Doctor profile · Federal record
Dr. John Chang, M.D.,FACP,FACG
Gastroenterology Physician (CMS: Gastroenterology) · Tampa, FL
- NPI 1780692517
- Accepts Medicare
- 37 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
11912 Sheldon RD
Tampa, FL 336263643
(813) 920-8882
fax (813) 920-8883 - Additional location
-
4695 van Dyke RD
Lutz, FL 335584880 - Mailing address
-
3001 Executive Dr Ste 130
Clearwater, FL 337625323
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- September 28, 2021
- Year of graduation
- 1989 — 37 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Florida #ME66502
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1780692517. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
638
Distinct HCPCS
9
Medicare allowed
$82,764
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 272 | 149 | $123 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 84 | 84 | $161 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 66 | 66 | $161 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 56 | 56 | $97 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 45 | 42 | $85 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 44 | 44 | $108 | |
76981 |
Ultrasound scan of organ tissue for measuring elasticity | 30 | 28 | $100 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 21 | 21 | $183 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 20 | 20 | $215 |
In context: peer comparison
Among 38 peers in this city , average services per provider: 66. This provider delivers 9.7× the peer median.Open Payments
Industry payments received
All-time total
$612
Transactions
22
Manufacturers
10
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 6 | $232.20 | |
| Ardelyx, Inc. | 5 | $85.81 | |
| Janssen Biotech, Inc. | 2 | $77.46 | |
| Phathom Pharmaceuticals, Inc. | 2 | $54.21 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 2 | $44.07 | |
| Regeneron Healthcare Solutions, Inc. | 1 | $32.09 | |
| Celgene Corporation | 1 | $23.51 | |
| Medtronic, Inc. | 1 | $23.28 | |
| Gilead Sciences, Inc. | 1 | $22.88 | |
| RedHill Biopharma Inc. | 1 | $16.97 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
841
Patients
405
Total drug cost
$109,807
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Famotidine | Generic | 280 | 128 | $5,139 |
| Pantoprazole Sodium | Generic | 103 | 56 | $1,326 |
| Dicyclomine Hcl | Generic | 97 | 50 | $2,011 |
| Linzess (Linaclotide) | Brand | 83 | 37 | $68,309 |
| Omeprazole | Generic | 40 | 20 | $332 |
| Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl) | Brand | 36 | 36 | $538 |
| Mesalamine | Generic | 32 | 0 | $18,512 |
| Diphenoxylate-Atropine (Diphenoxylate Hcl/Atropine) | Brand | 29 | 12 | $852 |
| Sucralfate | Generic | 25 | 12 | $1,550 |
| Ondansetron Odt (Ondansetron) | Brand | 23 | 12 | $685 |
Hospital affiliations
Frequently asked questions
What is Dr. John Chang's medical specialty?
Dr. John Chang practices Gastroenterology Physician in Tampa, FL.
Where does Dr. John Chang practice?
Dr. John Chang practices at 11912 Sheldon RD, Tampa, FL 336263643. Office phone: 8139208882.
What is Dr. John Chang's NPI?
Dr. John Chang's National Provider Identifier (NPI) is 1780692517, issued by NPPES.
Does Dr. John Chang accept Medicare assignment?
Yes. Dr. John Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. John Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99204); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.