Mark W. Hennon, MD
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Buffalo, NY
Mark W. Hennon, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Buffalo, New York, and NPI 1124108998, issued on Oct 16, 2006. Check the license (New York 256860, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Mark W. Hennon
- Credential
- MD
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License numbers
- 256860 NY
MD426092 PA
Self-reported in NPPES; status is on the state search - Practice location
- Elm And Carlton St, Buffalo, NY 14263
- Phone
- (716) 845-2300
- Enumerated
- Oct 16, 2006
- Record last updated
- Feb 24, 2022
- Medicaid ID
- 03226262 NY
- Medicare enrollment
- Enrolled (PECOS I20100825001040); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 446 in New York → Look up another NPI →
Also registered at Elm And Carlton St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Steven Abel, RPHPharmacist1649578113
- Anuja AbhyankarMedical Oncology Physician1679181424
- Sara Abou Azar, M.D.Surgery Physician1689103541
- Tina Agostinelli, PAPhysician Assistant1528621885
- Eric Ahn, MDGastroenterology Physician1134528912
- Christine Aiduk, NPObstetrics & Gynecology Nurse Practitioner1255314555
Verify Mark W. Hennon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 256860Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average thoracic surgery (cardiothoracic vascular surgery) physician in 2024
16 Medicare Part D claims, against an average of 101 among the 2,587 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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
- Roswell Park Cancer InstituteBuffalo, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark W. Hennon among 446 thoracic surgery (cardiothoracic vascular surgery) physician records in New York
Mark W. Hennon, MD is one of 446 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in New York. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 16% of them.
- NPI issued2006 · 16% of these records are older, 50% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2002 · median 1999 among the 294 with a school on file
- Record last updated2022 · 63% 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 New York 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 New York
There are 446 thoracic surgery (cardiothoracic vascular surgery) physician records in New York.
All 446 in New York → Every provider in Buffalo → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Todd Demmy, MDBuffalo, NY 142631720084122
- Elisabeth Dexter, MDBuffalo, NY 142631427007095
- Nathaniel Ivanick, MDBuffalo, NY 142631063623098
- Chukwumere Nwogu, MDBuffalo, NY 142631164403770
- Anthony Picone, MD PHDBuffalo, NY 142631275597338
- Cezar RaiceaBuffalo, NY 142631457751588
- Kenneth Seastedt, M.D.Buffalo, NY 142631912273186
- Saikrishna Yendamuri, MDBuffalo, NY 142631396940995
Common questions
What is Mark W. Hennon, MD's NPI number?
Mark W. Hennon, MD's National Provider Identifier (NPI) is 1124108998, issued on Oct 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark W. Hennon, MD located?
The NPPES record lists a practice address at Elm And Carlton St, Buffalo, NY, 14263. Phone: (716) 845-2300. Providers update this record themselves, so call before visiting.
How can I verify Mark W. Hennon, MD's license?
NPPES lists New York license number 256860, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark W. Hennon, MD prescribe under Medicare Part D?
In 2024, Mark W. Hennon, MD had 16 Medicare Part D claims; the average among thoracic surgery (cardiothoracic vascular surgery) physician prescribers was 101. 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.