Karissa Leah Tryska, DO
NPI 1174741409ActiveIndividual· Obstetrics & Gynecology· Muskegon, MI
Obstetrics & Gynecology (DO) in Muskegon, Michigan, trained at Michigan State University College of Osteopathic Medicine (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $7,469 for 96 claims, against $3,542 paid for services in 2024. Biogen, Inc. was the largest of 3 companies reporting payments in 2025, $128.32 in all, mostly food and beverage.
Overview
| NPI | 1174741409 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Apr 23, 2007 |
| Last updated in NPPES | Aug 10, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Obstetrics & Gynecology Primary | 207V00000X | 5101015747 | MI |
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 - Obstetrics/Gynecology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 34 |
|---|---|
| Services billed | 53 across 19 procedure codes |
| Paid by Medicare | $3,542 |
Part D prescriptions in 2024
| Prescriptions (claims) | 96 · 243 30-day fills |
|---|---|
| Patients | 33 |
| Total drug cost | $7,469 |
| Generic share | 97% of claims |
Education and affiliations
| Medical school | Michigan State University College of Osteopathic Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Obstetrics/Gynecology |
Medical groups
- Mercy Health Partners - Physician SpecialistMuskegon, MI · 67 clinicians
- Mercy Women's Health ServicesMuskegon, MI · 12 clinicians
Hospital affiliation
- Trinity Health Muskegon HospitalMuskegon, MI
Industry payments (Open Payments)
- 2025$128.32 · 3 payments from 3 companies
- 2024$201.43 · 6 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biogen, Inc. | $97.22 | 1 |
| Hologic Sales and Service, LLC | $19.22 | 1 |
| Organon LLC | $11.88 | 1 |
What the 2025 payments were for
- Food and Beverage$128.32 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other OB-GYNs in Muskegon
- 1033319181
- 1093147241
- 1164862033
- 1396964169
- 1659719060
- 1689089716
- 1952520736
- 1114554193
- 1134501562
- 1225440373
- 1265069132
- 1366029985