Diane Weissman, M.D.
NPI 1689668048 · Family Medicine Physician · Napa, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Diane Weissman, M.D. is a Family Medicine Physician provider in Napa, CA (NPI 1689668048).
Provider details
- NPI number
- 1689668048
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 45087 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 62 | 31 |
| Losartan Potassium | 25 | 14 |
| Amlodipine Besylate | 23 | 16 |
| Levothyroxine Sodium | 13 | — |
| Lisinopril | 12 | — |
| Metformin Hcl | 12 | — |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-31
- Last updated
- 2026-01-26
- Certified
- 2026-01-26
Frequently asked questions
- What is Diane Weissman's NPI number?
- Diane Weissman's National Provider Identifier (NPI) is 1689668048, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Diane Weissman's specialty?
- Diane Weissman is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Diane Weissman located?
- Diane Weissman's practice location on file with NPPES is 1141 Pear Tree Ln, Napa, CA 94558-6484.
- What is Diane Weissman's phone number?
- The practice phone number listed in the NPPES registry for Diane Weissman is (707) 254-1770.
- Does Diane Weissman accept Medicare?
- Diane Weissman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Diane Weissman's NPI active?
- Yes — Diane Weissman's NPI (1689668048) is active in the NPPES registry as of the last update on 2026-01-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.