John Chang, M.D.,FACP,FACG
NPI 1780692517 · Gastroenterology Physician · Tampa, FL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Chang, M.D.,FACP,FACG is a Gastroenterology Physician provider in Tampa, FL (NPI 1780692517).
Provider details
- NPI number
- 1780692517
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.,FACP,FACG
- Sex
- Male
- Sole proprietor
- Yes
- License
- ME66502 (FL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
614 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 261 | $125 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 95 | $159 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 62 | $155 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 51 | $101 |
| Ultrasound Scan of Organ Tissue for Measuring Elasticity76981 | 40 | $98 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 307 | 143 |
| Pantoprazole Sodium | 147 | 63 |
| Dicyclomine Hcl | 112 | 54 |
| Linaclotidebrand: Linzess | 49 | 22 |
| Diphenoxylate Hcl/Atropinebrand: Diphenoxylate-Atropine | 46 | 14 |
| Mesalamine | 36 | 11 |
| Sucralfate | 22 | 13 |
| Tenapanor Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$612 across 22 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 4695 Van Dyke RdLutz, FL 33558-4880Phone: (813) 920-8882Fax: (813) 920-8883
Registry dates
- Enumerated
- 2006-08-04
- Last updated
- 2021-09-28
- Certified
- 2021-09-28
Frequently asked questions
- What is John Chang's NPI number?
- John Chang's National Provider Identifier (NPI) is 1780692517, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chang's specialty?
- John Chang is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is John Chang located?
- John Chang's practice location on file with NPPES is 11912 Sheldon Rd, Tampa, FL 33626-3643.
- What is John Chang's phone number?
- The practice phone number listed in the NPPES registry for John Chang is (813) 920-8882.
- Does John Chang accept Medicare?
- John Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Chang's NPI active?
- Yes — John Chang's NPI (1780692517) is active in the NPPES registry as of the last update on 2021-09-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.