John Culbertson, M.D.
NPI 1649219833 · Internal Medicine Physician · San Anselmo, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Culbertson, M.D. is a Internal Medicine Physician provider in San Anselmo, CA (NPI 1649219833).
Provider details
- NPI number
- 1649219833
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 23216 (AL)
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 · 105 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 704 | 254 |
| Losartan Potassium | 541 | 182 |
| Levothyroxine Sodium | 313 | 97 |
| Lisinopril | 311 | 103 |
| Amlodipine Besylate | 300 | 103 |
| Tamsulosin Hcl | 223 | 78 |
| Albuterol Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-05
- Last updated
- 2025-01-22
- Certified
- 2025-01-22
Frequently asked questions
- What is John Culbertson's NPI number?
- John Culbertson's National Provider Identifier (NPI) is 1649219833, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Culbertson's specialty?
- John Culbertson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Culbertson located?
- John Culbertson's practice location on file with NPPES is 895 Sir Francis Drake Blvd, San Anselmo, CA 94960-1916.
- What is John Culbertson's phone number?
- The practice phone number listed in the NPPES registry for John Culbertson is (415) 925-3617.
- Does John Culbertson accept Medicare?
- John Culbertson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Culbertson's NPI active?
- Yes — John Culbertson's NPI (1649219833) is active in the NPPES registry as of the last update on 2025-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.