Doctor profile · Federal record
Dr. Gene Chang, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Munster, IN
- NPI 1033240411
- Accepts Medicare
- 25 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
9030 Columbia Ave
Munster, IN 463212905
(219) 836-6002
fax (219) 836-6003 - Mailing address
-
1041 Killarney Dr
Dyer, IN 463111294
Credentials & registration
- NPI registered
- March 2007 — 19 yrs on file
- Profile last updated
- July 8, 2007
- Year of graduation
- 2001 — 25 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1033240411. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,261
Distinct HCPCS
10
Medicare allowed
$188,665
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 401 | 399 | $227 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 302 | 287 | $75 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 137 | 137 | $100 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 91 | 83 | $118 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 65 | 65 | $166 | |
43249 |
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm | 59 | 58 | $110 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 55 | 53 | $162 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 41 | 41 | $162 | |
G0121 |
Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 35 | 35 | $168 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 32 | 32 | $160 |
In context: peer comparison
Among 6 peers in this city , average services per provider: 77. This provider delivers 16× the peer median.Open Payments
Industry payments received
All-time total
$3,292
Transactions
44
Manufacturers
11
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Braintree Laboratories, Inc. | 3 | $2,221.45 | |
| Boston Scientific Corporation | 5 | $368.93 | |
| ABBVIE INC. | 18 | $196.09 | |
| Janssen Scientific Affairs, LLC | 1 | $148.87 | |
| GENZYME CORPORATION | 2 | $147.01 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 6 | $91.06 | |
| Janssen Biotech, Inc. | 5 | $45.47 | |
| AIMMUNE THERAPEUTICS, INC. | 1 | $21.10 | |
| Celgene Corporation | 1 | $19.21 | |
| Ardelyx, Inc. | 1 | $16.74 | |
| IRONWOOD PHARMACEUTICALS, INC | 1 | $16.22 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,067
Patients
599
Total drug cost
$231,483
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 418 | 136 | $6,307 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 186 | 186 | $13,780 |
| Gavilyte-C (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 98 | 95 | $1,810 |
| Omeprazole | Generic | 88 | 32 | $975 |
| Sutab (Sod Sulf/Pot Chloride/Mag Sulf) | Brand | 88 | 88 | $14,953 |
| Zenpep (Lipase/Protease/Amylase) | Brand | 29 | 0 | $86,739 |
| Sucralfate | Generic | 24 | 11 | $1,522 |
| Famotidine | Generic | 23 | 0 | $327 |
| Clenpiq (Sod Picosulf/Mag Ox/Citric Ac) | Brand | 20 | 20 | $3,623 |
| Dicyclomine Hcl | Generic | 19 | 0 | $534 |
Hospital affiliations
Frequently asked questions
What is Dr. Gene Chang's medical specialty?
Dr. Gene Chang practices Gastroenterology Physician in Munster, IN.
Where does Dr. Gene Chang practice?
Dr. Gene Chang practices at 9030 Columbia Ave, Munster, IN 463212905. Office phone: 2198366002.
What is Dr. Gene Chang's NPI?
Dr. Gene Chang's National Provider Identifier (NPI) is 1033240411, issued by NPPES.
Does Dr. Gene Chang accept Medicare assignment?
Yes. Dr. Gene Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gene 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); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.