Katherine Ryan, DO
NPI 1356729032 · Pediatric Hematology & Oncology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Ryan, DO is a Pediatric Hematology & Oncology Physician provider in Palo Alto, CA (NPI 1356729032).
Provider details
- NPI number
- 1356729032
- Entity type
- Individual
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- 20A21833 (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
11 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
- 2015-05-13
- Last updated
- 2024-04-16
- Certified
- 2024-04-16
Frequently asked questions
- What is Katherine Ryan's NPI number?
- Katherine Ryan's National Provider Identifier (NPI) is 1356729032, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Ryan's specialty?
- Katherine Ryan is listed in the NPPES registry with a primary specialty of Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Ryan located?
- Katherine Ryan's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
- What is Katherine Ryan's phone number?
- The practice phone number listed in the NPPES registry for Katherine Ryan is (650) 497-8000.
- Does Katherine Ryan accept Medicare?
- Katherine Ryan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Ryan's NPI active?
- Yes — Katherine Ryan's NPI (1356729032) is active in the NPPES registry as of the last update on 2024-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.