 2020: $33,675
- 2021: $48,548
- 2022: $67,244
- 2023: $76,172
- 2024: $60,802
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 90% from 143 in 2020 to 14 in 2024.
- 2020: 143
- 2021: 88
- 2022: 43
- 2023: 38
- 2024: 14
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30-day fills
30-day fills decreased 91% from 156 in 2020 to 14 in 2024.
- 2020: 156
- 2021: 90
- 2022: 43
- 2023: 38
- 2024: 14
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Part D drug cost
Part D drug cost decreased 74% from $2,659 in 2020 to $702 in 2024.
- 2020: $2,659
- 2021: $1,413
- 2022: $556
- 2023: $313
- 2024: $702
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $191.70 in 2021 to $37.01 in 2025.
- 2021: $191.70
- 2022: $182.06
- 2023: $366.58
- 2024: $186.48
- 2025: $37.01
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): fewer than 11 records totaling $37.01.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ACUMED LLC |
Food and Beverage
In-kind items and services
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Acumed | General | $22.75 |
| Stryker Corporation |
Food and Beverage
In-kind items and services
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โ | General | $14.26 |
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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J7318
Hyaluronan or derivative, durolane, for intra-articular injection, 1 mg
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1,140 | 13 | $55.59 | $6.55 |
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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
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438 | 37 | $5.15 | $0.98 |
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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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139 | 95 | $286.72 | $97.32 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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71 | 57 | $408.49 | $136.75 |
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20610
Aspiration and/or injection of fluid from large joint
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66 | 48 | $259.53 | $75.17 |
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73564
X-ray of knee, 4 or more views
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41 | 33 | $159.47 | $53.73 |
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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
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41 | 41 | $357.18 | $118.56 |
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73560
X-ray of knee, 1-2 views
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36 | 16 | $115.65 | $38.89 |
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27447
Replacement of knee joint, both sides of knee
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21 | 20 | $4334.10 | $1376.38 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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19 | 19 | $533.14 | $176.81 |
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73502
X-ray of hip, 2-3 views
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15 | 15 | $161.71 | $53.97 |
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73565
X-ray of both knees while standing
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13 | 13 | $135.85 | $45.49 |
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20985
Computer-assisted surgery for muscle and bone procedure
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11 | 11 | $434.42 | $143.85 |
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 |
|---|---|---|---|---|---|
| Celecoxib | Celecoxib | 14 | 420 | $701.73 | 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
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20171121001667
CA
8527284306
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
San Dieguito Orthopedic Medical Center P C
332 Santa Fe Dr, Encinitas, CA 920245143
Phone: 7609436700
Secondary Practice Locations
2451a Impala Dr
Carlsbad, CA 920107227
Phone: 7609182322
332 Santa Fe Dr Ste 120
Encinitas, CA 920245143
Phone: 7609424400
354 Santa Fe Dr
Encinitas, CA 920245142
Phone: 7606336501
320 Santa Fe Dr Ste Ll2
Encinitas, CA 920245140
Phone: 7606323900
7901 Frost St
San Diego, CA 921232701
Phone: 8589393400
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Orthopaedic Surgery - Hand Surgery
Doctor of Medicine (M.D.)
Physician Assistant - Medical
Physician Assistant
Orthopaedic Surgery - Hand Surgery
Doctor of Medicine (M.D.)
Physician Assistant - Surgical
Physician Assistant (Certified)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Orthopaedic Surgery (license number reported to NPPES: IN 01065216A)
NPI status registered as active in NPPES database
Registered at 332 SANTA FE DR STE 110, ENCINITAS, CA 920245143 (Tel: 7609436700)
Registered at 332 SANTA FE DRIVE SUITE 110, ENCINITAS, CA 92024
Recorded as NATHAN HAMMEL, MD
Orthopaedic Surgery (license number reported to NPPES: CA A139718)
NPI status registered as active in NPPES database
Registered at 34800 BOB WILSON DR, NMCSD, SAN DIEGO, CA 921341098 (Tel: 6195326000)
Registered at 4811 OLNEY ST, SAN DIEGO, CA 921093660
Recorded as NATHAN HAMMEL, MD
Orthopaedic Surgery (license number reported to NPPES: IN 01065216A)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Encinitas
- Dr. Luke Bremner, MD
- Dr. Ryan Meineke, MD
- Daniel Lepore, PA
- Dr. Patrick Padilla, MD
- Dr. Norah Harvey, MD
- Dr. Christopher Hajnik, MD
Mailing Address
332 Santa Fe Drive Suite 110
Encinitas, CA 92024