Dr. Thomas Frederic Ganz, MD
- Medicare services, 2024
- 24
- Medicare patients, 2024
- 47
- Part D claims, 2024
- 260
- Hospital affiliations
- 3
- Industry payments
- $13,181
- Practice address
- 1101 Highway K, O Fallon, MO 63366
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
SSM Health Medical Group Ofallon - HOPD
Inpatient Rehabilitation Facility · O Fallon, Missouri
Find Dr. Ganz's professional email, personal email and mobile number
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Dr. Thomas Frederic Ganz is an OB-GYN in O Fallon, Missouri
Dr. Ganz practices at SSM Health Medical Group Ofallon - HOPD in O Fallon, Missouri.
Dr. Ganz's NPI, 1447696802, was assigned on May 13, 2013. Dr. Ganz graduated from Saint Louis University School of Medicine in 2013. Dr. Ganz holds Missouri license 2017010588.
- NPI
- 1447696802NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6406158823
- NPI enumeration date
- May 13, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas Frederic Ganz practices at SSM Health Medical Group Ofallon - HOPD in O Fallon, Missouri
Dr. Ganz's primary practice is SSM Health Medical Group Ofallon - HOPD, at 1101 Highway K, O Fallon, MO 63366.
- SSM Health Medical Group Ofallon - HOPD1101 Highway K, O Fallon, MO 63366
Source: Dmand AI Affiliation Data
Dr. Thomas Frederic Ganz is affiliated with 6 sites of care and 2 medical groups
Dr. Ganz's primary practice is SSM Health Medical Group Ofallon - HOPD in O Fallon, Missouri. Dr. Ganz is also affiliated with SSM Health St. Joseph Hospital - St. Charles. The medical group on file is SSM Health Medical Group. Dmand AI also links Dr. Ganz to 1 more hospital, 2 group practices and clinics, 1 hospital outpatient department and 1 medical group, each named with a free account. Dr. Ganz's employer is on file too: a hospital.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas Frederic Ganz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ganz practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| SSM Health Medical Group Ofallon - HOPD | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Frederic Ganz is one of 712 OB-GYNs in Missouri
Obstetrics and gynecology is Dr. Ganz's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Ganz is licensed in Missouri.
Specialties and state licenses
- Obstetrics and gynecology, MissouriPrimary
OB-GYNs near Dr. Ganz
Counts of OB-GYNs 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. Thomas Frederic Ganz billed Medicare for 24 services in 2024
CMS data shows 24 Medicare services from Dr. Ganz across 2 procedure codes in 2024, all of them office visits, for 47 Medicare patients. Medicare paid $1,458 for them. Every service was in an office.
Dr. Ganz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 242024: 24No change
Dr. Ganz compared with the Missouri median for OB-GYNs, 2024
- Dr. Ganz
- Missouri median
- Medicare services
- 24vs 5355% below
- Medicare patients
- 47vs 47Close to median
- Part D claims
- 145vs 453.2 times
Medians across 650 OB-GYNs in Missouri with Dmand AI profiles that report each measure.
Dr. Ganz'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. Ganz?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ganz and other OB-GYNs in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Frederic Ganz treated 47 Medicare patients in 2024, average age 68
CMS counts 47 Medicare patients who saw Dr. Ganz in 2024. The largest group is 65 to 74, with 27 patients. 74% of them have high cholesterol, and 68% have high blood pressure. Their average risk score is 1.52, 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. Ganz's median patient age at 38, with 99% women.
Dr. Ganz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Ganz's Medicare patients, 2024
- High cholesterol74%
- High blood pressure68%
- Anxiety40%
- Diabetes40%
- Arthritis36%
- Mood disorders34%
- Depression30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ganz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 38
Patient panel by sex, all payers
- Women99%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Frederic Ganz wrote 260 Medicare Part D claims in 2024
In 2024, Dr. Ganz wrote 260 Medicare Part D claims for 91 patients. 90% of them were for generic drugs. CMS names the drug for 145 of them, across 5 drugs with 11 or more claims each, at $5,375 in total drug cost. In 2023, CMS named 155 claims across 6 drugs.
Dr. Ganz's Part D claims by kind of drug, 2024
- Generic234 claims90%
- Brand-name26 claims10%
Dr. Ganz'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. Ganz's Part D claims, 2024
- Opioids5%13 of 260 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: 1552024: 1456%
Drugs named by CMS: 5 in 2024, 6 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. Thomas Frederic Ganz takes part in Medicare
Dr. Ganz accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of the uterus: 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. Thomas Frederic Ganz received $13,181 in industry payments from 2016 to 2024
CMS Open Payments shows 6 general payments to Dr. Ganz from 3 drug and device companies from 2016 to 2024. Honoraria make up the largest share, 99% of the total. Pharmacosmos Therapeutics Inc. paid the most, $13,093.
General payments to Dr. Ganz by program year, 2016 to 2024
General payments to Dr. Ganz by kind, 2016 to 2024
- Honoraria$13,00099%
- Travel and lodging$931%
- Food and beverage$881%
Companies that paid Dr. Ganz the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas Frederic Ganz graduated from Saint Louis University School of Medicine
Dr. Ganz graduated from Saint Louis University School of Medicine in 2013.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas Frederic Ganz'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 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. Thomas Frederic Ganz
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. Thomas Frederic Ganz's NPI number?
Dr. Thomas Frederic Ganz's NPI number is 1447696802. It was assigned on May 13, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Frederic Ganz?
Dr. Thomas Frederic Ganz is an OB-GYN in O Fallon, Missouri. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Thomas Frederic Ganz practice?
Dr. Ganz practices at 1101 Highway K, O Fallon, MO 63366. Dr. Ganz's primary practice is SSM Health Medical Group Ofallon - HOPD in O Fallon, Missouri. Dmand AI also links Dr. Ganz to 1 hospital, 2 group practices and clinics, 1 hospital outpatient department and 1 medical group.
What is Dr. Thomas Frederic Ganz's medical license number?
Dr. Ganz holds Missouri license 2017010588.
Which hospitals is Dr. Thomas Frederic Ganz affiliated with?
Dr. Ganz is affiliated with SSM Health St. Joseph Hospital - St. Charles. Dmand AI links Dr. Ganz to 2 more hospitals.
What medical group is Dr. Thomas Frederic Ganz part of?
Dr. Ganz is linked to SSM Health Medical Group. Dmand AI links Dr. Ganz to 1 more medical group.
Does Dr. Thomas Frederic Ganz accept Medicare?
Yes. CMS data shows Dr. Ganz billed Medicare for 24 services in 2024, and Dr. Ganz accepts Medicare assignment.
How many Medicare patients does Dr. Thomas Frederic Ganz see?
CMS counts 47 Medicare patients who saw Dr. Ganz in 2024, with an average age of 68.
What services does Dr. Thomas Frederic Ganz bill to Medicare?
In 2024, Dr. Ganz's most billed Medicare services were office visit, established patient (99214) and office visit, new patient (99203).
Where did Dr. Thomas Frederic Ganz go to medical school?
Dr. Ganz graduated from Saint Louis University School of Medicine in 2013.
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What drugs does Dr. Thomas Frederic Ganz prescribe most?
In 2024 Medicare Part D data, Dr. Ganz's most prescribed drugs by claims were Estradiol, Triamcinolone Acetonide and Oxybutynin Chloride ER.
Has Dr. Thomas Frederic Ganz received payments from drug or device companies?
CMS Open Payments shows $13,181 in general payments to Dr. Ganz from 3 companies from 2016 to 2024. The largest total came from Pharmacosmos Therapeutics Inc.
How long has Dr. Thomas Frederic Ganz been practicing?
Dr. Ganz graduated from medical school in 2013, 13 years ago.
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