Angela Biesen, D.O.
NPI 1699121491 · Internal Medicine Physician · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Angela Biesen, D.O. is a Internal Medicine Physician provider in Fountain Valley, CA (NPI 1699121491).
Provider details
- NPI number
- 1699121491
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- No
- License
- 20A16223 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
10 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 65 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 270 | 87 |
| Levothyroxine Sodium | 167 | 44 |
| Losartan Potassium | 101 | 30 |
| Amlodipine Besylate | 101 | 30 |
| Lisinopril | 86 | 28 |
| Folic Acid | 62 | 21 |
| Pantoprazole Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$50 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 20981 Magnolia StHuntington Beach, CA 92646-6338Phone: (714) 965-2500Fax: (714) 965-2593
Registry dates
- Enumerated
- 2016-05-11
- Last updated
- 2026-05-30
- Certified
- 2026-05-30
Frequently asked questions
- What is Angela Biesen's NPI number?
- Angela Biesen's National Provider Identifier (NPI) is 1699121491, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Angela Biesen's specialty?
- Angela Biesen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Angela Biesen located?
- Angela Biesen's practice location on file with NPPES is 9900 Talbert Ave Ste 301, Fountain Valley, CA 92708-5153.
- What is Angela Biesen's phone number?
- The practice phone number listed in the NPPES registry for Angela Biesen is (714) 965-2500.
- Does Angela Biesen accept Medicare?
- Angela Biesen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Angela Biesen's NPI active?
- Yes — Angela Biesen's NPI (1699121491) is active in the NPPES registry as of the last update on 2026-05-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.