Mary Ann Yi-Ang Huang, M.D.
NPI 1477621902ActiveIndividual· Internal Medicine, Gastroenterology· Casper, WY
Internal Medicine, Gastroenterology (M.D.) in Casper, Wyoming, trained at Loyola University of Chicago, Stritch School of Medicine (class of 1996). Their prescriptions cost Medicare Part D more than their services did: $295,668 for 639 claims, against $36,358 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 8 companies reporting payments in 2025, $74,804 in all, mostly speaking and faculty fees.
Overview
| NPI | 1477621902 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Dec 1, 2006 |
| Last updated in NPPES | Oct 6, 2026 |
| Certified by provider | Oct 6, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 12864C | WY |
| Internal Medicine, Gastroenterology | 207RG0100X | DR.0056376 | CO |
| Internal Medicine | 207R00000X | 4301076336 | MI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (CO); Practitioner - Gastroenterology (MT); Practitioner - Gastroenterology (WY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 263 |
|---|---|
| Services billed | 435 across 27 procedure codes |
| Paid by Medicare | $36,358 |
Part D prescriptions in 2024
| Prescriptions (claims) | 639 · 1,049 30-day fills |
|---|---|
| Patients | 216 |
| Total drug cost | $295,668 |
| Generic share | 77% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 1996 |
| Medicare specialty | Gastroenterology |
| Telehealth | Offers telehealth |
Medical group
- Healthone Clinic Services - Medical Specialties LLCDenver, CO · 21 clinicians
Hospital affiliations
- Banner Wyoming Medical CenterCasper, WY
- Billings Clinic HospitalBillings, MT
- HCA Healthone Presbyterian St. LukesDenver, CO
- Intermountain Health St Vincent Regional HospitalBillings, MT
- Montrose Regional HealthMontrose, CO
Industry payments (Open Payments)
- 2025$74,804 · 99 payments from 8 companies
- 2024$61,150 · 105 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $37,863 | 34 |
| Abbvie Inc. | $18,350 | 24 |
| Gilead Sciences, Inc. | $10,410 | 22 |
| Ipsen Biopharmaceuticals, Inc | $5,916 | 7 |
| Intercept Pharmaceuticals, Inc. | $2,044 | 5 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$56,422 · 15 payments
- Travel and Lodging$6,255 · 30 payments
- Consulting Fee$6,200 · 2 payments
- Food and Beverage$3,103 · 49 payments
- Honoraria$2,760 · 1 payment
- Education$64.54 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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