DR. CHONGJIA CLAIRE CHEN MD
NPI 1285021618
Allergy & Immunology in Irvine, CA

Q: What is Chongjia Chen's NPI number?

The NPI number for Chongjia Chen is 1285021618. It was assigned to this individual provider in the NPPES registry on April 23, 2015.

Q: What is Chongjia Chen's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for Chongjia Chen was last updated on April 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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 April 23, 2015PECOS EnrolledAccepts Medicare Assignment

18 ENDEAVOR STE 208, IRVINE, CA 92618(949) 364-4361(949) 364-4361 Get Directions Write a Review

NPPES record last updated: April 1, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 1, 2026, May 8, 2019, Jul 23, 2018 (3 updates tracked since 2018).

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About Dr. Chongjia Claire Chen Md NPPES

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

DR. CHONGJIA CLAIRE CHEN MD (NPI 1285021618) is an individual allergy & immunology provider in Irvine, California, licensed in California (168418) and active in the NPI registry since April 2015. She is enrolled in Medicare PECOS and is a graduate of University Of Alabama School Of Medicine (2015).

NPPES Registry Identity

NPI1285021618

Entity TypeIndividualFemale

Primary Taxonomy207K00000X

Provider Legal NameDR. CHONGJIA CLAIRE CHENCredential: MD

Location Address18 ENDEAVOR STE 208Irvine, CA 92618-3181

Mailing Address26726 Crown Valley Pkwy Ste 200Mission Viejo, CA 92691-8003 · (949) 364-4361 · Fax (949) 364-4495

Phone(949) 364-4361

Fax(949) 364-4361

Sole ProprietorNo

Medical School CMSUniversity Of Alabama School Of MedicineGraduated 2015

Enumeration DateApril 23, 2015

Last NPPES UpdateApril 1, 20263 updates tracked since enumeration

NPPES CertifiedApril 1, 2026

✔ NPI 1285021618 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in CA · 168418

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

18 ENDEAVOR STE 208, Irvine, CA 92618

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Chongjia Claire Chen Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3577870070

PECOS Enrollment IDI20241218004384

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 Billing Reassignment

Medicare enrollment records show Chongjia Chen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Head And Neck Associates Of Orange County An Incorprate

9.1 mi

Specialist

26726 CROWN VALLEY PKWY, #200
Mission Viejo, CA 92691

Reassigned Medicare billing, California enrollment
18 clinicians in this Medicare group

NPI 1427093046 (949) 364-4361

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Chongjia Chen's NPI number?

The NPI number for Chongjia Chen is 1285021618. It was assigned to this individual provider in the NPPES registry on April 23, 2015.

Where is Chongjia Chen located?

Chongjia Chen practices at 18 Endeavor Ste 208, Irvine, CA 92618. The listed phone number is (949) 364-4361.

What is Chongjia Chen's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Is Chongjia Chen enrolled in Medicare?

Yes. Chongjia Chen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Chongjia Chen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Chongjia Chen reassigns Medicare benefits to Head And Neck Associates Of Orange County An Incorprate (Mission Viejo, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Chongjia Chen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Chongjia Chen was last updated on April 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.