Doctor profile · Federal record
Dr. Douglas Rex, M.D.
Gastroenterology Physician (CMS: Gastroenterology) · Indianapolis, IN
- NPI 1164486643
- Accepts Medicare
- 46 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
550 University Blvd, Uh 4100
Indianapolis, IN 462025149
(317) 278-8741 - Additional location
-
1701 N Senate Blvd
Indianapolis, IN 462021239
(888) 484-3258 - Mailing address
-
250 N Shadeland Ave
Indianapolis, IN 462194959
Credentials & registration
- NPI registered
- April 2006 — 20 yrs on file
- Profile last updated
- March 4, 2025
- Year of graduation
- 1980 — 46 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Indiana #01029838A
- Medicaid
- IN #100239400
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1164486643. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,372
Distinct HCPCS
10
Medicare allowed
$216,956
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 613 | 601 | $217 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 161 | 115 | $83 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 123 | 120 | $80 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 109 | 106 | $53 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 94 | 85 | $51 | |
45390 |
Removal of large bowel tissue using a flexible endoscope | 84 | 83 | $301 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 48 | 48 | $166 | |
43235 |
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 24 | 22 | $84 | |
99202 |
New patient office or other outpatient visit, 15-29 minutes | 21 | 21 | $67 | |
43248 |
Insertion of guide wire with dilation of esophagus using a flexible endoscope | 19 | 17 | $130 |
In context: peer comparison
Among 41 peers in this city , average services per provider: 73. This provider delivers 19× the peer median.Open Payments
Industry payments received
All-time total
$98,938
Transactions
87
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Olympus Corporation | 28 | $50,008.53 | |
| Boston Scientific Corporation | 34 | $30,945.81 | |
| Medtronic, Inc. | 11 | $7,961.80 | |
| Laborie Medical Technologies Corp. | 2 | $5,250.00 | |
| Olympus Corporation of the Americas | 11 | $2,572.27 | |
| Braintree Laboratories, Inc. | 1 | $2,200.00 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,599
Patients
1,148
Total drug cost
$921,453
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 388 | 368 | $6,665 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 284 | 271 | $7,152 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 215 | 202 | $16,811 |
| Omeprazole | Generic | 208 | 75 | $4,374 |
| Famotidine | Generic | 88 | 31 | $1,884 |
| Pantoprazole Sodium | Generic | 85 | 36 | $1,857 |
| Peg-3350 And Electrolytes (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 58 | 52 | $1,070 |
| Gavilyte-C (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 41 | 39 | $815 |
| Mesalamine | Generic | 40 | 14 | $39,681 |
| Balsalazide Disodium | Generic | 37 | 0 | $10,528 |
Frequently asked questions
What is Dr. Douglas Rex's medical specialty?
Dr. Douglas Rex practices Gastroenterology Physician in Indianapolis, IN.
Where does Dr. Douglas Rex practice?
Dr. Douglas Rex practices at 550 University Blvd, Indianapolis, IN 462025149. Office phone: 3172788741.
What is Dr. Douglas Rex's NPI?
Dr. Douglas Rex's National Provider Identifier (NPI) is 1164486643, issued by NPPES.
Does Dr. Douglas Rex accept Medicare assignment?
Yes. Dr. Douglas Rex accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Douglas Rex 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 esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.