Doctor profile · Federal record
Dr. Stephen Chang, MD
Gastroenterology Physician (CMS: Gastroenterology) · Chicago, IL
- NPI 1770695793
- Accepts Medicare
- MIPS 91.3 / 100 · 2023
- 27 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
675 N Saint Clair St, Galter 17-250
Chicago, IL 606115975
(312) 695-5620
fax (312) 695-7095 - Mailing address
-
680 N Lake Shore Dr, Suite #1000
Chicago, IL 606118709
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- June 25, 2015
- Year of graduation
- 1999 — 27 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Illinois #036106945
- Medicaid
- IL #036106945
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1770695793. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
528
Distinct HCPCS
10
Medicare allowed
$73,822
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 117 | 117 | $273 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 106 | 101 | $69 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 72 | 72 | $108 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 55 | 55 | $139 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 40 | 40 | $96 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 25 | 25 | $189 | |
99442 |
Telephone medical discussion with physician, 11-20 minutes | 23 | 19 | $70 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 22 | 22 | $104 | |
G0500 |
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 21 | 21 | $6 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 19 | 19 | $196 |
In context: peer comparison
Among 70 peers in Chicago Gastroenterology Physician, average services per provider: 239. This provider delivers 2.2× the peer median.Open Payments
Industry payments received
All-time total
$18
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Olympus America INC. | 1 | $17.53 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
583
Patients
307
Total drug cost
$73,570
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 226 | 221 | $4,842 |
| Omeprazole | Generic | 120 | 47 | $1,631 |
| Pantoprazole Sodium | Generic | 37 | 15 | $764 |
| Linzess (Linaclotide) | Brand | 32 | 0 | $26,117 |
| Famotidine | Generic | 25 | 11 | $450 |
| Ondansetron Odt (Ondansetron) | Brand | 22 | 0 | $309 |
| Diphenoxylate-Atropine (Diphenoxylate Hcl/Atropine) | Brand | 21 | 0 | $540 |
| Colestipol Hcl | Generic | 17 | 0 | $1,482 |
| Creon (Lipase/Protease/Amylase) | Brand | 17 | 0 | $22,868 |
| Rabeprazole Sodium | Generic | 15 | 0 | $2,140 |
Frequently asked questions
What is Dr. Stephen Chang's medical specialty?
Dr. Stephen Chang practices Gastroenterology Physician in Chicago, IL.
Where does Dr. Stephen Chang practice?
Dr. Stephen Chang practices at 675 N Saint Clair St, Chicago, IL 606115975. Office phone: 3126955620.
What is Dr. Stephen Chang's NPI?
Dr. Stephen Chang's National Provider Identifier (NPI) is 1770695793, issued by NPPES.
Does Dr. Stephen Chang accept Medicare assignment?
Yes. Dr. Stephen Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Stephen Chang commonly perform?
Top Medicare-reported procedures in 2023: Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Established patient office or other outpatient visit (HCPCS 99213); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.