Thomas Frederic Ganz, M.D.
Obstetrics & Gynecology Physician · Warrenton, MO
Thomas Frederic Ganz, M.D. is an obstetrics & gynecology physician with a practice address in Warrenton, Missouri, and NPI 1447696802, issued on May 13, 2013. Check the license (Missouri 2017010588, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Thomas Frederic Ganz
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 2017010588 MO
Self-reported in NPPES; status is on the state search - Practice location
- 18800 Schnucks Dr Ste B, Warrenton, MO 63383
- Phone
- (636) 456-3413
- Enumerated
- May 13, 2013
- Record last updated
- Jun 6, 2025
- Fax
- (636) 379-1297
- Medicare enrollment
- Enrolled (PECOS I20170809003301); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 902 in Missouri → Look up another NPI →
Also registered at 18800 Schnucks Dr Ste B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Judith Hustermann, NPNurse Practitioner1255639019
- Kelly Schokmiller, FNPNurse Practitioner1952786410
- Chad Smith, D.O.Family Medicine Physician1982600615
- Ann Wieman, DPMPodiatrist1366557290
- Ann Wilson, DPMPodiatrist1902911829
Verify Thomas Frederic Ganz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 2017010588Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
260 Medicare Part D claims for 91 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 13 claims were for opioids.
Most prescribed
- Estradiol59 claims
- Triamcinolone Acetonide32 claims
- Oxybutynin Chloride Er21 claims
- Medroxyprogesterone Acetate19 claims
- Ibuprofen14 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $13,092.77
2 payments; by number, the most common kind was travel and lodging; the largest payer was Pharmacosmos Therapeutics Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Ssm Medical Group IncO Fallon, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Frederic Ganz among 902 obstetrics & gynecology physician records in Missouri
Thomas Frederic Ganz, M.D. is one of 902 obstetrics & gynecology physician records with a practice address in Missouri. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 65% of them.
- NPI issued2013 · 65% of these records are older, 32% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2013 · median 2007 among the 528 with a school on file
- Record last updated2025 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Missouri
There are 902 obstetrics & gynecology physician records in Missouri.
All 902 in Missouri → Every provider in Warrenton → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Kevin Foster, DOWentzville, MO 633851760588842
- Aubrey Jaeger, MDWentzville, MO 633851871172239
- Paul Tapia, MDWentzville, MO 633851063518157
- Beth Rasmussen, M.D.Troy, MO 633791568544278
- Kirim Chang, M.D.Saint Peters, MO 633761114133212
- Joseph Hazan, MDSt Peters, MO 633761881786960
- Stephanie Higgins, MDSaint Peters, MO 633761093109258
- Janet Matuszek, DOSaint Peters, MO 633761265542146
Common questions
What is Thomas Frederic Ganz, M.D.'s NPI number?
Thomas Frederic Ganz, M.D.'s National Provider Identifier (NPI) is 1447696802, issued on May 13, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Frederic Ganz, M.D. located?
The NPPES record lists a practice address at 18800 Schnucks Dr Ste B, Warrenton, MO, 63383. Phone: (636) 456-3413. Providers update this record themselves, so call before visiting.
How can I verify Thomas Frederic Ganz, M.D.'s license?
NPPES lists Missouri license number 2017010588, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Thomas Frederic Ganz, M.D. prescribe under Medicare Part D?
In 2024, Thomas Frederic Ganz, M.D. had 260 Medicare Part D claims for 91 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.