What is Arroyo Nephrology Associates's NPI number?

Arroyo Nephrology Associates's National Provider Identifier (NPI) is 1033490453, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What type of organization is Arroyo Nephrology Associates?

Arroyo Nephrology Associates is classified in the NPPES registry as Nephrology Physician (Allopathic & Osteopathic Physicians).

Where is Arroyo Nephrology Associates located?

Arroyo Nephrology Associates's practice location on file with NPPES is 301 S Fair Oaks Ave Ste 405, Pasadena, CA 91105-2562.

What is Arroyo Nephrology Associates's phone number?

The practice phone number listed in the NPPES registry for Arroyo Nephrology Associates is (626) 794-7075.

Does Arroyo Nephrology Associates accept Medicare?

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

Who is the authorized official for Arroyo Nephrology Associates?

The authorized official listed on Arroyo Nephrology Associates's NPPES record is Ashok Sunder Raj, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.

Is Arroyo Nephrology Associates's NPI active?

Yes — Arroyo Nephrology Associates's NPI (1033490453) is active in the NPPES registry as of the last update on 2026-03-06.

OrganizationActiveAccepts Medicare

Arroyo Nephrology Associates

NPI 1033490453 · Nephrology Physician · Pasadena, CA

Arroyo Nephrology Associates is a Nephrology Physician organization in Pasadena, CA (NPI 1033490453).

Provider details

NPI number: 1033490453
Entity type: Organization
Primary specialty: Nephrology PhysicianAllopathic & Osteopathic Physicians
Organization subpart: No
Authorized official: Ashok Sunder Raj, President(626) 794-7075
License: A41453 (CA)

Practice location

301 S Fair Oaks Ave Ste 405

Pasadena, CA 91105-2562

Phone: (626) 794-7075

Fax: (626) 404-7545

Street-level locationGet directions

More CA providers

Mailing address

301 S Fair Oaks Ave Ste 405

Pasadena, CA 91105-2562

Specialties & taxonomies

Nephrology PhysicianPrimary207RN0300XLicense A41453 (CA)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(82/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
15 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.

Enumerated: 2011-08-30
Last updated: 2026-03-06
Certified: 2026-03-06

Frequently asked questions

What is Arroyo Nephrology Associates's NPI number?: Arroyo Nephrology Associates's National Provider Identifier (NPI) is 1033490453, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What type of organization is Arroyo Nephrology Associates?: Arroyo Nephrology Associates is classified in the NPPES registry as Nephrology Physician (Allopathic & Osteopathic Physicians).
Where is Arroyo Nephrology Associates located?: Arroyo Nephrology Associates's practice location on file with NPPES is 301 S Fair Oaks Ave Ste 405, Pasadena, CA 91105-2562.
What is Arroyo Nephrology Associates's phone number?: The practice phone number listed in the NPPES registry for Arroyo Nephrology Associates is (626) 794-7075.
Does Arroyo Nephrology Associates accept Medicare?: Arroyo Nephrology Associates is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Who is the authorized official for Arroyo Nephrology Associates?: The authorized official listed on Arroyo Nephrology Associates's NPPES record is Ashok Sunder Raj, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
Is Arroyo Nephrology Associates's NPI active?: Yes — Arroyo Nephrology Associates's NPI (1033490453) is active in the NPPES registry as of the last update on 2026-03-06.

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

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions