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Dr. Gary S. Allen, MD
NPI1154327872PAC ID3274508908
- Medicare services, 2024
- 28
- Medicare patients, 2024
- 29
- Publications
- 9
- MIPS score, 2024
- 80
- Hospital affiliations
- 2
- Practice address
- 1000 Waterman Way, Tavares, FL 32778
- Practice phone
- Call (352) 253-3368
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Allen's professional email, personal email and mobile number
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Dr. Gary S. Allen is a cardiothoracic surgeon in Tavares, Florida
Dr. Allen practices at AdventHealth Waterman in Tavares, Florida, part of AdventHealth.
Dr. Allen's NPI, 1154327872, was assigned on June 27, 2005. Dr. Allen graduated from Albany Medical College in 1991. Dr. Allen holds Florida license ME80476.
NPI and contact details
- NPI
- 1154327872NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274508908
- NPI enumeration date
- June 27, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (352) 253-3368
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gary S. Allen practices at AdventHealth Waterman in Tavares, Florida
Dr. Allen's primary practice is AdventHealth Waterman, at 1000 Waterman Way, Tavares, FL 32778 in Lake County. The practice phone is (352) 253-3368.
- AdventHealth Waterman1000 Waterman Way, Tavares, FL 32778 · Lake CountyPhone(352) 253-3368
Source: Dmand AI Affiliation Data
Dr. Gary S. Allen is affiliated with 5 sites of care and 4 medical groups
Dr. Allen's primary practice is AdventHealth Waterman in Tavares, Florida, part of AdventHealth. The medical group on file is AdventHealth Medical Group. Dmand AI also links Dr. Allen to 1 more hospital, 3 medical groups, 2 group practices and clinics and 1 hospice, each named with a free account.
AdventHealth Medical Group1 hospitalName with a free account3 medical groupsNames with a free account2 group practices and clinicsNames with a free account1 hospiceName with a free account
See all 9 affiliations for Dr. AllenSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gary S. Allen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Allen practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| AdventHealth Waterman | Available with a free account |
| +4 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gary S. Allen is one of 418 cardiothoracic surgeons in Florida
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Allen's primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Allen is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery. Dmand AI has Dr. Allen's licenses on file in 4 states: Florida, Colorado, Texas and Utah.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), FloridaPrimary
- Colorado license
- Texas license
- Utah license
Clinical focus
Dmand AI lists heart bypass surgery and heart valve surgery among the conditions Dr. Allen treats.
Cardiothoracic surgeons near Dr. Allen
Counts of cardiothoracic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
418cardiothoracic surgeons in Florida
3cardiothoracic surgeons in Tavares
3cardiothoracic surgeons at AdventHealth WatermanSources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gary S. Allen billed Medicare for 28 services in 2024
CMS data shows 28 Medicare services from Dr. Allen across 2 procedure codes in 2024, for 29 Medicare patients. Medicare paid $25,020 for them.
Medicare services, 202428
Medicare patients29
Paid by Medicare$25,020
Procedure codes2
Dr. Allen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Surgery
- 2023: 682024: 1775%
- Office and hospital visits
- 2023: 882024: 1188%
Where Dr. Allen's Medicare services took place, 2024
- In an office1139%
- In a facility1761%
Dr. Allen compared with the Florida median for cardiothoracic surgeons, 2024
- Dr. Allen
- Florida median
- Medicare services
- 28vs 15982% below
- Medicare patients
- 29vs 11074% below
Medians across 347 cardiothoracic surgeons in Florida with Dmand AI profiles that report each measure.
Dr. Allen's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Allen?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Allen and other cardiothoracic surgeons in Florida.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gary S. Allen treated 29 Medicare patients in 2024, average age 76
CMS counts 29 Medicare patients who saw Dr. Allen in 2024. The largest group is 65 to 74, with 13 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.67, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Allen's median patient age at 73, with 37% women.
Medicare patients, 202429
Average age76
Average risk score1.67
Dr. Allen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Allen's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Atrial fibrillation72%
- Arthritis62%
- Diabetes55%
- Heart failure55%
- Chronic kidney disease52%
Share of Medicare patients with each condition. A patient can have several.
Dr. Allen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women37%
- Men62%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gary S. Allen scored 80 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 80 out of 100 for Dr. Allen for performance year 2024, reported as part of a group. Dr. Allen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 34 procedures of coronary artery bypass graft (cabg) by Dr. Allen, more than 87% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Allen's MIPS scores, performance year 2024
- 80of 100Final score
- 61.2of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 72of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Allen ranks in Medicare procedure volume
- Coronary artery bypass graft (CABG)
- 87th percentile34 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
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Dr. Gary S. Allen has 9 publications on record
Dmand AI links 9 papers to Dr. Allen in 2017. The most frequent topics are Wounds, Nonpenetrating, Contusions and Diagnosis, Differential. Dr. Allen has published most often in J Am Coll Surg. Dr. Allen's most frequent co-authors are Charles Samuel Cox, MD, Frederick A. Moore, FACS, MD and Richard J. Andrassy, MD.
Papers9
Topics Dr. Allen writes about most
- Wounds, Nonpenetrating
- Contusions
- Diagnosis, Differential
- Injury Severity Score
- Lung Injury
- Postoperative Complications
- Respiration, Artificial
- Thoracic Injuries
Dr. Allen's most frequent co-authors
- Charles Samuel Cox, MD4 shared papers
- Frederick A. Moore, FACS, MD4 shared papers
- Richard J. Andrassy, MD1 shared paper
Recent publications by Dr. Allen
Biomechanical PhenomenaHemodynamicsInjury Severity Score
Abdominal InjuriesDiagnosis, DifferentialMultiple Trauma
J Pediatr Surg
AnestheticsChi-Square DistributionHernia, Inguinal
See who Dr. Allen researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Allen works with, so you can find a warm path to the right cardiothoracic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gary S. Allen received $65,177 in industry payments from 2016 to 2025
CMS Open Payments shows 284 general payments to Dr. Allen from 39 drug and device companies from 2016 to 2025. Education make up the largest share, 53% of the total. Intuitive Surgical, Inc. paid the most, $42,603.
General payments to Dr. Allen by program year, 2016 to 2025
General payments to Dr. Allen by kind, 2016 to 2025
$65.2Kin total
- Education$34,50053%
- Food and beverage$13,57921%
- Consulting fees$8,50013%
- Travel and lodging$7,29811%
- Speaker and faculty fees$1,3002%
Companies that paid Dr. Allen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gary S. Allen has 1 award and honors on record
Dmand AI lists 1 award for Dr. Allen.
Awards and honors for Dr. Allen
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Gary S. Allen graduated from Albany Medical College
Dr. Allen graduated from Albany Medical College in 1991. Dr. Allen is a member of ACS.
- Medical school
- Board certified in thoracic and cardiac surgery
Source: Dmand AI Professional Profile Data
Dr. Gary S. Allen accepts plans from 17 insurance carriers
Dr. Allen is in network with 17 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Excellus BlueCross BlueShield
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Cigna
- HCSC
- Aspirus Health Plan
- +9 more carriersWith a free account
Plan types Dr. Allen accepts, by number of carriers
- PPO12
- Medicare10
- HMO9
- POS6
- EPO5
Source: Dmand AI Insurance Network Data
Sources for Dr. Gary S. Allen's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gary S. Allen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gary S. Allen's NPI number?
Dr. Gary S. Allen's NPI number is 1154327872. It was assigned on June 27, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gary S. Allen?
Dr. Gary S. Allen is a cardiothoracic surgeon in Tavares, Florida. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Gary S. Allen practice?
Dr. Allen practices at 1000 Waterman Way, Tavares, FL 32778. Dr. Allen's primary practice is AdventHealth Waterman in Tavares, Florida, part of AdventHealth. Dmand AI also links Dr. Allen to 1 hospital, 3 medical groups, 2 group practices and clinics and 1 hospice.
What is Dr. Gary S. Allen's office phone number?
The practice phone on file for Dr. Allen is (352) 253-3368.
What is Dr. Gary S. Allen's medical license number?
Dr. Allen holds Florida license ME80476, one of the licenses on file in 4 states.
Which states has Dr. Gary S. Allen been licensed in?
Dmand AI has state licenses on file for Dr. Allen in Florida (2000 to 2027), Colorado (2024 to 2027), Texas (1996 to 2003) and Utah (1993 to 2002).
Which hospitals is Dr. Gary S. Allen affiliated with?
Dr. Allen practices at AdventHealth Waterman in Tavares, Florida. Dmand AI links Dr. Allen to 1 more hospital.
What medical group is Dr. Gary S. Allen part of?
Dr. Allen is linked to AdventHealth Medical Group. Dmand AI links Dr. Allen to 3 more medical groups.
Does Dr. Gary S. Allen accept Medicare?
Yes. CMS data shows Dr. Allen billed Medicare for 28 services in 2024, and Dr. Allen accepts Medicare assignment.
What is Dr. Gary S. Allen's MIPS score?
Dr. Allen's MIPS final score for performance year 2024 is 80 out of 100, reported as part of a group.
Show 9 more questionsShow fewer questions
How many Medicare patients does Dr. Gary S. Allen see?
CMS counts 29 Medicare patients who saw Dr. Allen in 2024, with an average age of 76.
Is Dr. Gary S. Allen board certified?
Yes. Dr. Allen is board certified in thoracic and cardiac surgery by the American Board of Thoracic Surgery.
What services does Dr. Gary S. Allen bill to Medicare?
In 2024, Dr. Allen's most billed Medicare services were surgery: heart and blood vessels (33533) and office visit, new patient (99204).
Where did Dr. Gary S. Allen go to medical school?
Dr. Allen graduated from Albany Medical College in 1991.
Has Dr. Gary S. Allen received payments from drug or device companies?
CMS Open Payments shows $65,177 in general payments to Dr. Allen from 39 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Gary S. Allen been practicing?
Dr. Allen graduated from medical school in 1991, 35 years ago.
Does Dr. Gary S. Allen do research?
Dmand AI links 9 publications to Dr. Allen.
Who does Dr. Gary S. Allen publish with?
Dr. Allen's most frequent co-authors are Charles Samuel Cox, MD (4 shared papers), Frederick A. Moore, FACS, MD (4 shared papers) and Richard J. Andrassy, MD (1 shared paper).
What insurance does Dr. Gary S. Allen accept?
Dr. Allen is in network with 17 carriers, including Aetna, Elevance and Excellus BlueCross BlueShield. PPO plans come from the most carriers, 12. Check the plan with the practice before a visit.
Selling to thoracic surgery (cardiothoracic vascular surgery) practices?
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