Matthew H. Riley, D.O.
Internal Medicine Physician · San Francisco, CA
Matthew H. Riley, D.O. is an internal medicine physician with a practice address in San Francisco, California, and NPI 1922395490, issued on Jul 6, 2011. Check the license (California 20A13448, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Matthew H. Riley
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A13448 CA
Self-reported in NPPES; status is on the state search - Practice location
- 450 Stanyan St., San Francisco, CA 94117
- Phone
- (415) 750-5909
- Enumerated
- Jul 6, 2011
- Record last updated
- May 17, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (415) 750-5910
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 450 Stanyan St.
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Pamela Tien, PHARM.DPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1629359047
Verify Matthew H. Riley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A13448Check 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 internal medicine physician in 2024
327 Medicare Part D claims for 223 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Atorvastatin Calcium128 claims
- Lisinopril20 claims
- Losartan Potassium17 claims
- Metformin Hcl17 claims
- Eliquis13 claims
- Simvastatin11 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.
Matthew H. Riley among 17,696 internal medicine physician records in California
Matthew H. Riley, D.O. 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 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2016 · 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).
1,318 internal medicine physician records list a practice address in San Francisco
They are 1,318 of the 38,143 NPPES records with a practice address in San Francisco, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in San Francisco → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Pedro Aceves-Casillas, M.D.San Francisco, CA 941171144252396
- Charles Allison, M.D.San Francisco, CA 941171376541060
- Carl Bricca, D.O.San Francisco, CA 941171114925385
- Robert BrodySan Francisco, CA 941171801815600
- Kwok Chan, M.D.San Francisco, CA 941171063413714
- Diana Hilbert, M.D.San Francisco, CA 941171386642551
- William Kell, M.DSan Francisco, CA 941171528094547
- Kenneth Maybury, M.D.San Francisco, CA 941171295733459
Common questions
What is Matthew H. Riley, D.O.'s NPI number?
Matthew H. Riley, D.O.'s National Provider Identifier (NPI) is 1922395490, issued on Jul 6, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Matthew H. Riley, D.O. located?
The NPPES record lists a practice address at 450 Stanyan St., San Francisco, CA, 94117. Phone: (415) 750-5909. Providers update this record themselves, so call before visiting.
How can I verify Matthew H. Riley, D.O.'s license?
NPPES lists California license number 20A13448, 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 Matthew H. Riley, D.O. prescribe under Medicare Part D?
In 2024, Matthew H. Riley, D.O. had 327 Medicare Part D claims for 223 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.