An Chih Hsieh, M.D., MPH
NPI 1356877377 · Family Medicine Physician · Lancaster, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
An Chih Hsieh, M.D., MPH is a Family Medicine Physician provider in Lancaster, CA (NPI 1356877377).
Provider details
- NPI number
- 1356877377
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., MPH
- Sex
- Male
- Sole proprietor
- No
- License
- A171316 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
9 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- 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 · 20 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 43 | 26 |
| Amlodipine Besylate | 39 | 24 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 36 | 12 |
| Ibuprofen | 35 | 17 |
| Omeprazole | 31 | 18 |
| Losartan Potassium | 29 | 15 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$36 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
Registry dates
- Enumerated
- 2017-05-11
- Last updated
- 2025-11-26
- Certified
- 2025-11-26
Frequently asked questions
- What is An Chih Hsieh's NPI number?
- An Chih Hsieh's National Provider Identifier (NPI) is 1356877377, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is An Chih Hsieh's specialty?
- An Chih Hsieh is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is An Chih Hsieh located?
- An Chih Hsieh's practice location on file with NPPES is 43322 Gingham Ave, Lancaster, CA 93535-4576.
- What is An Chih Hsieh's phone number?
- The practice phone number listed in the NPPES registry for An Chih Hsieh is (661) 874-4050.
- Does An Chih Hsieh accept Medicare?
- An Chih Hsieh is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is An Chih Hsieh's NPI active?
- Yes — An Chih Hsieh's NPI (1356877377) is active in the NPPES registry as of the last update on 2025-11-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.