Robert Alvin Davis, MD
Specialist · Napa, CA
Robert Alvin Davis, MD is a specialist with a practice address in Napa, California, and NPI 1255440228, issued on Aug 30, 2006. Check the license (California G23265, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Robert Alvin Davis
- Credential
- MD
- Primary taxonomy
- Specialist 174400000X
- License number
- G23265 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3443 Villa LN Ste 10, Napa, CA 94558
- Phone
- (707) 294-2203
- Enumerated
- Aug 30, 2006
- Record last updated
- Sep 11, 2025
- Fax
- (707) 252-9012
- Medicaid ID
- 00G232650 CA
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 3443 Villa LN Ste 10
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Diana Devera, D.O.Internal Medicine Physician1629399563
- Paul Laband, MDInternal Medicine Physician1427029040
- John Zimmermann, M.D.Specialist1558380154
Verify Robert Alvin Davis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license G23265Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average specialist in 2024
20 Medicare Part D claims, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Robert Alvin Davis among 5,749 specialist records in California
Robert Alvin Davis, MD is one of 5,749 specialist records with a practice address in California. 30% 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, 60% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2025 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in Napa → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- James Bird, M.D.Napa, CA 945581629067210
- George Lendaris, R.P.T.Napa, CA 945581639266133
- Robert Losey, M.D.Napa, CA 945581669496543
- Elizabeth Moffitt, M.D.Napa, CA 945581497779383
- George Monteverdi, M.D.Napa, CA 945581730362062
- Wyeth Pierce, D.P.T.Napa, CA 945581659448702
- Lisa ToftelyNapa, CA 945581346687688
- John Zimmermann, M.D.Napa, CA 945581558380154
Common questions
What is Robert Alvin Davis, MD's NPI number?
Robert Alvin Davis, MD's National Provider Identifier (NPI) is 1255440228, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Alvin Davis, MD located?
The NPPES record lists a practice address at 3443 Villa LN Ste 10, Napa, CA, 94558. Phone: (707) 294-2203. Providers update this record themselves, so call before visiting.
How can I verify Robert Alvin Davis, MD's license?
NPPES lists California license number G23265, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Robert Alvin Davis, MD prescribe under Medicare Part D?
In 2024, Robert Alvin Davis, MD had 20 Medicare Part D claims; the average among specialist prescribers was 1,380. 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.