What is Ariya Chau's NPI number?

Ariya Chau's National Provider Identifier (NPI) is 1538569215, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Ariya Chau's specialty?

Ariya Chau is listed in the NPPES registry with a primary specialty of Pediatric Critical Care Medicine Physician (Allopathic & Osteopathic Physicians).

Where is Ariya Chau located?

Ariya Chau's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.

What is Ariya Chau's phone number?

The practice phone number listed in the NPPES registry for Ariya Chau is (650) 497-8000.

Does Ariya Chau accept Medicare?

Ariya Chau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Ariya Chau's NPI active?

Yes — Ariya Chau's NPI (1538569215) is active in the NPPES registry as of the last update on 2024-11-12.

IndividualActiveAccepts Medicare

Ariya Chau, M.D.

NPI 1538569215 · Pediatric Critical Care Medicine Physician · Palo Alto, CA

Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Ariya Chau, M.D. is a Pediatric Critical Care Medicine Physician provider in Palo Alto, CA (NPI 1538569215).

Provider details

NPI number: 1538569215
Entity type: Individual
Primary specialty: Pediatric Critical Care Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Female
Sole proprietor: No
License: A152035 (CA)

Specialties & taxonomies

Pediatric Critical Care Medicine PhysicianPrimary2080P0203XLicense A152035 (CA)
Allopathic & Osteopathic Physicians
Pediatrics Physician208000000XLicense A152035 (CA)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care

Profile Score

Detailed profile(84/100 index)

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
3 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

725 Welch Rd

Palo Alto, CA 94304-1601

Phone: (650) 497-8000

Street-level locationGet directions

More CA providers

Mailing address

725 Welch Rd

Palo Alto, CA 94304-1601

Additional practice locations (2)

4650 W Sunset Blvd
Los Angeles, CA 90027-6062
Phone: (323) 361-7411
505 S Main St Ste 525
Orange, CA 92868-4553
Phone: (714) 456-5631
Fax: (714) 285-0389

Enumerated: 2014-08-29
Last updated: 2024-11-12
Certified: 2024-11-12

Frequently asked questions

What is Ariya Chau's NPI number?: Ariya Chau's National Provider Identifier (NPI) is 1538569215, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Ariya Chau's specialty?: Ariya Chau is listed in the NPPES registry with a primary specialty of Pediatric Critical Care Medicine Physician (Allopathic & Osteopathic Physicians).
Where is Ariya Chau located?: Ariya Chau's practice location on file with NPPES is 725 Welch Rd, Palo Alto, CA 94304-1601.
What is Ariya Chau's phone number?: The practice phone number listed in the NPPES registry for Ariya Chau is (650) 497-8000.
Does Ariya Chau accept Medicare?: Ariya Chau is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Ariya Chau's NPI active?: Yes — Ariya Chau's NPI (1538569215) is active in the NPPES registry as of the last update on 2024-11-12.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.