Gregory P. Melcher, MD
Infectious Disease Physician · San Francisco, CA
Gregory P. Melcher, MD is an infectious disease physician with a practice address in San Francisco, California, and NPI 1508846387, issued on Jan 18, 2006. Check the license (California 00G869540, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory P. Melcher
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 00G869540 CA
Self-reported in NPPES; status is on the state search - Practice location
- 518A Castro St, San Francisco, CA 94114
- Phone
- (415) 552-2814
- Enumerated
- Jan 18, 2006
- Record last updated
- Jul 5, 2022
- Fax
- (415) 552-2909
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 1,119 in California → Look up another NPI →
Also registered at 518A Castro St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emanuel Vergis, MDInternal Medicine Physician1962478495
Verify Gregory P. Melcher in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 00G869540Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average infectious disease physician in 2024
22 Medicare Part D claims for 17 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
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.
Gregory P. Melcher among 1,119 infectious disease physician records in California
Gregory P. Melcher, MD is one of 1,119 infectious disease 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 4% of them.
- NPI issued2006 · 4% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2022 · 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 207RI0200X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in California
There are 1,119 infectious disease physician records in California.
All 1,119 in California → Every provider in San Francisco → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Lisa DanzigSan Francisco, CA 941141497489629
- Daniel Goodman, M.D.San Francisco, CA 941141487765913
- Kathleen Jordan, M.D.San Francisco, CA 941141679630685
- David Busch, M.D.San Francisco, CA 941151942343975
- Andrew FaulkSan Francisco, CA 941151598224222
- Shelley Gordon, M.D.San Francisco, CA 941151841334521
- Erin Hsu, M.D.San Francisco, CA 941151366481509
- John Nienow, MDSan Francisco, CA 941151861472649
Common questions
What is Gregory P. Melcher, MD's NPI number?
Gregory P. Melcher, MD's National Provider Identifier (NPI) is 1508846387, issued on Jan 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gregory P. Melcher, MD located?
The NPPES record lists a practice address at 518A Castro St, San Francisco, CA, 94114. Phone: (415) 552-2814. Providers update this record themselves, so call before visiting.
How can I verify Gregory P. Melcher, MD's license?
NPPES lists California license number 00G869540, 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 Gregory P. Melcher, MD prescribe under Medicare Part D?
In 2024, Gregory P. Melcher, MD had 22 Medicare Part D claims for 17 beneficiaries; the average among infectious disease physician prescribers was 689. 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.