Christopher T. Grennan, MD
Family Medicine Physician · Wamego, KS
Christopher T. Grennan, MD is a family medicine physician with a practice address in Wamego, Kansas, and NPI 1952620270, issued on May 26, 2010. Check the license (Kansas 04-35075, as entered in NPPES) on the Kansas State Board of Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Christopher T. Grennan
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 04-35075 KS
Self-reported in NPPES; status is on the state search - Practice location
- 1704 Commercial Cir, Wamego, KS 66547
- Phone
- (785) 456-2207
- Enumerated
- May 26, 2010
- Record last updated
- Feb 12, 2026
- Medicaid ID
- 201084510A KS
- Medicare enrollment
- Enrolled (PECOS I20130912000809); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1704 Commercial Cir
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bradley Cutting, MDFamily Medicine Physician1639214463
- Michael Guhr, PA-CPhysician Assistant1487675971
- Julia Hammett, ARNPNurse Practitioner1982717427
- Diana Katt, MDFamily Medicine Physician1225082712
- Charles Radmer, D.O.Family Medicine Physician1275614356
- Ginger Ruhnke, APRNNurse Practitioner1871138388
Verify Christopher T. Grennan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKansas State Board of Healing Arts
Search for license 04-35075Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% more Medicare Part D claims than the average family medicine physician in 2024
5,174 Medicare Part D claims for 341 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 142 claims were for opioids.
Most prescribed
- Levothyroxine Sodium318 claims
- Amlodipine Besylate233 claims
- Atorvastatin Calcium206 claims
- Lisinopril201 claims
- Losartan Potassium179 claims
- Omeprazole170 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Cotton-O'Neil Clinic Revocable TrustWamego, KS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
8 family medicine physician records list a practice address in Wamego
They are 8 of the 85 NPPES records with a practice address in Wamego, and 1,970 family medicine physician records in Kansas.
All 8 in Wamego → All 1,970 in Kansas → Every provider in Wamego →
Other family medicine physician records in Kansas
- Gregory Abbott, DOWichita, KS1588644165
- Rebekah Abbott, D.O.Overland Park, KS1245571694
- Jill Ackerman, M.D.Merriam, KS1386616621
- Kristin Adams, MDShawnee Mission, KS1023646346
- Delaina Adcox, APRNKansas City, KS1164028239
- Valentine Agbor, DO, PHDKansas City, KS1649064742
- Brenda Aguirre Apodaca, MDWichita, KS1295550481
- Babar Ahmed, MDTopeka, KS1285627323
- Lubna Ahmed, MDSalina, KS1689845216
- Scott Akers, DOWichita, KS1982965851
Common questions
What is Christopher T. Grennan, MD's NPI number?
Christopher T. Grennan, MD's National Provider Identifier (NPI) is 1952620270, issued on May 26, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Christopher T. Grennan, MD located?
The NPPES record lists a practice address at 1704 Commercial Cir, Wamego, KS, 66547. Phone: (785) 456-2207. Providers update this record themselves, so call before visiting.
How can I verify Christopher T. Grennan, MD's license?
NPPES lists Kansas license number 04-35075, as entered by the provider. Search the Kansas State Board of Healing Arts at https://www.ksbha.ks.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Christopher T. Grennan, MD prescribe under Medicare Part D?
In 2024, Christopher T. Grennan, MD had 5,174 Medicare Part D claims for 341 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.