Frederick Sommervil Watson, M.D.
Cardiovascular Disease Physician · San Mateo, CA
Frederick Sommervil Watson, M.D. is a cardiovascular disease physician with a practice address in San Mateo, California, and NPI 1568450104, issued on Oct 7, 2005. Check the license (California A48257, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Frederick Sommervil Watson
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License numbers
- A48257 CA
306537 NY
Self-reported in NPPES; status is on the state search - Practice location
- 50 S San Mateo Dr, San Mateo, CA 94401
- Phone
- (650) 652-8600
- Enumerated
- Oct 7, 2005
- Record last updated
- Oct 21, 2025
- Medicaid ID
- 00A482570 CA
- Medicare enrollment
- Enrolled (PECOS I20220412001879); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical Branch At Galveston, 1983
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 2,574 in California → Look up another NPI →
Also registered at 50 S San Mateo Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shelley Adams, MDObstetrics & Gynecology Physician1891801932
- Lois Balster, M.D.Pediatrics Physician1568578474
- Bruce Bern, M.D.Ophthalmology Physician1700954278
- Jeanne Beymer, MDPediatrics Physician1114913530
- Hayley Brown, MS, RN, FNP-CFamily Nurse Practitioner1518395169
- Stephen Buchner, MDPediatrics Physician1013938786
Verify Frederick Sommervil Watson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A48257Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
232 Medicare Part D claims for 104 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Eliquis25 claims
- Atorvastatin Calcium24 claims
- Ezetimibe20 claims
- Amlodipine Besylate17 claims
- Losartan Potassium17 claims
- Metoprolol Succinate13 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.
Bills Medicare through 2 group practices
- Our Lady OF Lourdes Memorial Hospital IncBinghamton, NY
- The Westchester Medical Practice PCCortlandt Manor, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Frederick Sommervil Watson among 2,574 cardiovascular disease physician records in California
Frederick Sommervil Watson, M.D. is one of 2,574 cardiovascular disease physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1983 · median 1999 among the 1,742 with a school on file
- Record last updated2025 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in California
There are 2,574 cardiovascular disease physician records in California.
All 2,574 in California → Every provider in San Mateo → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Jonathan Briskin, M.D.San Mateo, CA 944011417032376
- Jeffrey Guttas, M.D.San Mateo, CA 944011093726895
- David Kurzrock, M.D.San Mateo, CA 944011619988425
- Lawrence Lenhart, MDSan Mateo, CA 944011134210107
- Robert Zipkin, M.D.San Mateo, CA 944011558474718
- John Vankirk, M.D.San Mateo, CA 944021881843068
- Jacqueline Baras Shreibati, M.D.San Mateo, CA 944031780997064
- Aparna Bhagavat, M.D.San Mateo, CA 944031144254806
Common questions
What is Frederick Sommervil Watson, M.D.'s NPI number?
Frederick Sommervil Watson, M.D.'s National Provider Identifier (NPI) is 1568450104, issued on Oct 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Frederick Sommervil Watson, M.D. located?
The NPPES record lists a practice address at 50 S San Mateo Dr, San Mateo, CA, 94401. Phone: (650) 652-8600. Providers update this record themselves, so call before visiting.
How can I verify Frederick Sommervil Watson, M.D.'s license?
NPPES lists California license number A48257, 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 Frederick Sommervil Watson, M.D. prescribe under Medicare Part D?
In 2024, Frederick Sommervil Watson, M.D. had 232 Medicare Part D claims for 104 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. Part D covers Medicare prescriptions only.
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.