Diane E. Weissman, M.D.
Family Medicine Physician · Napa, CA
Diane E. Weissman, M.D. is a family medicine physician with a practice address in Napa, California, and NPI 1689668048, issued on Aug 31, 2005. Check the license (California A72337, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Diane E. Weissman
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- A72337 CA
45087 AZ
MD-23863 HI
Self-reported in NPPES; status is on the state search - Practice location
- 1141 Pear Tree LN, Napa, CA 94558
- Phone
- (707) 254-1770
- Enumerated
- Aug 31, 2005
- Record last updated
- Jan 26, 2026
- Medicaid ID
- 442217 AZ
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1141 Pear Tree LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Daniella Antalek, RNRegistered Nurse1265293385
- Irma Arellano, RDHDental Hygienist1528603610
- Carmen Arroyo, RNRegistered Nurse1700102225
- Ninad Athale, M.D.Family Medicine Physician1619124864
- Mayra Avina, FNPFamily Nurse Practitioner1336597004
- Bibiana Barrera MendezRegistered Nurse1043071178
Verify Diane E. Weissman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72337Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
89% fewer Medicare Part D claims than the average family medicine physician in 2024
386 Medicare Part D claims for 130 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Atorvastatin Calcium62 claims
- Losartan Potassium25 claims
- Amlodipine Besylate23 claims
- Levothyroxine Sodium13 claims
- Lisinopril12 claims
- Metformin Hcl12 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.
Diane E. Weissman among 17,133 family medicine physician records in California
Diane E. Weissman, 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 updated2026 · 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).
59 family medicine physician records list a practice address in Napa
They are 59 of the 3,583 NPPES records with a practice address in Napa, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Napa → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Aurelio Campos, MDNapa, CA 945581265446280
- Andrea Clarke, MDNapa, CA 945581598734709
- Alexandre De Moraes, M.D.Napa, CA 945581942284831
- Benjamin Jewell, MDNapa, CA 945581134134091
- Federico Leon, M.D.Napa, CA 945581659349173
- Maria Montenegro, M.D.Napa, CA 945581992719199
- Robert Moore, MDNapa, CA 945581538194899
- Michael Novak, MDNapa, CA 945581972501179
Common questions
What is Diane E. Weissman, M.D.'s NPI number?
Diane E. Weissman, M.D.'s National Provider Identifier (NPI) is 1689668048, issued on Aug 31, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Diane E. Weissman, M.D. located?
The NPPES record lists a practice address at 1141 Pear Tree LN, Napa, CA, 94558. Phone: (707) 254-1770. Providers update this record themselves, so call before visiting.
How can I verify Diane E. Weissman, M.D.'s license?
NPPES lists California license number A72337, 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 Diane E. Weissman, M.D. prescribe under Medicare Part D?
In 2024, Diane E. Weissman, M.D. had 386 Medicare Part D claims for 130 beneficiaries; 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.