Johnny A. Chang, M.D.
NPI 1619975182ActiveIndividual· Urology· Middletown, CT
Urology (M.D.) in Middletown, Connecticut, trained at Un of California, Irvine, College of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $595,822 for 5,935 claims, against $88,569 paid for services in 2024. Gyrus Acmi, Inc. was the largest of 2 companies reporting payments in 2025, $2,674 in all, mostly consulting fees.
Overview
| NPI | 1619975182 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 8, 2005 |
| Last updated in NPPES | May 5, 2026 |
| Certified by provider | May 5, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Urology Primary | 208800000X | 041177 | CT |
| Specialist | 174400000X | 041177 | CT |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Urology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 640 |
|---|---|
| Services billed | 1,166 across 58 procedure codes |
| Paid by Medicare | $88,569 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,935 · 13,969 30-day fills |
|---|---|
| Patients | 1,126 |
| Total drug cost | $595,822 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Un of California, Irvine, College of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Urology |
| Telehealth | Offers telehealth |
Medical group
- Mhs Primary Care, Inc.Essex, CT · 180 clinicians
Hospital affiliation
- Middlesex HospitalMiddletown, CT
Industry payments (Open Payments)
- 2025$2,674 · 4 payments from 2 companies
- 2024$584.01 · 19 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gyrus Acmi, Inc. | $2,630 | 2 |
| Sumitomo Pharma America, Inc. | $44.22 | 2 |
What the 2025 payments were for
- Consulting Fee$2,630 · 2 payments
- Food and Beverage$44.22 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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