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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MISS CINDY SIEUN AN AGPCNP-BC
NPI 1801579420
Nurse Practitioner in Fullerton, CA

Active since August 10, 2023PECOS EnrolledAccepts Medicare Assignment
100 N STATE COLLEGE BLVD STE H, FULLERTON, CA 92831(714) 824-6565(714) 930-7926 Get Directions Write a Review

NPPES record last updated: October 5, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 5, 2026, Jan 16, 2026, Feb 8, 2024 and 2 more (5 updates tracked since 2023).

About Miss Cindy Sieun An Agpcnp-bc NPPES

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

MISS CINDY SIEUN AN AGPCNP-BC (NPI 1801579420) is an individual nurse practitioner in Fullerton, California, licensed in California (95025982) and active in the NPI registry since August 2023. She is enrolled in Medicare PECOS and is a graduate of Other (2022).

NPPES Registry Identity

NPI1801579420
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameMISS CINDY SIEUN ANCredential: AGPCNP-BC
Location Address100 N STATE COLLEGE BLVD STE HFullerton, CA 92831-4236
Mailing Address9373 Hazard Way Ste 200San Diego, CA 92123-1226 · (858) 810-8000 · Fax (858) 268-1911
Phone(714) 824-6565
Fax(714) 930-7926
Sole ProprietorYes
Medical School CMSOtherGraduated 2022
Enumeration DateAugust 10, 2023
Last NPPES UpdateOctober 5, 20265 updates tracked since enumeration
NPPES CertifiedOctober 5, 2026
✔ NPI 1801579420 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in CA · 95025982
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedNurse Practitioner · GerontologyTaxonomy 363LG0600X · License 95025982 (CA)
100 N STATE COLLEGE BLVD STE H, Fullerton, CA 92831
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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

Miss Cindy Sieun An Agpcnp-bc 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 ID7113371261
PECOS Enrollment IDI20230925000364
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 Reassignments

3

Medicare enrollment records show Cindy An reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Algos Inc., A Medical Corporation
Same address
Pain Medicine
100 N STATE COLLEGE BLVD STE H
Fullerton, CA 92831
  • Reassigned Medicare billing, California enrollment
  • 109 clinicians in this Medicare group
NPI 1790361939 (714) 824-6565
Won K Yu MD Mph Inc
9.2 mi
Gastroenterology
17400 IRVINE BLVD STE F
Tustin, CA 92780
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1538334289 (714) 937-9400
Balboa Nephrology Medical Group, Inc.
84 mi
Nephrology
9373 HAZARD WAY STE 200
San Diego, CA 92123
  • Reassigned Medicare billing, California enrollment
  • 85 clinicians in this Medicare group
NPI 1316997505 (858) 810-8000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92831 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JUAN ANTONIO VALADEZ DO
Pain Medicine (Pain Medicine)
100 N STATE COLLEGE BLVD STE H
FULLERTON, CA 92831
Orange County (714) 824-6565
TORRENCE PUCK PA-C
Physician Assistant
100 N STATE COLLEGE BLVD STE H
FULLERTON, CA 92831
Orange County (714) 824-6565
MS. SHVETA JAIN M.D.
Anesthesiology (Pain Medicine)
100 N STATE COLLEGE BLVD STE H
FULLERTON, CA 92831
Orange County (323) 783-4892
MINNAH CHO MSN, FNP-C
Nurse Practitioner
100 N STATE COLLEGE BLVD STE H
FULLERTON, CA 92831
Orange County (714) 824-6565
ALGOS INC., A MEDICAL CORPORATION
Pain Medicine (Pain Medicine)
100 N STATE COLLEGE BLVD STE H
FULLERTON, CA 92831
Orange County (714) 824-6565
DR. HOVHANNES GHAZARYAN MD
Pain Medicine (Pain Medicine)
100 N STATE COLLEGE BLVD STE H
FULLERTON, CA 92831
Orange County (714) 824-6565

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 Cindy An's NPI number?

The NPI number for Cindy An is 1801579420. It was assigned to this individual provider in the NPPES registry on August 10, 2023.

Where is Cindy An located?

Cindy An practices at 100 N State College Blvd Ste H, Fullerton, CA 92831. The listed phone number is (714) 824-6565.

What is Cindy An's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Cindy An enrolled in Medicare?

Yes. Cindy An 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 organizations bill Medicare for Cindy An's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Cindy An reassigns Medicare benefits to 3 organizations: Algos Inc., A Medical Corporation (Fullerton, CA), Won K Yu MD Mph Inc (Tustin, CA) and Balboa Nephrology Medical Group, Inc. (San Diego, CA). Each 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 Cindy An'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 Cindy An was last updated on October 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 34 days 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.