David Nathanson
NPI 1013478676 · Internal Medicine Physician · Walnut Creek, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Nathanson is a Internal Medicine Physician provider in Walnut Creek, CA (NPI 1013478676).
Provider details
- NPI number
- 1013478676
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 19491 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 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 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 328 | 128 |
| Amlodipine Besylate | 223 | 85 |
| Losartan Potassium | 153 | 57 |
| Lisinopril | 145 | 53 |
| Levothyroxine Sodium | 144 | 47 |
| Fluticasone Propionate | 140 | 56 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-27
- Last updated
- 2022-10-24
- Certified
- 2022-10-24
Frequently asked questions
- What is David Nathanson's NPI number?
- David Nathanson's National Provider Identifier (NPI) is 1013478676, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Nathanson's specialty?
- David Nathanson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is David Nathanson located?
- David Nathanson's practice location on file with NPPES is 320 Lennon Ln, Walnut Creek, CA 94598-2419.
- What is David Nathanson's phone number?
- The practice phone number listed in the NPPES registry for David Nathanson is (925) 906-2000.
- Does David Nathanson accept Medicare?
- David Nathanson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Nathanson's NPI active?
- Yes — David Nathanson's NPI (1013478676) is active in the NPPES registry as of the last update on 2022-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.