Dr. Thomas Andrew Greenwald , MD
Orthopaedic Surgery • Ames, IA
1215 Duff Ave
Ames, IA 500103014
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. Thomas Greenwald is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on October 13, 2005; this date does not establish years in practice.
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Published CMS data list 3,488 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- J3301 — Injection, triamcinolone acetonide, not otherwise specified, 10 mg: 2,977 service units.
- 20610 — Aspiration and/or injection of fluid from large joint: 293 service units.
- 99214 — Established patient outpatient office visit: 124 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 7 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 18 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Cephalexin — 18 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – 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 · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Orthopaedic Surgery in Iowa (2024, 129 clinicians with data). Median for this group: 1,749. Middle half: 618 to 3,771.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,419 in 2020 to 3,488 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
1215 Duff Ave
Ames, IA 500103014
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Iowa, Rj & L Carver College Of Medicine
1987
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
243 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 – by Provider, 2024.
Medicare-allowed amount
About $65,609 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 – by Provider and Service, 2024.
Paid by Medicare
About $46,474 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 – by Provider and Service, 2024.
30-day fills
18 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
$52 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 – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $77.89 across 2 records.
By nature of payment
- Food and Beverage: $77.89 across 2 records.
Reporting-company totals
- Stryker Corporation: $53.24 across 1 record.
- DePuy Synthes Sales Inc.: $24.65 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
39 years (graduated 1987)
CMS Doctors and Clinicians data list 1987 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
2005
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.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
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, “Does your provider accept Medicare as full payment?”
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.
Can order Medicare-covered services
CMS lists Dr. Greenwald as eligible to order or refer durable medical equipment (DME) 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 Ames and Iowa
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Orthopaedic Surgery in Iowa (2024, 129 clinicians with data). Median for this group: 1,749. Middle half: 618 to 3,771.
Too few clinicians listed under Orthopaedic Surgery in Ames have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
Close to the middle for clinicians listed under Orthopaedic Surgery in Iowa (2024, 129 clinicians with data). Median for this group: $105,421. Middle half: $45,407 to $179,109.
Too few clinicians listed under Orthopaedic Surgery in Ames have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 60% of clinicians listed under Orthopaedic Surgery in Iowa (2024, 129 clinicians with data). Median for this group: $81,530. Middle half: $34,160 to $138,007.
Too few clinicians listed under Orthopaedic Surgery in Ames 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 Iowa (2024, 149 clinicians with data). Median for this group: 153. Middle half: 45 to 456.
Too few clinicians listed under Orthopaedic Surgery in Ames have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 90% of clinicians listed under Orthopaedic Surgery in Iowa (2024, 149 clinicians with data). Median for this group: $846. Middle half: $177 to $2,399.
Too few clinicians listed under Orthopaedic Surgery in Ames have Medicare Part D data for 2024 to compare.
8 active clinicians are listed under Orthopaedic Surgery with a practice address in Ames, IA (258 in Iowa).
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 increased 146% from 1,419 in 2020 to 3,488 in 2024.
- 2020: 1,419
- 2021: 2,206
- 2022: 3,977
- 2023: 4,052
- 2024: 3,488
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Medicare-allowed amount
Medicare-allowed amount decreased 20% from $82,358 in 2020 to $65,609 in 2024.
- 2020: $82,358
- 2021: $86,335
- 2022: $88,712
- 2023: $103,480
- 2024: $65,609
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Paid by Medicare
Paid by Medicare decreased 25% from $62,055 in 2020 to $46,474 in 2024.
- 2020: $62,055
- 2021: $65,293
- 2022: $64,912
- 2023: $77,603
- 2024: $46,474
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 91% from 201 in 2017 to 18 in 2024.
- 2017: 201
- 2018: 95
- 2019: 108
- 2020: 37
- 2024: 18
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30-day fills
30-day fills decreased 91% from 208 in 2017 to 18 in 2024.
- 2017: 208
- 2018: 95
- 2019: 109
- 2020: 37
- 2024: 18
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Part D drug cost
Part D drug cost decreased 98% from $2,171 in 2017 to $52 in 2024.
- 2017: $2,171
- 2018: $357
- 2019: $1,112
- 2020: $172
- 2024: $52
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $860.54 in 2021 to $77.89 in 2025.
- 2021: $860.54
- 2022: $2,822.08
- 2023: $2,975.56
- 2024: $1,190.85
- 2025: $77.89
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 · 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 – December 31, 2025): fewer than 11 records totaling $77.89.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Stryker Corporation |
Food and Beverage
In-kind items and services
|
— | General | $53.24 |
| DePuy Synthes Sales Inc. |
Food and Beverage
In-kind items and services
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ORTHOVISC | General | $24.65 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
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2,977 | 147 | $3.00 | $0.98 |
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20610
Aspiration and/or injection of fluid from large joint
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293 | 153 | $231.07 | $66.69 |
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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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124 | 108 | $202.47 | $117.67 |
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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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46 | 46 | $281.65 | $153.92 |
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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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18 | 18 | $137.00 | $83.78 |
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27447
Replacement of knee joint, both sides of knee
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16 | 15 | $3920.00 | $1143.73 |
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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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14 | 14 | $233.71 | $119.45 |
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 |
|---|---|---|---|---|---|
| Cephalexin | Cephalexin | 18 | 145 | $52.41 | 12 |
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: 2020-11-13NUCC 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.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSSources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
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 - Hand Surgery
Doctor of Osteopathic Medicine (D.O.)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Orthopaedic Surgery - Foot and Ankle Surgery
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Orthopaedic Surgery
Doctor of Medicine (M.D.)
Orthopaedic Surgery - Orthopaedic Surgery of the Spine
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated October 13, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Ames
- Dr. James Kohler, MD
- Dr. David Sneller, MD
- Dr. Bryan Warme, MD
- Dr. James Friederich, MD
- Dr. Michael Stefl, MD
- Dr. Peter Buck, MD
Mailing Address
1215 Duff Ave
Ames, IA 500103014
Phone: 5152394475