Mark Douglas Ensberg, MD
NPI 1912936527ActiveIndividual· Internal Medicine, Geriatric Medicine· Holt, MI
Internal Medicine, Geriatric Medicine (MD) in Holt, Michigan, trained at Sanford School of Medicine of University of South Dakota (class of 1981). Their prescriptions cost Medicare Part D more than their services did: $232,754 for 5,778 claims, against $22,443 paid for services in 2024.
Overview
| NPI | 1912936527 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 3, 2006 |
| Last updated in NPPES | Jun 12, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Geriatric Medicine Primary | 207RG0300X | 4301048610 | 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 | 90 |
|---|---|
| Services billed | 299 across 9 procedure codes |
| Paid by Medicare | $22,443 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,778 · 5,812 30-day fills |
|---|---|
| Patients | 125 |
| Total drug cost | $232,754 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Sanford School of Medicine of University of South Dakota |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Geriatric Medicine |
Medical group
- Msu Health Care Inc.East Lansing, MI · 198 clinicians
Hospital affiliation
- Edward W Sparrow HospitalLansing, MI
Other facilities
- Heart To Heart Hospice of Lansing, LLCHospice · East Lansing, MI
- Optimal Care HospiceHospice · Jackson, MI
- Sparrow Hospice ServicesHospice · Lansing, MI
- Burcham Hills Retirement CenterNursing home · East Lansing, MI
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records