MARY ANN YI-ANG HUANG (M.D.) – Gastroenterology Physician, NPI 1477621902
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
369 GASTROENTEROLOGY in CO
Provider Addresses for MARY ANN YI-ANG HUANG (M.D.)
1601 E 19TH AVE STE 5050
DENVER, CO 802181200
Phone: (720) 754-2155
Fax: (720) 754-2106
Type: Location
315 N 25th St Ste 201
Billings, MT 591011328
Phone: (720) 949-9992
Fax: (720) 746-6462
Type: Location
940 E 3rd St Ste 201
Casper, WY 826013251
Phone: (720) 949-9992
Fax: (720) 746-6462
Type: Location
1601 E 19th Ave Ste 5050
Denver, CO 802181200
Phone: (720) 754-2155
Fax: (720) 754-2106
Type: Location
801 Encino Pl NE Ste B11
Albuquerque, NM 871022642
Phone: (720) 949-9992
Fax: (720) 746-6462
Type: Location
9949 S OSWEGO ST STE 200
PARKER, CO 801343753
Phone: (303) 925-4720
Fax: (303) 925-4721
Type: Mailing
9403 CROWN CREST BLVD STE 420
PARKER, CO 801389049
Phone: (303) 925-4720
Fax: (303) 925-4721
Type: Mailing
2352 Meadows Blvd Ste 300
Castle Rock, CO 801098419
Phone: (720) 455-3879
Fax: (720) 455-3795
Type: Location
1601 E 19th Ave Ste 5150
Denver, CO 802181201
Phone: (720) 754-2155
Fax: (720) 754-2106
Type: Location
9949 S Oswego St
Parker, CO 801343753
Phone: (303) 925-4720
Fax: (303) 925-4721
Type: Location
2535 S Downing St Ste 380
Denver, CO 802105850
Phone: (303) 778-5797
Fax: (303) 778-5205
Type: Location
1601 E 19TH AVE STE 5150
DENVER, CO 802181201
Phone: (720) 754-2155
Fax: (720) 754-2106
Type: Location
Peoria Hills Park, Aurora, Arapahoe County, Colorado, 80012, United States
PARKER, CO 801343753
Phone: (303) 925-4720
Fax: (303) 925-4721
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 144 Open Payments records for all available years, with a total value of $78,101.
Total Amount is formed as General ($78,101) + Research ($0) + Ownership ($0) = $78,101.
Last reported payment date: 2024-12-16 • Largest payer in this snapshot: Gilead Sciences, Inc. ($30,943).
Total Amount
$78,101
General + Research + Ownership
Payments
144
Total payment records
General Amount
$78,101
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-16
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Gilead Sciences, Inc. | $30,943 |
| Madrigal Pharmaceuticals | $21,055 |
| Intercept Pharmaceuticals, Inc. | $10,043 |
| ABBVIE INC. | $9,433 |
| INTERCEPT PHARMACEUTICALS, INC. | $5,004 |
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-04-07
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20160526002233 | I | Gastroenterology | CO | TBD |
| I20250407003170 | I | Gastroenterology | WY | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 61 | 50 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 54 | 50 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 49 | 48 | $0 |
| 99202 | New patient office or other outpatient visit, 15-29 minutes | 47 | 47 | $0 |
| 99221 | Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 43 | 42 | $0 |
Insurance plans in this area (ZIP 80218)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | CO | 43235 | Diagnostic examination of esophagus, stomach, and/or upper small bowel using an endoscope | 18 | 17 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Gastroenterology | CO | |
| Gastroenterology, Internal Medicine | CO | |
| G A S T R O E N T E R O L O G Y | CO | |
| Certified Registered Nurse Anesthetist (Crna) | TX | |
| Physician Assistant | IL | |
| Certified Registered Nurse Anesthetist (Crna) | CO | |
| Certified Registered Nurse Anesthetist (Crna) | CO | |
| Certified Registered Nurse Anesthetist (Crna) | TX | |
| - | CO | |
| Certified Registered Nurse Anesthetist (Crna) | NC |
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