IndividualActive
Mary Margaret Knudson, MD
NPI 1912946674 · Surgery Physician · San Francisco, CA
Mary Margaret Knudson, MD is a Surgery Physician provider in San Francisco, CA (NPI 1912946674).
Provider details
- NPI number
- 1912946674
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- License
- G47446 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
1001 Potrero Avenue
Rm 3a37
San Francisco, CA 94110-3518
Phone: (415) 206-4634
Fax: (415) 206-5484
Street-level locationGet directions
Mailing address
Po Box 7464
San Francisco, CA 94120-7464
Registry dates
- Enumerated
- 2006-06-06
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary Margaret Knudson's NPI number?
- Mary Margaret Knudson's National Provider Identifier (NPI) is 1912946674, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Margaret Knudson's specialty?
- Mary Margaret Knudson is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Margaret Knudson located?
- Mary Margaret Knudson's practice location on file with NPPES is 1001 Potrero Avenue, San Francisco, CA 94110-3518.
- What is Mary Margaret Knudson's phone number?
- The practice phone number listed in the NPPES registry for Mary Margaret Knudson is (415) 206-4634.
- Is Mary Margaret Knudson's NPI active?
- Yes — Mary Margaret Knudson's NPI (1912946674) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.