NPPES file of Aug 9, 2026

Michael Dory Horowitz, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Smyrna, GA

Michael Dory Horowitz, MD is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Smyrna, Georgia, and NPI 1821330663, issued on Mar 19, 2013. Check the license (Georgia 54431, as entered in NPPES) on the Georgia Composite Medical Board; 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
1821330663
Name
Michael Dory Horowitz
Credential
MD
Primary taxonomy
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
License number
54431 GA
Self-reported in NPPES; status is on the state search
Practice location
3465 Harlan Dr SE, Smyrna, GA 30080
Phone
(678) 469-1154
Enumerated
Mar 19, 2013
Record last updated
Sep 5, 2016 (not updated in 10 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 155 in Georgia → Look up another NPI →

Verify Michael Dory Horowitz in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersGeorgia Composite Medical Board
    Search for license 54431    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 Georgia license search

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Industry payments in 2024: $37.48

1 payment: food and beverage; the largest payer was Inspire Medical Systems, 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.

  1. Michael Horowitz$37.48
  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.

Michael Dory Horowitz among 155 thoracic surgery (cardiothoracic vascular surgery) physician records in Georgia

Michael Dory Horowitz, MD is one of 155 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in Georgia. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 79% of them.

  • NPI issued2013 · 79% of these records are older, 17% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 72% of these records are
  • Record last updated2016 · 58% 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 Georgia 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 Georgia

There are 155 thoracic surgery (cardiothoracic vascular surgery) physician records in Georgia.

All 155 in Georgia → Every provider in Smyrna → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →

The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes

  1. Theolyn Price, MDRoswell, GA 300761265402317
  2. Hossein Ramadan, MDMarietta, GA 300621215453055
  3. Jeremiah Blair, PAMarietta, GA 300601922640739
  4. Daniel Fortes, M.D.Marietta, GA 300601124037486
  5. Ki Wan Kim, MDMarietta, GA 300601356490734
  6. Theresa Luu, M.D.Marietta, GA 300601831377092
  7. William Mayfield, M.D.Marietta, GA 300601780666719
  8. Daniel Miller, M.D.Marietta, GA 300601831288430

Common questions

What is Michael Dory Horowitz, MD's NPI number?

Michael Dory Horowitz, MD's National Provider Identifier (NPI) is 1821330663, issued on Mar 19, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Michael Dory Horowitz, MD located?

The NPPES record lists a practice address at 3465 Harlan Dr SE, Smyrna, GA, 30080. Phone: (678) 469-1154. Providers update this record themselves, so call before visiting.

How can I verify Michael Dory Horowitz, MD's license?

NPPES lists Georgia license number 54431, as entered by the provider. Search the Georgia Composite Medical Board at https://medicalboard.georgia.gov/. 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.