MRS. IRENE KAJIYA NAGEL P.A.-C
NPI 1255447496
Physician Assistant - Surgical in Fountain Valley, CA

Q: What is Irene Nagel's NPI number?

The NPI number for Irene Nagel is 1255447496. It was assigned to this individual provider in the NPPES registry on August 21, 2006. The provider is also known as Irene Aiko Kajiya P.A.-C.

Q: What is Irene Nagel's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.

Q: When was this NPI record last updated?

The NPPES record for Irene Nagel was last updated on June 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 21, 2006PECOS Enrolled

76.74/100

CMS Quality Rating

18035 BROOKHURST ST., SUITE 1300, FOUNTAIN VALLEY, CA 92708(657) 241-9440(714) 665-4601 Get Directions Write a Review

NPPES record last updated: June 27, 2025. Verified against the NPPES registry weekly; last sync: September 27, 2026.

Record update history: Jun 27, 2025, Mar 3, 2023, Mar 17, 2016 (3 updates tracked since 2016).

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About Mrs. Irene Kajiya Nagel P.a.-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MRS. IRENE KAJIYA NAGEL P.A.-C (NPI 1255447496) is an individual surgical provider in Fountain Valley, California, licensed in California (PA 15487) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in Corvallis.

NPPES Registry Identity

NPI1255447496

Entity TypeIndividualFemale

Primary Taxonomy363AS0400X

Provider Legal NameMRS. IRENE KAJIYA NAGELCredential: P.A.-C

Location Address18035 BROOKHURST ST., SUITE 1300Fountain Valley, CA 92708

Mailing Address18035 Brookhurst St., Suite 1300Fountain Valley, CA 92708 · (657) 241-9440 · Fax (714) 665-4601

Phone(657) 241-9440

Fax(714) 665-4601

Sole ProprietorNo

Enumeration DateAugust 21, 2006

Last NPPES UpdateJune 27, 20253 updates tracked since enumeration

NPPES CertifiedJune 27, 2025

✔ NPI 1255447496 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · SurgicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AS0400X

License✔ Licensed in CA · PA 15487

Also ListedPhysician AssistantTaxonomy 363A00000X · License PA225076 (OR)

18035 BROOKHURST ST., SUITE 1300, Fountain Valley, CA 92708

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Other Names 1

Former Name (1)Irene Aiko Kajiya P.a.-c

Secondary Practice Location 1

Location 13640 NW Samaritan Dr Ste 120Corvallis, OR 97330-3738 · Phone (541) 768-5223

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BridgeSpan Health Company, Moda Health Plan, Inc., Providence Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mrs. Irene Kajiya Nagel P.a.-c is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.74/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

80.94

Promoting Interoperability

Improvement Activities

Cost

55.12

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Irene Nagel's NPI number?

The NPI number for Irene Nagel is 1255447496. It was assigned to this individual provider in the NPPES registry on August 21, 2006. The provider is also known as Irene Aiko Kajiya P.A.-C.

Where is Irene Nagel located?

Irene Nagel practices at 18035 Brookhurst St., Suite 1300, Fountain Valley, CA 92708. The listed phone number is (657) 241-9440.

What is Irene Nagel's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.

Is Irene Nagel enrolled in Medicare?

Yes. Irene Nagel is registered in the Medicare PECOS enrollment system.

What insurance does Irene Nagel accept?

Health plans from BridgeSpan Health Company, Moda Health Plan, Inc., Providence Health Plan and Regence BlueCross BlueShield of Oregon list Irene Nagel as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Irene Nagel was last updated on June 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.