David Roy Gilliam, M.D.
Family Medicine Physician · Fairfield, CA
David Roy Gilliam, M.D. is a family medicine physician with a practice address in Fairfield, California, and NPI 1376526236, issued on Nov 23, 2005. Check the license (California G36497, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Roy Gilliam
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G36497 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1620 Pennsylvannia Ave, Fairfield, CA 94533
- Phone
- (707) 428-4878
- Enumerated
- Nov 23, 2005
- Record last updated
- Jun 27, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (707) 428-0806
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Verify David Roy Gilliam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G36497Check 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 family medicine physician in 2024
107 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Rosuvastatin Calcium12 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.
David Roy Gilliam among 17,133 family medicine physician records in California
David Roy Gilliam, M.D. is one of 17,133 family 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2014 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
67 family medicine physician records list a practice address in Fairfield
They are 67 of the 3,595 NPPES records with a practice address in Fairfield, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Fairfield → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Rebekah Ayodele, M.D.Fairfield, CA 945331114965258
- Ronald Chapman, MDFairfield, CA 945331629006333
- David Danzeisen, MDFairfield, CA 945331306924295
- Padma Dasari, M DFairfield, CA 945331730261488
- James Firman, M.D.Fairfield, CA 945331134164189
- Craig Gillespie, MDFairfield, CA 945331609885037
- Robert Landgraf, D.O.Fairfield, CA 945331821032970
- Michael Moshier, MDFairfield, CA 945331558459313
Common questions
What is David Roy Gilliam, M.D.'s NPI number?
David Roy Gilliam, M.D.'s National Provider Identifier (NPI) is 1376526236, issued on Nov 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is David Roy Gilliam, M.D. located?
The NPPES record lists a practice address at 1620 Pennsylvannia Ave, Fairfield, CA, 94533. Phone: (707) 428-4878. Providers update this record themselves, so call before visiting.
How can I verify David Roy Gilliam, M.D.'s license?
NPPES lists California license number G36497, 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 David Roy Gilliam, M.D. prescribe under Medicare Part D?
In 2024, David Roy Gilliam, M.D. had 107 Medicare Part D claims; the average among family medicine physician prescribers was 3,544. 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.