Keshni Lata Ramnanan, M.D.
NPI 1952541849ActiveIndividual· Internal Medicine· Waukesha, WI
Internal Medicine (M.D.) with Oak Medical SC and 1 other group, practicing in Waukesha, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $4,034,226 for 57,722 claims, against $42,182 paid for services in 2024. Otsuka America Pharmaceutical, Inc. was the largest of 2 companies reporting payments in 2025, $153.06 in all, mostly food and beverage. Lists Aspirus Rhinelander Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1952541849 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 4, 2009 |
| Last updated in NPPES | Aug 5, 2022 |
| Certified by provider | Aug 5, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 54487-20 | WI |
| Internal Medicine | 207R00000X | 4301091100 | MI |
| Internal Medicine | 207R00000X | 306.159610 | IL |
| Internal Medicine | 207R00000X | CDR.0001572 | CO |
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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 322 |
|---|---|
| Services billed | 478 across 15 procedure codes |
| Paid by Medicare | $42,182 |
Part D prescriptions in 2024
| Prescriptions (claims) | 57,722 · 57,860 30-day fills |
|---|---|
| Patients | 2,413 |
| Total drug cost | $4,034,226 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 2007 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- Oak Medical SCLodi, WI · 123 clinicians
- Maple Medical SCWaukesha, WI · 23 clinicians
Hospital affiliations
- Aspirus Rhinelander HospitalRhinelander, WI
- Aspirus Riverview Hospital & Clinics IncWisconsin Rapids, WI
- Aspirus Tomahawk HospitalTomahawk, WI
- Gundersen Lutheran Medical CenterLa Crosse, WI
- St Marys Hospital Medical CtrGreen Bay, WI
Other facilities
- Aspirus at HomeHospice · Wausau, WI
- Heartland Hospice Central WisconsinHospice · Stevens Point, WI
- North Shore at HomeHospice · Glendale, WI
- Sharon S Richardson Community HospiceHospice · Sheboygan Falls, WI
- Unity HospiceHospice · De Pere, WI
- North Shore Healthcare at MarshfieldNursing home · Marshfield, WI
- Rennes Health and Rehab Center-RhinelanderNursing home · Rhinelander, WI
- Three Oaks Health ServicesNursing home · Marshfield, WI
- Tomah Nursing and RehabNursing home · Tomah, WI
- Wood Aven Health and RehabilitationNursing home · Wausau, WI
Industry payments (Open Payments)
- 2025$153.06 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Otsuka America Pharmaceutical, Inc. | $117.47 | 1 |
| Otsuka Pharmaceutical Development & Commercialization, Inc. | $35.59 | 1 |
What the 2025 payments were for
- Food and Beverage$153.06 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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