Mark Zimmerman, MD
NPI 1508842857ActiveIndividual· Psychiatry & Neurology, Psychiatry· Cranston, RI
Psychiatry & Neurology, Psychiatry (MD) with South County Psychiatry LLC, practicing in Cranston, Rhode Island. 20 Medicare patients in 2024, $8,538 paid; all of their 457 Part D prescriptions were generic. Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) was the largest of 4 companies reporting payments in 2025, $58,029 in all, mostly speaking and faculty fees.
Overview
| NPI | 1508842857 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 19, 2005 |
| Last updated in NPPES | Oct 29, 2026 |
| Certified by provider | Oct 29, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | MD08762 | RI |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Psychiatry (RI); Practitioner - Psychiatry (VT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 20 |
|---|---|
| Services billed | 138 across 4 procedure codes |
| Paid by Medicare | $8,538 |
Part D prescriptions in 2024
| Prescriptions (claims) | 457 · 845 30-day fills |
|---|---|
| Patients | 43 |
| Total drug cost | $10,064 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Psychiatry |
| Telehealth | Offers telehealth |
Medical group
- South County Psychiatry LLCCranston, RI · 31 clinicians
Industry payments (Open Payments)
- 2025$58,029 · 82 payments from 4 companies
- 2024$67,776 · 63 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $56,181 | 71 |
| Merck Sharp & Dohme LLC | $1,785 | 8 |
| Otsuka America Pharmaceutical, Inc. | $44.27 | 2 |
| Novo Nordisk Inc | $19.00 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$32,415 · 7 payments
- Consulting Fee$11,659 · 2 payments
- Travel and Lodging$11,613 · 32 payments
- Food and Beverage$2,343 · 41 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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