John Austin Kirby, M.D.
Internal Medicine Physician · Jefferson City, TN
John Austin Kirby, M.D. is an internal medicine physician with a practice address in Jefferson City, Tennessee, and NPI 1275539835, issued on Jun 28, 2005. Check the license (Tennessee 35319, as entered in NPPES) on the Tennessee Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John Austin Kirby
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 35319 TN
Self-reported in NPPES; status is on the state search - Practice location
- 120 Hospital Dr, Jefferson City, TN 37760
- Phone
- (865) 475-4742
- Enumerated
- Jun 28, 2005
- Record last updated
- Sep 27, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (865) 262-0100
- Medicare enrollment
- Enrolled (PECOS I20070705000660); accepts Medicare assignment
- Medical or professional school
- Emory University School Of Medicine, 1997
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,596 in Tennessee → Look up another NPI →
Also registered at 120 Hospital Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Austin Kirby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTennessee Board of Medical Examiners
Search for license 35319Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average internal medicine physician in 2024
9,310 Medicare Part D claims for 551 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 184 claims were for opioids.
Most prescribed
- Atorvastatin Calcium438 claims
- Lisinopril397 claims
- Amlodipine Besylate332 claims
- Levothyroxine Sodium290 claims
- Omeprazole251 claims
- Rosuvastatin Calcium232 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.
Industry payments in 2024: $361.33
22 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Summit Medical Group, PLLCKnoxville, TN
- Volunteer Healthcare Services, Inc.Morristown, TN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Austin Kirby among 2,596 internal medicine physician records in Tennessee
John Austin Kirby, M.D. is one of 2,596 internal medicine physician records with a practice address in Tennessee. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 85% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1997 · median 2003 among the 1,705 with a school on file
- Record last updated2012 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Tennessee practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 internal medicine physician records list a practice address in Jefferson City
They are 11 of the 245 NPPES records with a practice address in Jefferson City, and 2,596 internal medicine physician records in Tennessee.
All 2,596 in Tennessee → Every provider in Jefferson City → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Madison Boles, MDJefferson City, TN 377601467071969
- Richard Carter, MDJefferson City, TN 377601508065269
- Melissa Cooley, M.D.Jefferson City, TN 377601851501670
- Douglas Damron, M.D.Jefferson City, TN 377601396785317
- Stephen Gantte, M.D.Jefferson City, TN 377601518963255
- Mathew Kraus, M.D.Jefferson City, TN 377601235178047
- Lance Patton, M.D.Jefferson City, TN 377601104822816
- William Ramsey, M.D.Jefferson City, TN 377601083611412
Common questions
What is John Austin Kirby, M.D.'s NPI number?
John Austin Kirby, M.D.'s National Provider Identifier (NPI) is 1275539835, issued on Jun 28, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Austin Kirby, M.D. located?
The NPPES record lists a practice address at 120 Hospital Dr, Jefferson City, TN, 37760. Phone: (865) 475-4742. Providers update this record themselves, so call before visiting.
How can I verify John Austin Kirby, M.D.'s license?
NPPES lists Tennessee license number 35319, as entered by the provider. Search the Tennessee Board of Medical Examiners at https://www.tn.gov/health/licensure/me.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Austin Kirby, M.D. prescribe under Medicare Part D?
In 2024, John Austin Kirby, M.D. had 9,310 Medicare Part D claims for 551 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.