Quick answers
- Does Mary Ann A. Huang accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Ann A. Huang accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Mary Ann A. Huang see?
- In 2024, CMS data shows 263 Original Medicare patients and 435 services for Mary Ann A. Huang. This counts Original Medicare only and measures volume, not quality.
- What is Mary Ann A. Huang's NPI number?
- 1477621902. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Mary Ann A. Huang, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 263 |
|---|---|
| Services billed to Medicare | 435 |
| Different services or procedures | 27 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)85 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)58 services
- Biopsy of large bowel using a flexible endoscope (45380)58 services
- New patient office or other outpatient visit with straightforward medical decision making, if using time, 15 minutes or more (99202)50 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)28 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure68%
- Arthritis51%
- Anxiety32%
- Depression27%
- Diabetes26%
Hospitals where Mary Ann A. Huang works
Medicare's Facility Affiliation Data lists Mary Ann A. Huang at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Banner Wyoming Medical CenterCasper, WY · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 530012
- Billings Clinic HospitalBillings, MT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 270004
- HCA HealthOne Presbyterian St. LukesDenver, CO · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 060014
- Intermountain Health St Vincent Regional HospitalBillings, MT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 270049
- Montrose Regional HealthMontrose, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060006
Practice locations
Addresses where Mary Ann A. Huang is enrolled with Medicare (CMS data updated October 2, 2026).
- 1601 E 19th Ave, Suite 5050Denver, CO 80218 (720) 754‑2155
- 315 N 25th St, Suite 2Billings, MT 59101 (720) 383‑2451
- 940 E 3rd St, Suite 201Casper, WY 82601 (307) 265‑4165
Group practices
Medicare enrollment lists Mary Ann A. Huang as a member of this group (CMS data updated October 2, 2026).
- HealthONE Clinic Services - Medical Specialties LLC21 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Denver
Clinicians with the same Medicare primary specialty in Denver, CO — not a recommendation.
Other clinicians in HealthONE Clinic Services - Medical Specialties LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1477621902 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians