William Robert Barclay, CNP
NPI 1144810573ActiveIndividual· Nurse Practitioner· Boston, MA
Nurse Practitioner (CNP) with Massachusetts General Physicians Organization Inc, practicing in Boston, Massachusetts. Mostly services rather than prescriptions: Medicare paid $19,876 for 109 patients in 2024, with only 37 Part D claims. Lists Massachusetts General Hospital as a hospital affiliation.
Overview
| NPI | 1144810573 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CNP |
| Sole proprietor | Yes |
| NPI issued | Jan 20, 2021 |
| Last updated in NPPES | Mar 1, 2021 |
| Certified by provider | Mar 1, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | RN2320814 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 109 |
|---|---|
| Services billed | 242 across 7 procedure codes |
| Paid by Medicare | $19,876 |
Part D prescriptions in 2024
| Prescriptions (claims) | 37 · 39 30-day fills |
|---|---|
| Patients | 19 |
| Total drug cost | $1,322 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Massachusetts General Physicians Organization IncBoston, MA · 3,558 clinicians
Hospital affiliation
- Massachusetts General HospitalBoston, 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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