J Community Hosp Intern Med Perspect
Dr. Gregory Thomas Bismack, MD
NPI1619293149PAC ID2466604921
- Medicare services, 2024
- 1,050
- Medicare patients, 2024
- 409
- Part D claims, 2024
- 571
- Publications
- 1
- Hospital affiliations
- 6
- Practice address
- 1015 Bowles, Fenton, MO 63026
- Practice phone
- Call (636) 496-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Bismack's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory Thomas Bismack is an internist in Fenton, Missouri
Dr. Bismack practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care.
Dr. Bismack's NPI, 1619293149, was assigned on April 8, 2010. Dr. Bismack graduated from Wayne State University School of Medicine in 2010. Dr. Bismack holds Illinois license 036.155470.
NPI and contact details
- NPI
- 1619293149NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2466604921
- NPI enumeration date
- April 8, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (636) 496-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Thomas Bismack practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri
Dr. Bismack's primary practice is SSM Health St. Clare Hospital - Fenton, at 1015 Bowles, Fenton, MO 63026 in Jefferson County. The practice phone is (636) 496-2000.
- SSM Health St. Clare Hospital - Fenton1015 Bowles, Fenton, MO 63026 · Jefferson CountyPhone(636) 496-2000
Source: Dmand AI Affiliation Data
Dr. Gregory Thomas Bismack is affiliated with 9 sites of care and 9 medical groups
Dr. Bismack's primary practice is SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care. Dr. Bismack is also affiliated with HSHS St. Elizabeth's Hospital. The medical group on file is Vituity. Dmand AI also links Dr. Bismack to 4 more hospitals, 8 medical groups, 1 group practice or clinic, 1 hospital outpatient department and 1 skilled nursing facility, each named with a free account.
HSHS St. Elizabeth's HospitalVituity4 hospitalsNames with a free account8 medical groupsNames with a free account1 group practice or clinicName with a free account1 hospital outpatient departmentName with a free account1 skilled nursing facilityName with a free account
See all 18 affiliations for Dr. BismackSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory Thomas Bismack's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Bismack practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health St. Clare Hospital - Fenton | Available with a free account |
| +8 more sites and 8 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Thomas Bismack is one of 2,114 internists in Missouri
Internal medicine is Dr. Bismack's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Bismack's licenses on file in 2 states: Illinois and Michigan.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
- Michigan license
Internists near Dr. Bismack
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
2,114internists in Missouri31internists in Fenton13internists at SSM Health St. Clare Hospital - Fenton
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory Thomas Bismack billed Medicare for 1,050 services in 2024
CMS data shows 1,050 Medicare services from Dr. Bismack across 6 procedure codes in 2024, for 409 Medicare patients. Medicare paid $92,766 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 20241,050
Medicare patients409
Paid by Medicare$92,766
Procedure codes6
Dr. Bismack's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1062024: 1,0505%
Dr. Bismack compared with the Missouri median for internists, 2024
- Dr. Bismack
- Missouri median
- Medicare services
- 1,050vs 53098% above
- Medicare patients
- 409vs 21194% above
- Part D claims
- 301vs 3257% below
Medians across 2,076 internists in Missouri with Dmand AI profiles that report each measure.
Dr. Bismack'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. Bismack?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Bismack and other internists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Thomas Bismack treated 409 Medicare patients in 2024, average age 75
CMS counts 409 Medicare patients who saw Dr. Bismack in 2024. The largest group is 75 to 84, with 143 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 2.58, 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. Bismack's median patient age at 75, with 55% women.
Medicare patients, 2024409
Average age75
Average risk score2.58
Also on Medicaid23%
Dr. Bismack's Medicare patients by age, 2024
Dr. Bismack's Medicare patients by sex, 2024
- Women24560%
- Men16440%
Chronic conditions among Dr. Bismack's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis61%
- Heart failure55%
- Chronic kidney disease54%
- Ischemic heart disease50%
- Mood disorders50%
- Depression48%
Share of Medicare patients with each condition. A patient can have several.
Dr. Bismack's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory Thomas Bismack wrote 571 Medicare Part D claims in 2024
In 2024, Dr. Bismack wrote 571 Medicare Part D claims for 241 patients. 85% of them were for generic drugs. CMS names the drug for 301 of them, across 14 drugs with 11 or more claims each, at $22,243 in total drug cost. In 2023, CMS named 294 claims across 13 drugs.
Part D claims, 2024571
Drugs named by CMS14
Total drug cost$22,243
Part D patients241
Dr. Bismack's Part D claims by kind of drug, 2024
- Generic483 claims85%
- Brand-name88 claims15%
Dr. Bismack's 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. Bismack's Part D claims, 2024
- Opioids6%34 of 571 claims
- Antibiotics17%95 of 571 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: 2942024: 3012%
Drugs named by CMS: 14 in 2024, 13 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
How Dr. Gregory Thomas Bismack takes part in Medicare
Dr. Bismack accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gregory Thomas Bismack has 1 publication on record
Dmand AI links 1 paper to Dr. Bismack in 2016. Dr. Bismack's most frequent co-author is Nazish Khurram, MD.
Papers1
Dr. Bismack's most frequent co-authors
Recent publications by Dr. Bismack
See who Dr. Bismack researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Bismack works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregory Thomas Bismack received $178 in industry payments from 2020 to 2025
CMS Open Payments shows 4 general payments to Dr. Bismack from 3 drug and device companies from 2020 to 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $119.
General payments to Dr. Bismack by program year, 2020 to 2025
Companies that paid Dr. Bismack the most, 2020 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gregory Thomas Bismack graduated from Wayne State University School of Medicine
Dr. Bismack graduated from Wayne State University School of Medicine in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory Thomas Bismack'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) |
| 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) |
| 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 Thomas Bismack
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 Thomas Bismack's NPI number?
Dr. Gregory Thomas Bismack's NPI number is 1619293149. It was assigned on April 8, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Thomas Bismack?
Dr. Gregory Thomas Bismack is an internist in Fenton, Missouri. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gregory Thomas Bismack practice?
Dr. Bismack practices at 1015 Bowles, Fenton, MO 63026. Dr. Bismack's primary practice is SSM Health St. Clare Hospital - Fenton in Fenton, Missouri, part of SSM Health Care. Dmand AI also links Dr. Bismack to 4 hospitals, 8 medical groups, 1 group practice or clinic, 1 hospital outpatient department and 1 skilled nursing facility.
What is Dr. Gregory Thomas Bismack's office phone number?
The practice phone on file for Dr. Bismack is (636) 496-2000.
What is Dr. Gregory Thomas Bismack's medical license number?
Dr. Bismack holds Illinois license 036.155470, one of the licenses on file in 2 states.
Which states has Dr. Gregory Thomas Bismack been licensed in?
Dmand AI has state licenses on file for Dr. Bismack in Illinois and Michigan.
Which hospitals is Dr. Gregory Thomas Bismack affiliated with?
Dr. Bismack practices at SSM Health St. Clare Hospital - Fenton in Fenton, Missouri. Dr. Bismack is also affiliated with HSHS St. Elizabeth's Hospital. Dmand AI links Dr. Bismack to 4 more hospitals.
What medical group is Dr. Gregory Thomas Bismack part of?
Dr. Bismack is linked to Vituity. Dmand AI links Dr. Bismack to 8 more medical groups.
Does Dr. Gregory Thomas Bismack accept Medicare?
Yes. CMS data shows Dr. Bismack billed Medicare for 1,050 services in 2024, and Dr. Bismack accepts Medicare assignment.
How many Medicare patients does Dr. Gregory Thomas Bismack see?
CMS counts 409 Medicare patients who saw Dr. Bismack in 2024, with an average age of 75.
Show 7 more questionsShow fewer questions
What services does Dr. Gregory Thomas Bismack bill to Medicare?
In 2024, Dr. Bismack's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99239) and hospital inpatient care (99232).
Where did Dr. Gregory Thomas Bismack go to medical school?
Dr. Bismack graduated from Wayne State University School of Medicine in 2010.
What drugs does Dr. Gregory Thomas Bismack prescribe most?
In 2024 Medicare Part D data, Dr. Bismack's most prescribed drugs by claims were Eliquis, Furosemide and Atorvastatin Calcium.
Has Dr. Gregory Thomas Bismack received payments from drug or device companies?
CMS Open Payments shows $178 in general payments to Dr. Bismack from 3 companies from 2020 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Gregory Thomas Bismack been practicing?
Dr. Bismack graduated from medical school in 2010, 16 years ago.
Does Dr. Gregory Thomas Bismack do research?
Dmand AI links 1 publication to Dr. Bismack.
Who does Dr. Gregory Thomas Bismack publish with?
Dr. Bismack's most frequent co-authors are Nazish Khurram, MD (1 shared paper).
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