Gary Birnbaum MD Prof Corp
NPI 1255807152 · Family Medicine Physician · Mill Valley, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Birnbaum MD Prof Corp is a Family Medicine Physician organization in Mill Valley, CA (NPI 1255807152).
Provider details
- NPI number
- 1255807152
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- David Harnden, Administrative Manager(415) 648-2021
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-10-17
- Last updated
- 2018-10-17
Frequently asked questions
- What is Gary Birnbaum MD Prof Corp's NPI number?
- Gary Birnbaum MD Prof Corp's National Provider Identifier (NPI) is 1255807152, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Gary Birnbaum MD Prof Corp?
- Gary Birnbaum MD Prof Corp is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gary Birnbaum MD Prof Corp located?
- Gary Birnbaum MD Prof Corp's practice location on file with NPPES is 97 Vista Del Sol, Mill Valley, CA 94941-4920.
- What is Gary Birnbaum MD Prof Corp's phone number?
- The practice phone number listed in the NPPES registry for Gary Birnbaum MD Prof Corp is (415) 350-0639.
- Does Gary Birnbaum MD Prof Corp accept Medicare?
- Gary Birnbaum MD Prof Corp is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Gary Birnbaum MD Prof Corp?
- The authorized official listed on Gary Birnbaum MD Prof Corp's NPPES record is David Harnden, Administrative Manager. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Gary Birnbaum MD Prof Corp's NPI active?
- Yes — Gary Birnbaum MD Prof Corp's NPI (1255807152) is active in the NPPES registry as of the last update on 2018-10-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.