Charles Landefeld, M.D.
NPI 1962440941 · Internal Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Landefeld, M.D. is a Internal Medicine Physician provider in San Francisco, CA (NPI 1962440941).
Provider details
- NPI number
- 1962440941
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G43841 (CA)
Specialties & taxonomies
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-03
- Last updated
- 2025-09-11
Frequently asked questions
- What is Charles Landefeld's NPI number?
- Charles Landefeld's National Provider Identifier (NPI) is 1962440941, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Landefeld's specialty?
- Charles Landefeld is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Landefeld located?
- Charles Landefeld's practice location on file with NPPES is 2501 Ocean Ave, San Francisco, CA 94143-0001.
- What is Charles Landefeld's phone number?
- The practice phone number listed in the NPPES registry for Charles Landefeld is (415) 750-6625.
- Does Charles Landefeld accept Medicare?
- Charles Landefeld is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Landefeld's NPI active?
- Yes — Charles Landefeld's NPI (1962440941) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.