Maria Castellanos, M.D.
NPI 1881013795 · Pediatrics Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Castellanos, M.D. is a Pediatrics Physician provider in San Francisco, CA (NPI 1881013795).
Provider details
- NPI number
- 1881013795
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 3961 (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
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 747 52nd StOakland, CA 94609-1809Phone: (510) 428-3000
Registry dates
- Enumerated
- 2014-04-08
- Last updated
- 2024-08-14
- Certified
- 2024-08-14
Frequently asked questions
- What is Maria Castellanos's NPI number?
- Maria Castellanos's National Provider Identifier (NPI) is 1881013795, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Castellanos's specialty?
- Maria Castellanos is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Castellanos located?
- Maria Castellanos's practice location on file with NPPES is 550 16th St, San Francisco, CA 94143-2549.
- What is Maria Castellanos's phone number?
- The practice phone number listed in the NPPES registry for Maria Castellanos is (415) 476-3831.
- Does Maria Castellanos accept Medicare?
- Maria Castellanos is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Castellanos's NPI active?
- Yes — Maria Castellanos's NPI (1881013795) is active in the NPPES registry as of the last update on 2024-08-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.