James R. Stewart, M.D.
Internal Medicine Physician · Alhambra, CA
James R. Stewart, M.D. is an internal medicine physician with a practice address in Alhambra, California, and NPI 1689758294, issued on Oct 24, 2006. Check the license (California A34030, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- James R. Stewart
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A34030 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1024 S Garfield Ave, Alhambra, CA 91801
- Phone
- (626) 289-5181
- Enumerated
- Oct 24, 2006
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (626) 458-8051
- Medicare enrollment
- Enrolled (PECOS I20101202001262); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 1024 S Garfield Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dick Chuang, PHYSICIAN ASSISTANTMedical Physician Assistant1588752349
- Anita Mercado, M.D.Family Medicine Physician1912089970
- John Stewart, M.D.Family Medicine Physician1417031022
- Tiffany StewartFamily Medicine Physician1982285441
- Sonya Tang, PAMedical Physician Assistant1013461698
Verify James R. Stewart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A34030Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.6 times the Medicare Part D claims of the average internal medicine physician in 2024
8,293 Medicare Part D claims for 464 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 411 claims were for opioids.
Most prescribed
- Levothyroxine Sodium310 claims
- Losartan Potassium266 claims
- Amlodipine Besylate246 claims
- Furosemide233 claims
- Atorvastatin Calcium214 claims
- Gabapentin209 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 practice group's MIPS final score for 2023 (Medicare payment program): 96 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,150.96
47 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 50,334 providers of this specialty with any payment received $1,303.06 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 one group practice
- Stewart And Stewart A Medical CorporationAlhambra, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
James R. Stewart among 17,696 internal medicine physician records in California
James R. Stewart, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1977 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
41 internal medicine physician records list a practice address in Alhambra
They are 41 of the 1,802 NPPES records with a practice address in Alhambra, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Alhambra → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Robert Chan, MDAlhambra, CA 918011508826488
- Alexander Chan, MDAlhambra, CA 918011467413666
- Joyce Chang, M.D.Alhambra, CA 918011952357600
- Max Chiou, MDAlhambra, CA 918011316963051
- Jin Hong, M.D.Alhambra, CA 918011972516441
- Thein Htay, M.D.Alhambra, CA 918011861594228
- Nu Khin, M.D.Alhambra, CA 918011881655199
- Eddie Lam, M.D.Alhambra, CA 918011518969971
Common questions
What is James R. Stewart, M.D.'s NPI number?
James R. Stewart, M.D.'s National Provider Identifier (NPI) is 1689758294, issued on Oct 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is James R. Stewart, M.D. located?
The NPPES record lists a practice address at 1024 S Garfield Ave, Alhambra, CA, 91801. Phone: (626) 289-5181. Providers update this record themselves, so call before visiting.
How can I verify James R. Stewart, M.D.'s license?
NPPES lists California license number A34030, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does James R. Stewart, M.D. prescribe under Medicare Part D?
In 2024, James R. Stewart, M.D. had 8,293 Medicare Part D claims for 464 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is James R. Stewart, M.D.'s MIPS final score?
The 2023 MIPS final score is 96 of 100, reported for the practice group. 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.