Avian Chien Leong Vincent Chang, M.D.
NPI 1700271178ActiveIndividual· Surgery· Bangor, ME
Surgery (M.D.) with Eastern Maine Medical Center, practicing in Bangor, Maine. Mostly services rather than prescriptions: Medicare paid $19,814 for 114 patients in 2024, with only 12 Part D claims. Intuitive Surgical, Inc. was the largest of 2 companies reporting payments in 2025, $1,572 in all, mostly travel and lodging. Lists Northern Light Eastern Maine Medical Center as a hospital affiliation.
Overview
| NPI | 1700271178 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 2, 2015 |
| Last updated in NPPES | Mar 10, 2022 |
| Certified by provider | Mar 10, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | MD24256 | ME |
| Surgery | 208600000X | MT207986 | PA |
| Surgery, Surgical Critical Care | 2086S0102X | 2020016495 | MO |
| Surgery, Surgical Critical Care | 2086S0102X | MD470306 | PA |
| Surgery, Surgical Critical Care | 2086S0102X | MD24256 | ME |
| Surgery, Trauma Surgery | 2086S0127X | MD24256 | ME |
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 - General Surgery (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 114 |
|---|---|
| Services billed | 166 across 31 procedure codes |
| Paid by Medicare | $19,814 |
Part D prescriptions in 2024
| Prescriptions (claims) | 12 · 16 30-day fills |
|---|---|
| Total drug cost | $245.71 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2014 |
|---|---|
| Medicare specialty | General Surgery |
Medical group
- Eastern Maine Medical CenterBangor, ME · 624 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$1,572 · 8 payments from 2 companies
- 2024$20.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $1,130 | 3 |
| Medical Device Business Services, Inc. | $442.15 | 5 |
What the 2025 payments were for
- Travel and Lodging$1,074 · 4 payments
- Food and Beverage$498.39 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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