1. Home
  2. Directory
  3. Missouri
  4. Warrenton
  5. Obstetrics Gynecology
  6. NPI Profile

DR. THOMAS FREDERIC GANZ M.D.
NPI 1447696802
Obstetrics & Gynecology in Warrenton, MO

Active since May 13, 2013PECOS EnrolledAccepts Medicare Assignment
18800 SCHNUCKS DR STE B, WARRENTON, MO 63383(636) 456-3413(636) 379-1297 Get Directions Write a Review

NPPES record last updated: June 6, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 6, 2025, Jun 12, 2024, Nov 11, 2020 and 4 more (7 updates tracked since 2017).

About Dr. Thomas Frederic Ganz M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. THOMAS FREDERIC GANZ M.D. (NPI 1447696802) is an individual obstetrics & gynecology provider in Warrenton, Missouri, licensed in Missouri (2017010588) and active in the NPI registry since May 2013. He is enrolled in Medicare PECOS, is affiliated with Ssm St Joseph Health Center, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1447696802
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDR. THOMAS FREDERIC GANZCredential: M.D.
Location Address18800 SCHNUCKS DR STE BWarrenton, MO 63383-1121
Mailing AddressPo Box 955534Saint Louis, MO 63195-5534
Phone(636) 456-3413
Fax(636) 379-1297
Sole ProprietorNo
Medical School CMSSaint Louis University School Of MedicineGraduated 2013
Enumeration DateMay 13, 2013
Last NPPES UpdateJune 6, 20257 updates tracked since enumeration
NPPES CertifiedJune 6, 2025
✔ NPI 1447696802 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in MO · 2017010588
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
18800 SCHNUCKS DR STE B, Warrenton, MO 63383
Open in Google Maps ↗

Secondary Practice Locations 4

Location 11101 Highway KO Fallon, MO 63366-8431 · Phone (636) 379-6363 · Fax (636) 379-1297
Location 2301 Caledonia Pkwy Ste 150O Fallon, MO 63368-6690 · Phone (636) 202-6802
Location 3172 Professional PkwyTroy, MO 63379-2823 · Phone (636) 462-6106
Location 4300 Medical Plz Ste 310Lake St Louis, MO 63367-1484 · Phone (636) 625-2662

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Sunflower Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Thomas Frederic Ganz M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6406158823
PECOS Enrollment IDI20170809003301
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
13 services13 patients
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203
This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.
11 services11 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ssm St Joseph Health Center

Acute Care Hospitals · Saint Charles, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260005
Location300 1st Capitol DrSaint Charles, MO 63301 · St. Charles County
Emergency services

Ssm St Joseph Hospital West

Acute Care Hospitals · Lake Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number260200
Location100 Medical PlazaLake Saint Louis, MO 63367 · St. Charles County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63383 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$121.96 typical visit price
range $52.28 – $161.24
Typical copayment $30.49 (range $13.07 – $40.31)
Most-billed visit code 99204
Established Patient
$65.71 typical visit price
range $16.30 – $131.05
Typical copayment $16.42 (range $4.07 – $32.76)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 5

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JUDITH L HUSTERMANN NP
Nurse Practitioner
18800 SCHNUCKS DR STE B
WARRENTON, MO 63383
Warren County (636) 456-3414
ANN E. WIEMAN DPM
Podiatrist
18800 SCHNUCKS DR STE B
WARRENTON, MO 63383
Warren County (636) 456-3413
ANN M WILSON DPM
Podiatrist
18800 SCHNUCKS DR STE B
WARRENTON, MO 63383
Warren County (636) 456-3413
KELLY S SCHOKMILLER FNP
Nurse Practitioner
18800 SCHNUCKS DR STE B
WARRENTON, MO 63383
Warren County (636) 456-3413
DR. CHAD J. SMITH D.O.
Family Medicine
18800 SCHNUCKS DR STE B
WARRENTON, MO 63383
Warren County (636) 456-3413

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Thomas Ganz's NPI number?

The NPI number for Thomas Ganz is 1447696802. It was assigned to this individual provider in the NPPES registry on May 13, 2013.

Where is Thomas Ganz located?

Thomas Ganz practices at 18800 Schnucks Dr Ste B, Warrenton, MO 63383. The listed phone number is (636) 456-3413.

What is Thomas Ganz's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Thomas Ganz enrolled in Medicare?

Yes. Thomas Ganz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Thomas Ganz accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 4 other insurers list Thomas Ganz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Thomas Ganz affiliated with any hospitals?

According to CMS data, Thomas Ganz is affiliated with Ssm St Joseph Health Center and Ssm St Joseph Hospital West.

When was this NPI record last updated?

The NPPES record for Thomas Ganz was last updated on June 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.