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ANGELA CLAIRE BIESEN D.O.
NPI 1699121491
Internal Medicine in Fountain Valley, CA

Active since May 11, 2016PECOS EnrolledAccepts Medicare Assignment
9900 TALBERT AVE STE 301, FOUNTAIN VALLEY, CA 92708(714) 965-2500(714) 965-2583 Get Directions Write a Review

NPPES record last updated: May 30, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 30, 2026, Mar 18, 2026, Mar 14, 2026 and 3 more (6 updates tracked since 2016).

About Angela Claire Biesen D.o. NPPES

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

ANGELA CLAIRE BIESEN D.O. (NPI 1699121491) is an individual internal medicine provider in Fountain Valley, California, licensed in California (20A16223) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS and is a graduate of Western University Of Health Sciences College Of Dental Med (2016).

NPPES Registry Identity

NPI1699121491
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameANGELA CLAIRE BIESENCredential: D.O.
Location Address9900 TALBERT AVE STE 301Fountain Valley, CA 92708-5153
Mailing Address9900 Talbert Ave Ste 200Fountain Valley, CA 92708-5153 · (714) 965-2500 · Fax (714) 965-2593
Phone(714) 965-2500
Fax(714) 965-2583
Sole ProprietorNo
Medical School CMSWestern University Of Health Sciences College Of Dental MedGraduated 2016
Enumeration DateMay 11, 2016
Last NPPES UpdateMay 30, 20266 updates tracked since enumeration
NPPES CertifiedMay 30, 2026
✔ NPI 1699121491 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in CA · 20A16223
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
9900 TALBERT AVE STE 301, Fountain Valley, CA 92708
Open in Google Maps ↗

Other Names 1

Former Name (1)Mrs. Angela Claire Whitaker Do

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Angela Claire Biesen D.o. 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 ID7810329604
PECOS Enrollment IDI20191115002763
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92708 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
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.

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 Angela Biesen's NPI number?

The NPI number for Angela Biesen is 1699121491. It was assigned to this individual provider in the NPPES registry on May 11, 2016. The provider is also known as Mrs. Angela Claire Whitaker Do.

Where is Angela Biesen located?

Angela Biesen practices at 9900 Talbert Ave Ste 301, Fountain Valley, CA 92708. The listed phone number is (714) 965-2500.

What is Angela Biesen's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Angela Biesen enrolled in Medicare?

Yes. Angela Biesen 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.

When was this NPI record last updated?

The NPPES record for Angela Biesen was last updated on May 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.