Douglas A. Corley, MD
Gastroenterology Physician · San Francisco, CA
Douglas A. Corley, MD is a gastroenterology physician with a practice address in San Francisco, California, and NPI 1598843138, issued on Nov 1, 2006. Check the license (California G80823, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Douglas A. Corley
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- G80823 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2200 Ofarrell St, San Francisco, CA 94115
- Phone
- (415) 833-2000
- Enumerated
- Nov 1, 2006
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 00G808230 CA
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 2,140 in California → Look up another NPI →
Also registered at 2200 Ofarrell St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Bryan Andrews, MDAnesthesiology Physician1609954239
Verify Douglas A. Corley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G80823Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average gastroenterology physician in 2024
166 Medicare Part D claims for 39 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Mesalamine23 claims
- Ondansetron Hcl22 claims
- Omeprazole18 claims
- Amitriptyline Hcl12 claims
- Azathioprine11 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.
Douglas A. Corley among 2,140 gastroenterology physician records in California
Douglas A. Corley, MD is one of 2,140 gastroenterology 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 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 48% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2021 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in California
There are 2,140 gastroenterology physician records in California.
All 2,140 in California → Every provider in San Francisco → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Edward Doo, MDSan Francisco, CA 941151295837243
- Yao Heng, MDSan Francisco, CA 941151225116825
- Steven Jacobsohn, M.D.San Francisco, CA 941151639104151
- Wolfgang Korn, MDSan Francisco, CA 941151235187055
- Uma Mahadevan, MDSan Francisco, CA 941151851355283
- Jane Melnick, MDSan Francisco, CA 941151124049879
- Aristotle Mendiola, M.D.San Francisco, CA 941151871518266
- Gerald Roberts, M.D.San Francisco, CA 941151982670220
Common questions
What is Douglas A. Corley, MD's NPI number?
Douglas A. Corley, MD's National Provider Identifier (NPI) is 1598843138, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Douglas A. Corley, MD located?
The NPPES record lists a practice address at 2200 Ofarrell St, San Francisco, CA, 94115. Phone: (415) 833-2000. Providers update this record themselves, so call before visiting.
How can I verify Douglas A. Corley, MD's license?
NPPES lists California license number G80823, 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 Douglas A. Corley, MD prescribe under Medicare Part D?
In 2024, Douglas A. Corley, MD had 166 Medicare Part D claims for 39 beneficiaries; the average among gastroenterology physician prescribers was 811. 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.