John J. Farmer, M. D.
Family Medicine Physician · Madisonville, KY
John J. Farmer, M. D. is a family medicine physician with a practice address in Madisonville, Kentucky, and NPI 1285695866, issued on Mar 31, 2006. Check the license (Kentucky 33965, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- John J. Farmer
- Credential
- M. D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 33965 KY
Self-reported in NPPES; status is on the state search - Practice location
- 444 S Main St, Madisonville, KY 42431
- Phone
- (270) 821-4444
- Enumerated
- Mar 31, 2006
- Record last updated
- May 14, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (270) 821-9188
- Medicaid ID
- 6433965800 KY
- Medicare enrollment
- Enrolled (PECOS I20040927000589); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 1997
- Entity
- Type 1 · individual
Also registered at 444 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Craig Amundson, M. D.Internal Medicine Physician1548221120
- Tammy Barton, P.T.Physical Therapist1558479071
- Tammy Clayton, PA-CPhysician Assistant1629039201
- Eden Elfrink, DOFamily Medicine Physician1841854031
- Tracey Ervin, RPHPharmacist1740587450
- Stacey Fazenbaker, M. D.Family Medicine Physician1487615787
Verify John J. Farmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 33965Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5.9 times the Medicare Part D claims of the average family medicine physician in 2024
20,928 Medicare Part D claims for 937 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 253 claims were for opioids.
Most prescribed
- Atorvastatin Calcium908 claims
- Rosuvastatin Calcium727 claims
- Levothyroxine Sodium701 claims
- Metoprolol Succinate590 claims
- Amlodipine Besylate560 claims
- Furosemide524 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
- Owensboro Health Medical Group IncOwensboro, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
41 family medicine physician records list a practice address in Madisonville
They are 41 of the 685 NPPES records with a practice address in Madisonville, and 1,968 family medicine physician records in Kentucky.
All 41 in Madisonville → All 1,968 in Kentucky → Every provider in Madisonville →
Other family medicine physician records in Kentucky
- Nison Abayev, MDLouisville, KY1124012653
- Sarah Abbeyquaye, D.O.Richmond, KY1477873479
- Lesley Abbott, D.O.Flatwoods, KY1265511315
- Faten Abdullah, M.D.Louisville, KY1467718049
- Matthew Abel, MDNicholasville, KY1639523236
- Mark Abramovich, MDBardstown, KY1528036746
- Cristy Abreu, MDLouisville, KY1740509488
- Victor Acevedo, MDFt Campbell, KY1184695207
- Ashley Adams, D.O.Prestonsburg, KY1821357070
- Brenton Adams, M.D.Louisville, KY1699725762
Common questions
What is John J. Farmer, M. D.'s NPI number?
John J. Farmer, M. D.'s National Provider Identifier (NPI) is 1285695866, issued on Mar 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John J. Farmer, M. D. located?
The NPPES record lists a practice address at 444 S Main St, Madisonville, KY, 42431. Phone: (270) 821-4444. Providers update this record themselves, so call before visiting.
How can I verify John J. Farmer, M. D.'s license?
NPPES lists Kentucky license number 33965, as entered by the provider. Search the Kentucky Board of Medical Licensure at https://web1.ky.gov/GenSearch/LicenseSearch.aspx?AGY=5. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John J. Farmer, M. D. prescribe under Medicare Part D?
In 2024, John J. Farmer, M. D. had 20,928 Medicare Part D claims for 937 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.