Karl R. Stammer, FPMHNP
NPI 1164736559ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Joplin, MO
Nurse Practitioner, Psych/Mental Health (FPMHNP) with Ozark Center, practicing in Joplin, Missouri. Their prescriptions cost Medicare Part D more than their services did: $3,515,213 for 10,536 claims, against $30,772 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 5 companies reporting payments in 2025, $1,090 in all, mostly food and beverage.
Overview
| NPI | 1164736559 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FPMHNP |
| Sole proprietor | No |
| NPI issued | Jul 28, 2010 |
| Last updated in NPPES | May 7, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | 2010025836 | 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 - Nurse Practitioner (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 159 |
|---|---|
| Services billed | 501 across 3 procedure codes |
| Paid by Medicare | $30,772 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,536 · 13,978 30-day fills |
|---|---|
| Patients | 418 |
| Total drug cost | $3,515,213 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Ozark CenterJoplin, MO · 40 clinicians
Industry payments (Open Payments)
- 2025$1,090 · 18 payments from 5 companies
- 2024$1,240 · 14 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $385.38 | 4 |
| Vanda Pharmaceuticals Inc. | $247.09 | 10 |
| Axsome Therapeutics, Inc. | $222.56 | 2 |
| Neurocrine Biosciences, Inc. | $123.61 | 1 |
| Teva Pharmaceuticals USA, Inc. | $111.49 | 1 |
What the 2025 payments were for
- Food and Beverage$978.64 · 17 payments
- Education$111.49 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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