Christopher T. Grennan, MD
NPI 1952620270ActiveIndividual· Family Medicine· Wamego, KS
Family Medicine (MD) in Wamego, Kansas, trained at University of Kansas School of Med (Kc/Wich/Sal) (class of 2010). Their prescriptions cost Medicare Part D more than their services did: $306,228 for 5,174 claims, against $147,356 paid for services in 2024.
Overview
| NPI | 1952620270 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 26, 2010 |
| Last updated in NPPES | Feb 12, 2026 |
| Certified by provider | Feb 12, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 04-35075 | KS |
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 - Family Practice (KS) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 321 |
|---|---|
| Services billed | 3,833 across 71 procedure codes |
| Paid by Medicare | $147,356 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,174 · 11,828 30-day fills |
|---|---|
| Patients | 341 |
| Total drug cost | $306,228 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of Kansas School of Med (Kc/Wich/Sal) |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Family Practice |
| Telehealth | Offers telehealth |
Medical group
- Cotton-O'Neil Clinic Revocable TrustTopeka, KS · 666 clinicians
Hospital affiliations
- Ascension Via Christi Hospital Manhattan, IncManhattan, KS
- Stormont Vail Health Flint Hills, LLCJunction City, KS
- Stormont Vail HospitalTopeka, KS
- Wamego Health CenterWamego, KS
Other facilities
- Meadowlark Hills Home HealthHome health agency · Manhattan, KS
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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