Dr. Gregory Allen Thomas, MD
- Medicare services, 2024
- 400
- Medicare patients, 2024
- 155
- Part D claims, 2024
- 659
- Hospital affiliations
- 2
- Industry payments
- $23,865
- Practice address
- 101 Sivley Rd, Huntsville, AL 35801
- Practice phone
- Call (256) 265-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Gregory Allen Thomas is a cardiothoracic surgeon in Huntsville, Alabama
Dr. Thomas practices at Huntsville Hospital in Huntsville, Alabama, part of City of Huntsville, AL.
Dr. Thomas' NPI, 1083624357, was assigned on August 9, 2006. Dr. Thomas graduated from Wayne State University School of Medicine in 1988. Dr. Thomas holds Alabama license 25181.
- NPI
- 1083624357NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3072561737
- NPI enumeration date
- August 9, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (256) 265-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Allen Thomas practices at Huntsville Hospital in Huntsville, Alabama
Dr. Thomas' primary practice is Huntsville Hospital, at 101 Sivley Rd, Huntsville, AL 35801 in Madison County. The practice phone is (256) 265-1000.
- Huntsville Hospital101 Sivley Rd, Huntsville, AL 35801 · Madison CountyPhone(256) 265-1000
Source: Dmand AI Affiliation Data
Dr. Gregory Allen Thomas is affiliated with 3 sites of care and 3 medical groups
Dr. Thomas' primary practice is Huntsville Hospital in Huntsville, Alabama, part of City of Huntsville, AL. Dr. Thomas is also affiliated with Marshall Medical Center South. The medical group on file is UAB Medicine. Dmand AI also links Dr. Thomas to 2 more medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory Allen Thomas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomas practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Huntsville Hospital | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across City of Huntsville, AL and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gregory Allen Thomas is one of 64 cardiothoracic surgeons in Alabama
Thoracic surgery (cardiothoracic vascular surgery) is Dr. Thomas' primary specialty in the NPI Registry, under taxonomy code 208G00000X. Dr. Thomas is licensed in Alabama.
Specialties and state licenses
- Thoracic surgery (cardiothoracic vascular surgery), AlabamaPrimary
Cardiothoracic surgeons near Dr. Thomas
Counts of cardiothoracic surgeons with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory Allen Thomas billed Medicare for 400 services in 2024
CMS data shows 400 Medicare services from Dr. Thomas across 14 procedure codes in 2024, for 155 Medicare patients. Medicare paid $63,415 for them.
Dr. Thomas' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1542024: 25666%
- Surgery
- 2023: 432024: 7472%
- Other services
- 2023: 02024: 36
- Imaging
- 2023: 222024: 3455%
Where Dr. Thomas' Medicare services took place, 2024
- In an office16140%
- In a facility23960%
Dr. Thomas compared with the Alabama median for cardiothoracic surgeons, 2024
- Dr. Thomas
- Alabama median
- Medicare services
- 400vs 1722.3 times
- Medicare patients
- 155vs 10646% above
- Part D claims
- 496vs 608.3 times
Medians across 60 cardiothoracic surgeons in Alabama with Dmand AI profiles that report each measure.
Dr. Thomas' 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. Thomas?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Thomas and other cardiothoracic surgeons in Alabama.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Allen Thomas treated 155 Medicare patients in 2024, average age 75
CMS counts 155 Medicare patients who saw Dr. Thomas in 2024. The largest group is 75 to 84, with 73 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.76, 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. Thomas' median patient age at 73, with 41% women.
Dr. Thomas' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Thomas' Medicare patients by sex, 2024
- Women7750%
- Men7850%
Chronic conditions among Dr. Thomas' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease75%
- Arthritis55%
- Atrial fibrillation43%
- Diabetes43%
- Chronic kidney disease41%
- Heart failure39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Thomas' 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
- Women41%
- Men58%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Allen Thomas wrote 659 Medicare Part D claims in 2024
In 2024, Dr. Thomas wrote 659 Medicare Part D claims for 147 patients. 91% of them were for generic drugs. CMS names the drug for 496 of them, across 18 drugs with 11 or more claims each, at $12,122 in total drug cost. In 2023, CMS named 532 claims across 16 drugs.
Dr. Thomas' Part D claims by kind of drug, 2024
- Generic598 claims91%
- Brand-name and other61 claims9%
Dr. Thomas' most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Thomas' Part D claims, 2024
- Opioids14%93 of 659 claims
- Antibiotics5%32 of 659 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5322024: 4967%
Drugs named by CMS: 18 in 2024, 16 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Gregory Allen Thomas ranks in the 91st percentile for coronary artery bypass graft (cabg) in Medicare
Dr. Thomas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 39 procedures of coronary artery bypass graft (cabg) by Dr. Thomas, more than 91% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Thomas ranks in Medicare procedure volume
- Coronary artery bypass graft (CABG)
- 91st percentile39 procedures
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 47th percentile16 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregory Allen Thomas received $23,865 in industry payments from 2016 to 2025
CMS Open Payments shows 224 general payments to Dr. Thomas from 40 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 32% of the total. Baxter Healthcare paid the most, $8,796.
General payments to Dr. Thomas by program year, 2016 to 2025
General payments to Dr. Thomas by kind, 2016 to 2025
- Food and beverage$7,52932%
- Travel and lodging$7,17830%
- Education$7,10530%
- Consulting fees$2,0288%
- Gifts$250%
Companies that paid Dr. Thomas 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. Gregory Allen Thomas graduated from Wayne State University School of Medicine
Dr. Thomas graduated from Wayne State University School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory Allen Thomas'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) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Gregory Allen Thomas
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. Gregory Allen Thomas' NPI number?
Dr. Gregory Allen Thomas' NPI number is 1083624357. It was assigned on August 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Allen Thomas?
Dr. Gregory Allen Thomas is a cardiothoracic surgeon in Huntsville, Alabama. The primary specialty in the NPI Registry is Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (taxonomy code 208G00000X).
Where does Dr. Gregory Allen Thomas practice?
Dr. Thomas practices at 101 Sivley Rd, Huntsville, AL 35801. Dr. Thomas' primary practice is Huntsville Hospital in Huntsville, Alabama, part of City of Huntsville, AL. Dmand AI also links Dr. Thomas to 2 medical groups and 1 group practice or clinic.
What is Dr. Gregory Allen Thomas' office phone number?
The practice phone on file for Dr. Thomas is (256) 265-1000.
What is Dr. Gregory Allen Thomas' medical license number?
Dr. Thomas holds Alabama license 25181.
Which hospitals is Dr. Gregory Allen Thomas affiliated with?
Dr. Thomas practices at Huntsville Hospital in Huntsville, Alabama. Dr. Thomas is also affiliated with Marshall Medical Center South.
What medical group is Dr. Gregory Allen Thomas part of?
Dr. Thomas is linked to UAB Medicine. Dmand AI links Dr. Thomas to 2 more medical groups.
Does Dr. Gregory Allen Thomas accept Medicare?
Yes. CMS data shows Dr. Thomas billed Medicare for 400 services in 2024, and Dr. Thomas accepts Medicare assignment.
How many Medicare patients does Dr. Gregory Allen Thomas see?
CMS counts 155 Medicare patients who saw Dr. Thomas in 2024, with an average age of 75.
What services does Dr. Gregory Allen Thomas bill to Medicare?
In 2024, Dr. Thomas' most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99232) and medicare service (G2211).
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Where did Dr. Gregory Allen Thomas go to medical school?
Dr. Thomas graduated from Wayne State University School of Medicine in 1988.
What drugs does Dr. Gregory Allen Thomas prescribe most?
In 2024 Medicare Part D data, Dr. Thomas' most prescribed drugs by claims were Metoprolol Tartrate, Furosemide and Potassium Chloride.
Has Dr. Gregory Allen Thomas received payments from drug or device companies?
CMS Open Payments shows $23,865 in general payments to Dr. Thomas from 40 companies from 2016 to 2025. The largest total came from Baxter Healthcare.
How long has Dr. Gregory Allen Thomas been practicing?
Dr. Thomas graduated from medical school in 1988, 38 years ago.
Selling to thoracic surgery (cardiothoracic vascular surgery) practices?
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