Lynn M. Larson, D.O.
NPI 1104021765ActiveIndividual· Internal Medicine· Owosso, MI
Internal Medicine (D.O.) with Memorial Hospital, practicing in Owosso, Michigan. Their prescriptions cost Medicare Part D more than their services did: $155,253 for 2,169 claims, against $25,910 paid for services in 2024. Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) was the largest of 9 companies reporting payments in 2025, $296.70 in all, mostly food and beverage. Lists Memorial Healthcare as a hospital affiliation.
Overview
| NPI | 1104021765 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jun 15, 2007 |
| Last updated in NPPES | Oct 16, 2024 |
| Certified by provider | Oct 16, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 5101017147 | 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 - Internal Medicine (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 150 |
|---|---|
| Services billed | 359 across 19 procedure codes |
| Paid by Medicare | $25,910 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,169 · 2,298 30-day fills |
|---|---|
| Patients | 100 |
| Total drug cost | $155,253 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Geriatric Medicine |
| Telehealth | Offers telehealth |
Medical group
- Memorial HospitalPerry, MI · 214 clinicians
Hospital affiliation
- Memorial HealthcareOwosso, MI
Other facilities
- Memorial HealthcareHome health agency · Owosso, MI
Industry payments (Open Payments)
- 2025$296.70 · 14 payments from 9 companies
- 2024$87.50 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $80.30 | 3 |
| Lilly USA, LLC | $59.19 | 3 |
| Otsuka America Pharmaceutical, Inc. | $53.35 | 2 |
| Corcept Therapeutics | $23.17 | 1 |
| Exact Sciences Corporation | $17.80 | 1 |
What the 2025 payments were for
- Food and Beverage$296.70 · 14 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other internal medicine physicians in Owosso
- 1114954880
- 1285603027
- 1295154466
- 1528416492
- 1669714242
- 1740221936
- 1760746481
- 1801834445
- 1871741694
- 1972530046
- 1841984648
- 1689297996
All 23 internal medicine physicians in Owosso · All internal medicine physicians in Michigan