Gary S. Allen, M.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Littleton, CO
Gary S. Allen, M.D. is a thoracic surgery (cardiothoracic vascular surgery) physician with a practice address in Littleton, Colorado, and NPI 1154327872, issued on Jun 27, 2005. Check the license (Colorado DR.0073193, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gary S. Allen
- Credential
- M.D.
- Primary taxonomy
- Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician 208G00000X
- License numbers
- DR.0073193 CO
ME80476 FL
Self-reported in NPPES; status is on the state search - Practice location
- 7780 S Broadway Ste 170, Littleton, CO 80122
- Phone
- (303) 269-2920
- Enumerated
- Jun 27, 2005
- Record last updated
- Dec 10, 2025
- Fax
- (303) 269-2921
- Medicaid ID
- 258936200 FL
- Medicare enrollment
- Enrolled (PECOS I20040826001439); accepts Medicare assignment
- Medical or professional school
- Albany Medical College Of Union University, 1991
- Entity
- Type 1 · individual
8 nearest thoracic surgery (cardiothoracic vascular surgery) physician records → All 87 in Colorado → Look up another NPI →
Also registered at 7780 S Broadway Ste 170
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Michael Coady, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1427094267
- Bradley Eigsti, PTPhysical Therapist1598754434
- Kevin Miller, M.D.Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician1679579551
- Jeffrey Milliken, MDThoracic Surgery (Cardiothoracic Vascular Surgery) Physician1033299292
- Samantha Parsons, PA-CPhysician Assistant1821527268
Verify Gary S. Allen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0073193Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $7,320.45
42 payments; by number, the most common kind was food and beverage; the largest payer was Intuitive Surgical, 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 3 group practices
- Florida Hospital Healthcare Partners, IncTavares, FL
- Florida Hospital Medical Group IncMaitland, FL
- Portercare Adventist Health SystemDenver, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gary S. Allen among 87 thoracic surgery (cardiothoracic vascular surgery) physician records in Colorado
Gary S. Allen, M.D. is one of 87 thoracic surgery (cardiothoracic vascular surgery) physician records with a practice address in Colorado. 78% 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 · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1991 · median 2000 among the 58 with a school on file
- Record last updated2025 · 53% 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 Colorado 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 Colorado
There are 87 thoracic surgery (cardiothoracic vascular surgery) physician records in Colorado.
All 87 in Colorado → Every provider in Littleton → Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician nationwide →
The 8 thoracic surgery (cardiothoracic vascular surgery) physician records with the nearest ZIP codes
- Michael Coady, MDLittleton, CO 801221427094267
- Kevin Miller, M.D.Littleton, CO 801221679579551
- Jeffrey Milliken, MDLittleton, CO 801221033299292
- Robert Hardesty, M.D.Highlands Ranch, CO 801261881929545
- Boris Sepesi, M.D.Englewood, CO 801131639182785
- Muhammad Aftab, M.B.,B,S, MDAurora, CO 800451336380088
- Michael CainAurora, CO 800451952797789
- Elizabeth David, M.D.Aurora, CO 800451578714333
Common questions
What is Gary S. Allen, M.D.'s NPI number?
Gary S. Allen, M.D.'s National Provider Identifier (NPI) is 1154327872, issued on Jun 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gary S. Allen, M.D. located?
The NPPES record lists a practice address at 7780 S Broadway Ste 170, Littleton, CO, 80122. Phone: (303) 269-2920. Providers update this record themselves, so call before visiting.
How can I verify Gary S. Allen, M.D.'s license?
NPPES lists Colorado license number DR.0073193, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. 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.
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.