Nathaniel James Stewart, M.D.
Orthopaedic Surgery Physician · Altoona, WI
Nathaniel James Stewart, M.D. is an orthopaedic surgery physician with a practice address in Altoona, Wisconsin, and NPI 1225064017, issued on Jun 23, 2006. Check the license (Wisconsin 39520, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Nathaniel James Stewart
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- 39520 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1200 Oakleaf Way Ste A, Altoona, WI 54720
- Phone
- (715) 832-1400
- Enumerated
- Jun 23, 2006
- Record last updated
- Jun 5, 2026
- Fax
- (715) 832-4187
- Medicaid ID
- 32400600 WI
- Medicare enrollment
- Enrolled (PECOS I20040619000068); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 1992
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 656 in Wisconsin → Look up another NPI →
Also registered at 1200 Oakleaf Way Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Benjamin Anderson, NPFamily Nurse Practitioner1437111739
- Troy Berg, M.D.Orthopaedic Surgery Physician1740216845
- John Berschback, M.D.Surgery of the Hand (Surgery) Physician1720244288
- Jennifer Brayton, PA, ATC, LATPhysician Assistant1518094408
- Alexandra Burke, PA-CPhysician Assistant1093640674
- Eric Caporusso, DPMPodiatrist1366445587
Verify Nathaniel James Stewart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 39520Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
22% more Medicare Part D claims than the average orthopaedic surgery physician in 2024
421 Medicare Part D claims for 247 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D.
Most prescribed
- Cephalexin299 claims
- Clindamycin Hcl38 claims
- Amoxicillin22 claims
- Diazepam16 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 10.8 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $7,337.37
12 payments; by number, the most common kind was food and beverage; the largest payer was Medical Device Business Services, Inc. The 15,003 providers of this specialty with any payment received $23,022.89 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Advantage Physical Therapy And Sports Rehab, LLCSpooner, WI
- Chippewa Valley Orthopedics And Sports Medicine Clinic SCAltoona, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathaniel James Stewart among 656 orthopaedic surgery physician records in Wisconsin
Nathaniel James Stewart, M.D. is one of 656 orthopaedic surgery physician records with a practice address in Wisconsin. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 41% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1992 · median 2006 among the 401 with a school on file
- Record last updated2026 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
8 orthopaedic surgery physician records list a practice address in Altoona
They are 8 of the 198 NPPES records with a practice address in Altoona, and 656 orthopaedic surgery physician records in Wisconsin.
All 656 in Wisconsin → Every provider in Altoona → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Troy Berg, M.D.Altoona, WI 547201740216845
- Brent Carlson, MDAltoona, WI 547201790938702
- Austin Crow, MDAltoona, WI 547201386809325
- Nathan Harris, M.D.Altoona, WI 547201043578461
- Mark McCarthy, MDAltoona, WI 547201427020627
- Jose Padilla, M.D.Altoona, WI 547201184660342
- Evan Peissig, M.D.Altoona, WI 547201457733495
- Douglas Auleta, MDEau Claire, WI 547031396724787
Common questions
What is Nathaniel James Stewart, M.D.'s NPI number?
Nathaniel James Stewart, M.D.'s National Provider Identifier (NPI) is 1225064017, issued on Jun 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nathaniel James Stewart, M.D. located?
The NPPES record lists a practice address at 1200 Oakleaf Way Ste A, Altoona, WI, 54720. Phone: (715) 832-1400. Providers update this record themselves, so call before visiting.
How can I verify Nathaniel James Stewart, M.D.'s license?
NPPES lists Wisconsin license number 39520, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nathaniel James Stewart, M.D. prescribe under Medicare Part D?
In 2024, Nathaniel James Stewart, M.D. had 421 Medicare Part D claims for 247 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
What is Nathaniel James Stewart, M.D.'s MIPS final score?
The 2023 MIPS final score is 10.8 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.