AgingAtrophyBolivia
Dr. Gregory S. Thomas, MD
NPI1407834146
- Medicare services, 2021
- 22
- Part D claims, 2021
- 133
- Publications
- 93
- Industry payments
- $127,794
- Affiliated sites
- 1
- Practice address
- 2865 Atlantic Ave Suite 104 Suite 104, Long Beach, CA 90806
- Practice phone
- Call (562) 933-1820
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Adult Multi-Specialty Center - Long Beach
Physician office · Long Beach, California
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Dr. Gregory S. Thomas is a cardiologist in Long Beach, California
Dr. Thomas practices at Adult Multi-Specialty Center - Long Beach in Long Beach, California.
Dr. Thomas' NPI, 1407834146, was assigned on January 4, 2006. Dr. Thomas graduated from UCSF School of Medicine in 1980. Dr. Thomas holds California license G49797.
NPI and contact details
- NPI
- 1407834146NPI Registry (opens in a new tab)
- NPI enumeration date
- January 4, 2006
- NPI status
- Active
- Practice phone
- (562) 933-1820
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 72
- Medical school graduation
- 1980
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Gregory S. Thomas practices at Adult Multi-Specialty Center - Long Beach in Long Beach, California
Dr. Thomas' primary practice is Adult Multi-Specialty Center - Long Beach, at 2865 Atlantic Ave Suite 104 Suite 104, Long Beach, CA 90806. The practice phone is (562) 933-1820.
- Adult Multi-Specialty Center - Long Beach2865 Atlantic Ave Suite 104 Suite 104, Long Beach, CA 90806Phone(562) 933-1820
Source: Dmand AI Affiliation Data
Dr. Gregory S. Thomas is affiliated with 1 site of care
Dr. Thomas' primary practice is Adult Multi-Specialty Center - Long Beach in Long Beach, California.
Adult Multi-Specialty Center - Long BeachPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory S. Thomas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Thomas practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Adult Multi-Specialty Center - Long Beach | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory S. Thomas is one of 2,375 cardiologists in California
Cardiovascular disease is Dr. Thomas' primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Thomas is board certified in cardiovascular disease by the American Board of Internal Medicine. Dr. Thomas is licensed in California.
Specialties and state licenses
- Cardiovascular disease, CaliforniaPrimary
Cardiologists near Dr. Thomas
Counts of cardiologists 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 S. Thomas billed Medicare for 22 services in 2021
CMS data shows 22 Medicare services from Dr. Thomas across 1 procedure code in 2021, all of them office visits. Medicare paid $2,528 for them. Every service was in an office.
Medicare services, 202122
Paid by Medicare$2,528
Procedure codes1
Dr. Thomas' Medicare services by type, 2019 to 2021
- 2019
- 2021
- Office and hospital visits
- 2019: 332021: 2233%
Dr. Thomas compared with the California median for cardiologists, 2021
- Dr. Thomas
- California median
- Medicare services
- 22vs 1,56099% below
- Part D claims
- 133vs 1,41091% below
Medians across 2,237 cardiologists in California with Dmand AI profiles that report each measure.
Dr. Thomas' most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Thomas and other cardiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory S. Thomas' patients have a median age of 81
Across all payers, Dmand AI patient panel data puts Dr. Thomas' median patient age at 81, with 50% women.
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 81
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Gregory S. Thomas wrote 133 Medicare Part D claims in 2021
In 2021, Dr. Thomas wrote 133 Medicare Part D claims. They cover 8 drugs, with $4,955 in total drug cost. In 2020, CMS named 160 claims across 9 drugs.
Part D claims, 2021133
Drugs named by CMS8
Total drug cost$4,955
Dr. Thomas' most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2020 to 2021
- 2020
- 2021
- Claims for drugs CMS names
- 2020: 1602021: 13317%
Drugs named by CMS: 8 in 2021, 9 in 2020.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Gregory S. Thomas has 93 publications on record
Dmand AI links 93 papers to Dr. Thomas, published from 2005 to 2024. 2014 was the busiest year, with 6. The most frequent topics are Tomography, X-Ray Computed, Exercise Test and Myocardial Perfusion Imaging. Dr. Thomas has published most often in J Nucl Cardiol. Dr. Thomas' most frequent co-authors are Michael I. Miyamoto, MD, David Edward Michalik, DO and M. Linda Sutherland, MD.
Papers93
Years published2005 to 2024
Dr. Thomas' papers by year, 2013 to 2024
Topics Dr. Thomas writes about most
- Tomography, X-Ray Computed
- Exercise Test
- Myocardial Perfusion Imaging
- Tomography, Emission-Computed, Single-Photon
- Coronary Artery Disease
- Mummies
- Purines
- Pyrazoles
Dr. Thomas' most frequent co-authors
- Michael I. Miyamoto, MD17 shared papers
- David Edward Michalik, DO9 shared papers
- M. Linda Sutherland, MD7 shared papers
Recent publications by Dr. Thomas
BoliviaCongenital AbnormalitiesSternum
Ann Glob Health
Atrial FibrillationBoliviaFarmers
J Nucl Cardiol
ElectrocardiographyHeartMyocardial Perfusion Imaging
See who Dr. Thomas researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Thomas works with, so you can find a warm path to the right cardiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregory S. Thomas received $127,794 in industry payments from 2016 to 2025
CMS Open Payments shows 146 general payments to Dr. Thomas from 19 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 65% of the total. Astellas Pharma US Inc paid the most, $125,272. It also lists 2 research payments totaling $4,888 in 2016.
General payments to Dr. Thomas by program year, 2016 to 2025
General payments to Dr. Thomas by kind, 2016 to 2025
$127.8Kin total
- Speaker and faculty fees$82,48065%
- Consulting fees$24,02519%
- Travel and lodging$16,40813%
- Food and beverage$4,6924%
- Grants$1900%
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 S. Thomas has 4 awards and honors on record
Dmand AI lists 4 awards for Dr. Thomas, most recently Master, American Society of Nuclear Cardiology in 2015.
Awards and honors for Dr. Thomas
- 2015
- Master, American Society of Nuclear Cardiology
- 2009
- Clinical Professor of Medicine (Cardiology),
- Undated
- ACC Fellow
- Super Doc
Source: Dmand AI Professional Profile Data
Dr. Gregory S. Thomas graduated from UCSF School of Medicine
Dr. Thomas graduated from UCSF School of Medicine in 1980. Dr. Thomas is a member of ACC, ASNC and Society of Cardiovascular Computed Tomography.
- Medical school
- Board certified in cardiovascular disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Gregory S. Thomas accepts plans from 12 insurance carriers
Dr. Thomas is in network with 12 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Aetna
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +4 more carriersWith a free account
Plan types Dr. Thomas accepts, by number of carriers
- PPO9
- HMO6
- Medicare5
- EPO3
- POS2
Source: Dmand AI Insurance Network Data
Sources for Dr. Gregory S. 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 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. Gregory S. 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 S. Thomas' NPI number?
Dr. Gregory S. Thomas' NPI number is 1407834146. It was assigned on January 4, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory S. Thomas?
Dr. Gregory S. Thomas is a cardiologist in Long Beach, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Gregory S. Thomas practice?
Dr. Thomas practices at 2865 Atlantic Ave Suite 104 Suite 104, Long Beach, CA 90806. Dr. Thomas' primary practice is Adult Multi-Specialty Center - Long Beach in Long Beach, California.
What is Dr. Gregory S. Thomas' office phone number?
The practice phone on file for Dr. Thomas is (562) 933-1820.
What is Dr. Gregory S. Thomas' medical license number?
Dr. Thomas holds California license G49797.
Does Dr. Gregory S. Thomas accept Medicare?
Yes. CMS data shows Dr. Thomas billed Medicare for 22 services in 2021.
Is Dr. Gregory S. Thomas board certified?
Yes. Dr. Thomas is board certified in cardiovascular disease by the American Board of Internal Medicine.
What services does Dr. Gregory S. Thomas bill to Medicare?
In 2021, Dr. Thomas' most billed Medicare services were office visit, established patient (99214).
Where did Dr. Gregory S. Thomas go to medical school?
Dr. Thomas graduated from UCSF School of Medicine in 1980.
What drugs does Dr. Gregory S. Thomas prescribe most?
In 2021 Medicare Part D data, Dr. Thomas' most prescribed drugs by claims were Rosuvastatin Calcium, Carvedilol and Lisinopril.
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Has Dr. Gregory S. Thomas received payments from drug or device companies?
CMS Open Payments shows $127,794 in general payments to Dr. Thomas from 19 companies from 2016 to 2025. The largest total came from Astellas Pharma US Inc.
How long has Dr. Gregory S. Thomas been practicing?
Dr. Thomas graduated from medical school in 1980, 46 years ago.
Does Dr. Gregory S. Thomas do research?
Dmand AI links 93 publications to Dr. Thomas, published from 2005 to 2024.
Who does Dr. Gregory S. Thomas publish with?
Dr. Thomas' most frequent co-authors are Michael I. Miyamoto, MD (17 shared papers), David Edward Michalik, DO (9 shared papers) and M. Linda Sutherland, MD (7 shared papers).
What insurance does Dr. Gregory S. Thomas accept?
Dr. Thomas is in network with 12 carriers, including Blue Cross Blue Shield of Michigan, United Healthcare and Elevance. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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