Ruth Siew, M.D.
NPI 1255674479 · Pediatric Pulmonology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ruth Siew, M.D. is a Pediatric Pulmonology Physician provider in San Francisco, CA (NPI 1255674479).
Provider details
- NPI number
- 1255674479
- Entity type
- Individual
- Primary specialty
- Pediatric Pulmonology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A132946 (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
13 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
- 2013-04-05
- Last updated
- 2022-07-08
- Certified
- 2022-07-08
Frequently asked questions
- What is Ruth Siew's NPI number?
- Ruth Siew's National Provider Identifier (NPI) is 1255674479, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ruth Siew's specialty?
- Ruth Siew is listed in the NPPES registry with a primary specialty of Pediatric Pulmonology Physician (Allopathic & Osteopathic Physicians).
- Where is Ruth Siew located?
- Ruth Siew's practice location on file with NPPES is 1825 4th St Fl 6, San Francisco, CA 94143-2350.
- What is Ruth Siew's phone number?
- The practice phone number listed in the NPPES registry for Ruth Siew is (415) 353-7337.
- Does Ruth Siew accept Medicare?
- Ruth Siew is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ruth Siew's NPI active?
- Yes — Ruth Siew's NPI (1255674479) is active in the NPPES registry as of the last update on 2022-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.