Mark James Dillman, APNP, CNP
NPI 1851081921ActiveIndividual· Nurse Practitioner· La Crosse, WI
Nurse Practitioner (APNP, CNP) with Mayo Clinic Health System-Southwest Wisconsin Region Inc, practicing in La Crosse, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $393,181 for 1,417 claims, against $33,196 paid for services in 2024. Lists Mayo Clinic Health System-Franciscan Medical Center Inc and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1851081921 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APNP, CNP |
| Sole proprietor | No |
| NPI issued | May 11, 2023 |
| Last updated in NPPES | Oct 30, 2023 |
| Certified by provider | Oct 30, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 14178 | WI |
| Nurse Practitioner | 363L00000X | 223971-30 | WI |
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 - Nurse Practitioner (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 338 |
|---|---|
| Services billed | 785 across 5 procedure codes |
| Paid by Medicare | $33,196 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,417 · 3,102 30-day fills |
|---|---|
| Patients | 284 |
| Total drug cost | $393,181 |
| Generic share | 75% of claims |
Education and affiliations
| Graduation year | 2023 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Mayo Clinic Health System-Southwest Wisconsin Region IncLa Crosse, WI · 534 clinicians
Hospital affiliations
- Mayo Clinic Health System-Franciscan Medical Center IncLa Crosse, WI
- Mayo Clinic Hlth Systm Franciscan Hlthcare SpartaSparta, WI
- Veterans Memorial HospitalWaukon, IA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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