Mark C. Chandler, MD
NPI 1265452270ActiveIndividual· Psychiatry & Neurology, Psychiatry· Durham, NC
Psychiatry & Neurology, Psychiatry (MD) in Durham, North Carolina, trained at University of Wisconsin School of Medicine (class of 1982). Their prescriptions cost Medicare Part D more than their services did: $1,622,333 for 12,032 claims, against $76,852 paid for services in 2024. Alkermes, Inc. was the largest of 16 companies reporting payments in 2025, $2,651 in all, mostly food and beverage.
Overview
| NPI | 1265452270 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 20, 2006 |
| Last updated in NPPES | Mar 7, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 31000 | NC |
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 - Psychiatry (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 497 |
|---|---|
| Services billed | 1,546 across 7 procedure codes |
| Paid by Medicare | $76,852 |
Part D prescriptions in 2024
| Prescriptions (claims) | 12,032 · 13,209 30-day fills |
|---|---|
| Patients | 480 |
| Total drug cost | $1,622,333 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Psychiatry |
| Secondary specialties | Neuropsychiatry |
Industry payments (Open Payments)
- 2025$2,651 · 158 payments from 16 companies
- 2024$2,771 · 164 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alkermes, Inc. | $511.38 | 36 |
| Vanda Pharmaceuticals Inc. | $419.04 | 24 |
| Otsuka America Pharmaceutical, Inc. | $384.11 | 17 |
| Abbvie Inc. | $329.19 | 21 |
| Teva Pharmaceuticals USA, Inc. | $175.71 | 10 |
What the 2025 payments were for
- Food and Beverage$2,651 · 158 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 248 psychiatrists in Durham · All psychiatrists in North Carolina