Doctor profile · Federal record
Dr. Joy Chang, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Internal Medicine Physician · Ann Arbor, MI
- NPI 1194091827
- Accepts Medicare
- 14 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1500 East Medical Center Dr, 3Rd Floor Taubman Center Recp D
Ann Arbor, MI 481095382
(734) 647-5944 - Mailing address
-
3621 S State St
Ann Arbor, MI 481081633
Credentials & registration
- NPI registered
- March 2012 — 14 yrs on file
- Profile last updated
- December 6, 2018
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Michigan #4301106697
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1194091827. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
109
Distinct HCPCS
7
Medicare allowed
$12,749
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 22 | 21 | $121 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 21 | 21 | $84 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 15 | 15 | $125 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 14 | 14 | $177 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 13 | 13 | $133 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 13 | 12 | $81 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 11 | 11 | $108 |
In context: peer comparison
Among 24 peers in this city , average services per provider: 25. This provider delivers 4.4× the peer median.Open Payments
Industry payments received
All-time total
$8,905
Transactions
15
Manufacturers
5
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | 7 | $5,938.23 | |
| E.R. Squibb & Sons, L.L.C. | 1 | $2,400.00 | |
| GENZYME CORPORATION | 4 | $270.43 | |
| Phathom Pharmaceuticals, Inc. | 1 | $187.64 | |
| Regeneron Healthcare Solutions, Inc. | 2 | $108.82 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
114
Patients
12
Total drug cost
$257,617
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 43 | 12 | $1,394 |
| Dupixent Pen (Dupilumab) | Brand | 18 | 0 | $129,741 |
| Dupixent Syringe (Dupilumab) | Brand | 16 | 0 | $125,675 |
| Pantoprazole Sodium | Generic | 14 | 0 | $263 |
| Esomeprazole Magnesium | Generic | 12 | 0 | $378 |
| Promethazine Hcl | Generic | 11 | 0 | $166 |
Hospital affiliations
Frequently asked questions
What is Dr. Joy Chang's medical specialty?
Dr. Joy Chang practices Gastroenterology Physician in Ann Arbor, MI.
Where does Dr. Joy Chang practice?
Dr. Joy Chang practices at 1500 East Medical Center Dr, Ann Arbor, MI 481095382. Office phone: 7346475944.
What is Dr. Joy Chang's NPI?
Dr. Joy Chang's National Provider Identifier (NPI) is 1194091827, issued by NPPES.
Does Dr. Joy Chang accept Medicare assignment?
Yes. Dr. Joy Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Joy Chang commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Established patient office or other outpatient visit (HCPCS 99214); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.