Charles S. Larsen, D.O.
NPI 1902169972ActiveIndividual· Family Medicine· Maryland Heights, MO
Family Medicine (D.O.) in Maryland Heights, Missouri, trained at Lake Erie College of Osteopathic Medicine, Erie (class of 2012). Their prescriptions cost Medicare Part D more than their services did: $486,727 for 7,701 claims, against $27,040 paid for services in 2024. Novo Nordisk Inc was the largest of 4 companies reporting payments in 2025, $635.41 in all, mostly food and beverage.
Overview
| NPI | 1902169972 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | Jun 24, 2012 |
| Last updated in NPPES | Nov 4, 2020 |
| Certified by provider | Nov 4, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 2015023172 | MO |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Family Practice (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 139 |
|---|---|
| Services billed | 378 across 14 procedure codes |
| Paid by Medicare | $27,040 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,701 · 17,279 30-day fills |
|---|---|
| Patients | 475 |
| Total drug cost | $486,727 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | Lake Erie College of Osteopathic Medicine, Erie |
|---|---|
| Graduation year | 2012 |
| Medicare specialty | Family Practice |
Medical group
- Ssm Medical Group IncSaint Charles, MO · 568 clinicians
Hospital affiliations
- Ssm Health Depaul Hospital St LouisBridgeton, MO
- Ssm St Clare Health CenterFenton, MO
- Ssm St Joseph Health CenterSaint Charles, MO
Other facilities
- Ssm Health Rehabilitation HospitalInpatient rehabilitation facility · Richmond Heights, MO
Industry payments (Open Payments)
- 2025$635.41 · 13 payments from 4 companies
- 2024$272.13 · 13 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $260.97 | 3 |
| Abbvie Inc. | $221.30 | 8 |
| Astrazeneca Pharmaceuticals LP | $132.68 | 1 |
| Exact Sciences Corporation | $20.46 | 1 |
What the 2025 payments were for
- Food and Beverage$635.41 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Family Medicine providers in Maryland Heights
- 1225353428
- 1043667371
- 1033734413
- 1639551666
- 1033168604
- 1548233455
- 1821031774
- 1619940277
- 1871157008
- 1174597629
- 1114125028
- 1285675793