Doctor profile · Federal record
Dr. Dean Chang, MD
Gastroenterology Physician (CMS: Gastroenterology) · Hamden, CT
- NPI 1770564247
- Accepts Medicare
- MIPS 82.4 / 100 · 2023
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2200 Whitney Ave, Suite 360
Hamden, CT 065183691
(203) 281-4463
Credentials & registration
- NPI registered
- November 2005 — 21 yrs on file
- Profile last updated
- May 27, 2021
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Connecticut #034043
- Medicaid
- CT #001340439
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1770564247. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
392
Distinct HCPCS
9
Medicare allowed
$48,979
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 130 | 99 | $95 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 68 | 68 | $120 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 50 | 49 | $105 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 39 | 39 | $265 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 36 | 36 | $151 | |
99221 |
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | 20 | 19 | $87 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 19 | 14 | $83 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 16 | 16 | $193 | |
99202 |
New patient office or other outpatient visit, 15-29 minutes | 14 | 14 | $78 |
In context: peer comparison
Among 10 peers in Hamden Gastroenterology Physician, average services per provider: 124. This provider delivers 3.2× the peer median.Open Payments
Industry payments received
All-time total
$3,034
Transactions
125
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 38 | $723.16 | |
| Gilead Sciences, INC. | 27 | $633.41 | |
| Qol Medical, LLC | 15 | $463.28 | |
| Aimmune Therapeutics, INC. | 4 | $197.27 | |
| Celgene Corporation | 9 | $155.09 | |
| AstraZeneca Pharmaceuticals Lp | 1 | $120.98 | |
| Ardelyx, INC. | 5 | $118.74 | |
| Regeneron Healthcare Solutions, INC. | 4 | $95.21 | |
| Pfizer INC. | 4 | $73.87 | |
| Takeda Pharmaceuticals U.S.A., INC. | 3 | $73.29 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 4 | $73.17 | |
| Janssen Biotech, INC. | 4 | $70.23 | |
| Ironwood Pharmaceuticals, INC | 3 | $65.57 | |
| Lilly USA, LLC | 2 | $49.31 | |
| Phathom Pharmaceuticals, INC. | 2 | $35.85 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
866
Patients
207
Total drug cost
$255,114
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 216 | 75 | $3,817 |
| Omeprazole | Generic | 99 | 33 | $1,524 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 83 | 17 | $30,611 |
| Linzess (Linaclotide) | Brand | 55 | 17 | $50,738 |
| Azathioprine | Generic | 52 | 16 | $3,875 |
| Cyclobenzaprine Hcl | Generic | 51 | 0 | $226 |
| Creon (Lipase/Protease/Amylase) | Brand | 49 | 0 | $56,351 |
| Rabeprazole Sodium | Generic | 48 | 21 | $3,352 |
| Dicyclomine Hcl | Generic | 45 | 17 | $2,162 |
| Ursodiol | Generic | 39 | 11 | $15,551 |
Frequently asked questions
What is Dr. Dean Chang's medical specialty?
Dr. Dean Chang practices Gastroenterology Physician in Hamden, CT.
Where does Dr. Dean Chang practice?
Dr. Dean Chang practices at 2200 Whitney Ave, Hamden, CT 065183691. Office phone: 2032814463.
What is Dr. Dean Chang's NPI?
Dr. Dean Chang's National Provider Identifier (NPI) is 1770564247, issued by NPPES.
Does Dr. Dean Chang accept Medicare assignment?
Yes. Dr. Dean Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Dean Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); New patient office or other outpatient visit (HCPCS 99203); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.