Sarah Lynn Welsh, D.O.
Emergency Medicine Physician · Hayward, CA
Sarah Lynn Welsh, D.O. is an emergency medicine physician with a practice address in Hayward, California, and NPI 1174541866, issued on Jul 18, 2006. Check the license (California 20A9608, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sarah Lynn Welsh
- Credential
- D.O.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 20A9608 CA
DO1396 NV
Self-reported in NPPES; status is on the state search - Practice location
- 27200 Calaroga Ave, Hayward, CA 94545
- Phone
- (510) 264-4026
- Enumerated
- Jul 18, 2006
- Record last updated
- Dec 10, 2008 (not updated in 18 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 27200 Calaroga Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yahya Ahmed, M.D.Internal Medicine Physician1124283312
- Neelima Akkinapalli, P.A.Physician Assistant1154523496
- Matthew Andrews, NPAcute Care Nurse Practitioner1699645424
- Yalda Bahrani, FNP-CNurse Practitioner1770182388
- Manon Baze, PAPhysician Assistant1104849520
- John Bell, M.D.Internal Medicine Physician1720282932
Verify Sarah Lynn Welsh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9608Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average emergency medicine physician in 2024
146 Medicare Part D claims for 108 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 31 claims were for opioids.
Most prescribed
- Oxycodone-Acetaminophen18 claims
- Prednisone12 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): 91.6 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).
Sarah Lynn Welsh among 7,751 emergency medicine physician records in California
Sarah Lynn Welsh, D.O. is one of 7,751 emergency medicine physician records with a practice address in California. 81% 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2008 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
26 emergency medicine physician records list a practice address in Hayward
They are 26 of the 3,993 NPPES records with a practice address in Hayward, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Hayward → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Lyn Aborn, MDHayward, CA 945451891873659
- Eric Anderson, MDHayward, CA 945451417035262
- Robert Blum, MDHayward, CA 945451730267592
- Jeremy Graff, M.DHayward, CA 945451669491429
- Shao-I Huang, D.O.Hayward, CA 945451215031455
- Tan Nguyen, M.D.Hayward, CA 945451437173754
- Aaron Pessl, M.D.Hayward, CA 945451063425072
- Lisa Pinsky, MDHayward, CA 945451831277680
Common questions
What is Sarah Lynn Welsh, D.O.'s NPI number?
Sarah Lynn Welsh, D.O.'s National Provider Identifier (NPI) is 1174541866, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sarah Lynn Welsh, D.O. located?
The NPPES record lists a practice address at 27200 Calaroga Ave, Hayward, CA, 94545. Phone: (510) 264-4026. Providers update this record themselves, so call before visiting.
How can I verify Sarah Lynn Welsh, D.O.'s license?
NPPES lists California license number 20A9608, 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 Sarah Lynn Welsh, D.O. prescribe under Medicare Part D?
In 2024, Sarah Lynn Welsh, D.O. had 146 Medicare Part D claims for 108 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Sarah Lynn Welsh, D.O.'s MIPS final score?
The 2023 MIPS final score is 91.6 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.