Zachary Zimko, D.O.
NPI 1437508561ActiveIndividual· Psychiatry & Neurology, Psychiatry· Largo, FL
Psychiatry & Neurology, Psychiatry (D.O.) with Bywater Mental Health PLLC, practicing in Largo, Florida. Their prescriptions cost Medicare Part D more than their services did: $358,237 for 2,538 claims, against $26,268 paid for services in 2024. Axsome Therapeutics, Inc. was the largest of 19 companies reporting payments in 2025, $2,151 in all, mostly food and beverage.
Overview
| NPI | 1437508561 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | Yes |
| NPI issued | Jun 9, 2016 |
| Last updated in NPPES | Jun 28, 2021 |
| Certified by provider | Jun 28, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | OS15199 | FL |
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 (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 84 |
|---|---|
| Services billed | 425 across 4 procedure codes |
| Paid by Medicare | $26,268 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,538 · 3,457 30-day fills |
|---|---|
| Patients | 141 |
| Total drug cost | $358,237 |
| Generic share | 93% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Psychiatry |
| Secondary specialties | Neuropsychiatry |
| Telehealth | Offers telehealth |
Medical group
- Bywater Mental Health PLLCClearwater, FL · 5 clinicians
Industry payments (Open Payments)
- 2025$2,151 · 104 payments from 19 companies
- 2024$1,598 · 85 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Axsome Therapeutics, Inc. | $474.82 | 13 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $245.99 | 14 |
| Abbvie Inc. | $233.24 | 9 |
| Neurocrine Biosciences, Inc. | $209.71 | 11 |
| Teva Pharmaceuticals USA, Inc. | $207.35 | 20 |
What the 2025 payments were for
- Food and Beverage$2,151 · 104 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 25 psychiatrists in Largo · All psychiatrists in Florida