Arroyo Nephrology Associates
NPI 1033490453 · Nephrology Physician · Pasadena, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
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)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
- 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.