Sowmya Arja, M.D.
Allergy & Immunology (Internal Medicine) Physician · San Francisco, CA
Sowmya Arja, M.D. is an allergy & immunology (internal medicine) physician with a practice address in San Francisco, California, and NPI 1215390166, issued on Mar 29, 2016. Check the license (California A167950, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sowmya Arja
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology (Internal Medicine) Physician 207RA0201X
- License number
- A167950 CA
Self-reported in NPPES; status is on the state search - Practice location
- 450 Sutter St Ste 1139, San Francisco, CA 94108
- Phone
- (415) 362-2614
- Enumerated
- Mar 29, 2016
- Record last updated
- Jan 4, 2023
- Fax
- (415) 362-2615
- Entity
- Type 1 · individual
8 nearest allergy & immunology (internal medicine) physician records → All 81 in California → Look up another NPI →
Also registered at 450 Sutter St Ste 1139
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wynde Vastine, CCC-SLPSpeech-Language Pathologist1356980791
Verify Sowmya Arja in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A167950Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
90% fewer Medicare Part D claims than the average allergy & immunology (internal medicine) physician in 2024
80 Medicare Part D claims for 50 beneficiaries, against an average of 789 among the 429 providers of this specialty who prescribed in Part D. Brand-name drugs were 33% of claims.
Most prescribed
- Breyna15 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): 100 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).
Sowmya Arja among 81 allergy & immunology (internal medicine) physician records in California
Sowmya Arja, M.D. is one of 81 allergy & immunology (internal medicine) physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 78% of them.
- NPI issued2016 · 78% of these records are older, 15% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RA0201X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Allergy & Immunology (Internal Medicine) Physician providers in California
There are 81 allergy & immunology (internal medicine) physician records in California.
All 81 in California → Every provider in San Francisco → Allergy & Immunology (Internal Medicine) Physician nationwide →
The 8 allergy & immunology (internal medicine) physician records with the nearest ZIP codes
- Roger Wang, D.O.San Francisco, CA 941081164522165
- Michael Main, MDSan Francisco, CA 941141649833005
- Von Nguyen, MDSan Francisco, CA 941151174815815
- Lynn Spitler, MDSan Francisco, CA 941171588867535
- Richard Wu, M.D.South San Francisco, CA 940801639532211
- Anna LangSan Francisco, CA 941431235556432
- Rose MonahanSan Francisco, CA 941431518461268
- Iris Otani, M.D.San Francisco, CA 941431285925990
Common questions
What is Sowmya Arja, M.D.'s NPI number?
Sowmya Arja, M.D.'s National Provider Identifier (NPI) is 1215390166, issued on Mar 29, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Sowmya Arja, M.D. located?
The NPPES record lists a practice address at 450 Sutter St Ste 1139, San Francisco, CA, 94108. Phone: (415) 362-2614. Providers update this record themselves, so call before visiting.
How can I verify Sowmya Arja, M.D.'s license?
NPPES lists California license number A167950, 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 Sowmya Arja, M.D. prescribe under Medicare Part D?
In 2024, Sowmya Arja, M.D. had 80 Medicare Part D claims for 50 beneficiaries; the average among allergy & immunology (internal medicine) physician prescribers was 789. Part D covers Medicare prescriptions only.
What is Sowmya Arja, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 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.