Weijen William Chang, M.D.
NPI 1235174103ActiveIndividual· Pediatrics· Springfield, MA
Pediatrics (M.D.) with Baystate Medical Practices Inc and 1 other group, practicing in Springfield, Massachusetts. Medicare paid $1,090 for services to 13 patients in 2024. Lists Baystate Medical Center as a hospital affiliation.
Overview
| NPI | 1235174103 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 17, 2006 |
| Last updated in NPPES | Mar 17, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Pediatrics Primary | 208000000X | 157873 | MA |
| Internal Medicine | 207R00000X | 157873 | MA |
| Hospitalist | 208M00000X | 157873 | MA |
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 - Hospitalist (FL); Practitioner - Pediatric Medicine (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 13 |
|---|---|
| Services billed | 13 across 2 procedure codes |
| Paid by Medicare | $1,090 |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | Hospitalist |
Medical groups
- Baystate Medical Practices IncSpringfield, MA · 1,369 clinicians
- Hospital Medicine Services of Fl, LLCSarasota, FL · 507 clinicians
Hospital affiliation
- Baystate Medical CenterSpringfield, MA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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