John Gregory Markley, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Columbia, MO
John Gregory Markley, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Columbia, Missouri, and NPI 1932190980, issued on Oct 31, 2005. Check the license (Missouri 2002023140, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- John Gregory Markley
- Credential
- M.D.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License numbers
- 2002023140 MO
G85299 CA
34541-020 WI
Self-reported in NPPES; status is on the state search - Practice location
- One Hospital Dr, Columbia, MO 65212
- Phone
- (573) 882-6955
- Enumerated
- Oct 31, 2005
- Record last updated
- Mar 29, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (573) 884-0437
- Medicaid ID
- 206064404 MO
- Medicare enrollment
- Enrolled (PECOS I20070606000101); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 1992
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 143 in Missouri → Look up another NPI →
Also registered at One 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 Gregory Markley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2002023140Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
17 Medicare Part D claims, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D.
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,945.44
23 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 4,047 providers of this specialty with any payment received $7,828.84 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 one group practice
- The Curators OF The University OF MissouriColumbia, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Gregory Markley among 143 thoracic surgery (cardiothoracic vascular surgery) physician records in Missouri
John Gregory Markley, M.D. is one of 143 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in Missouri. 76% 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, 89% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1992 · median 1997 among the 90 with a school on file
- Record last updated2018 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208G00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Missouri
There are 143 thoracic surgery (cardiothoracic vascular surgery) physician records in Missouri.
All 143 in Missouri → Every provider in Columbia → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Normand Caron, MDColumbia, MO 652121609813344
- Jussuf Kaifi, M.D.Columbia, MO 652121144555723
- Krithika RamaprabhuColumbia, MO 652121215570866
- Sebastian Wiesemann, M.D.Columbia, MO 652121669955001
- William See, MDColumbia, MO 652021477554301
- Joss Fernandez, M.D.Columbia, MO 652011235173642
- Richard Mellitt, M.D.Columbia, MO 652011730171026
- Andrew Rich, MDColumbia, MO 652011710976410
Common questions
What is John Gregory Markley, M.D.'s NPI number?
John Gregory Markley, M.D.'s National Provider Identifier (NPI) is 1932190980, issued on Oct 31, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Gregory Markley, M.D. located?
The NPPES record lists a practice address at One Hospital Dr, Columbia, MO, 65212. Phone: (573) 882-6955. Providers update this record themselves, so call before visiting.
How can I verify John Gregory Markley, M.D.'s license?
NPPES lists Missouri license number 2002023140, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Gregory Markley, M.D. prescribe under Medicare Part D?
In 2024, John Gregory Markley, M.D. had 17 Medicare Part D claims; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. Part D covers Medicare prescriptions only.
What is John Gregory Markley, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.