Ruth Marlin, MD
NPI 1720114390 · Internal Medicine Physician · San Francisco, CA
Ruth Marlin, MD is a Internal Medicine Physician provider in San Francisco, CA (NPI 1720114390).
Provider details
- NPI number
- 1720114390
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- C39823 (CA)
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
19 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
- 2007-02-26
- Last updated
- 2010-08-30
Frequently asked questions
- What is Ruth Marlin's NPI number?
- Ruth Marlin's National Provider Identifier (NPI) is 1720114390, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruth Marlin's specialty?
- Ruth Marlin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ruth Marlin located?
- Ruth Marlin's practice location on file with NPPES is 450 Stanyan, San Francisco, CA 94117-2725.
- What is Ruth Marlin's phone number?
- The practice phone number listed in the NPPES registry for Ruth Marlin is (415) 750-5660.
- Is Ruth Marlin's NPI active?
- Yes — Ruth Marlin's NPI (1720114390) is active in the NPPES registry as of the last update on 2010-08-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.