NPPES file of Aug 9, 2026

Keith Allen Dufendach, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Muskegon, MI

Keith Allen Dufendach, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Muskegon, Michigan, and NPI 1821525429, issued on May 15, 2017. Check the license (Michigan 4301513912, as entered in NPPES) on the Michigan Board of Medicine (LARA); the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1821525429
Name
Keith Allen Dufendach
Credential
MD
Primary taxonomy
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
License number
4301513912 MI
Self-reported in NPPES; status is on the state search
Practice location
1560 E Sherman Blvd Ste 309, Muskegon, MI 49444
Phone
(231) 672-8643
Enumerated
May 15, 2017
Record last updated
Jun 3, 2025
Fax
(231) 672-8651
Medicare enrollment
Enrolled (PECOS I20250604000521); accepts Medicare assignment
Medical or professional school
Perelman School Of Med At The University Of Pennsylvania, 2017
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 1560 E Sherman Blvd Ste 309

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Julie Anderson, PA-CSurgical Physician Assistant1114990447
  2. Theodore Boeve, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1225000912
  3. Ryan Bylsma, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1205275765
  4. Meghan Halub, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1821436924
  5. Kristina Nitzsche, PA-CSurgical Physician Assistant1689864795

Verify Keith Allen Dufendach in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMichigan Board of Medicine (LARA)
    Search for license 4301513912    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Michigan license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Industry payments in 2024: $1,074.09

13 payments; by number, the most common kind was food and beverage; the largest payer was Edwards Lifesciences Corporation. 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.

  1. Keith Dufendach$1,074.09
  2. Specialty average$7,828.84

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

  1. Mercy Health Partners Sub-Specialty ServicesMuskegon, MI
  2. Metropolitan HospitalWyoming, MI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician providers in Michigan

There are 208 thoracic surgery (cardiothoracic vascular surgery) physician records in Michigan.

All 208 in Michigan → Every provider in Muskegon →

Other thoracic surgery (cardiothoracic vascular surgery) physician records in Michigan

  1. Ashraf Abou El Ela, MDJackson, MI1609149632
  2. Kumari Adams, M.D.Ypsilanti, MI1134306392
  3. Sanjeev Aggarwal, M.D.Royal Oak, MI1679502066
  4. Gorav Ailawadi, MDAnn Arbor, MI1710196894
  5. Chris Akins, MDPetoskey, MI1164418026
  6. Mamdouh Alahmadi, MDDetroit, MI1164037735
  7. Raed Alnajjar, M.D.Detroit, MI1215107982
  8. Jeffrey Altshuler, MDRoyal Oak, MI1346222379
  9. Miguel Alvelo-Rivera, MDMidland, MI1376514778
  10. Parth Amin, M.D.Kalamazoo, MI1326283730

Common questions

What is Keith Allen Dufendach, MD's NPI number?

Keith Allen Dufendach, MD's National Provider Identifier (NPI) is 1821525429, issued on May 15, 2017. An NPI identifies a provider in billing; it is not a license.

Where is Keith Allen Dufendach, MD located?

The NPPES record lists a practice address at 1560 E Sherman Blvd Ste 309, Muskegon, MI, 49444. Phone: (231) 672-8643. Providers update this record themselves, so call before visiting.

How can I verify Keith Allen Dufendach, MD's license?

NPPES lists Michigan license number 4301513912, as entered by the provider. Search the Michigan Board of Medicine (LARA) at https://aca-prod.accela.com/MILARA/GeneralProperty/PropertyLookUp.aspx?isLicensee=Y&TabName=APO. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.