Katherine Matthay, M.D.
NPI 1801822499 · Pediatrics Physician · San Francisco, CA
Katherine Matthay, M.D. is a Pediatrics Physician provider in San Francisco, CA (NPI 1801822499).
Provider details
- NPI number
- 1801822499
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- License
- G33559 (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
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
- 2006-06-24
- Last updated
- 2025-09-11
Frequently asked questions
- What is Katherine Matthay's NPI number?
- Katherine Matthay's National Provider Identifier (NPI) is 1801822499, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Matthay's specialty?
- Katherine Matthay is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Matthay located?
- Katherine Matthay's practice location on file with NPPES is 505 Parnassus Ave, San Francisco, CA 94143-2204.
- What is Katherine Matthay's phone number?
- The practice phone number listed in the NPPES registry for Katherine Matthay is (415) 476-3831.
- Is Katherine Matthay's NPI active?
- Yes — Katherine Matthay's NPI (1801822499) 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.