Gregory Thomas Bismack, M.D.
Internal Medicine · Effingham, IL
At a glance
503 N Maple St, Effingham, IL 62401-2006
NPPES record updated Jun 22, 2026. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
503 N Maple StEffingham, IL 62401-2006
Additional reported practice locations
401 Corporate Park DrClayton, MO 631054201
Phone: 6362284149 2351 Frank Scott Pkwy E
O Fallon, IL 622697457
Phone: 6362884149
Education & affiliations
- Medical / professional school
- Wayne State University School Of Medicine
- Graduation year
- 2010
- CMS specialties
- Hospitalist · Internal Medicine
Practice groups
- Cep America - Illinois Snf Llp
- Cep America-Illinois Hospitalists, Llp
- Galen Inpatient Physicians Pc
- Ste Genevieve County Memorial Hospital
Reported hospital affiliations
- Hshs St Elizabeth's Hospital O Fallon, IL
- Osf Saint Anthony's Health Center Alton, IL
- Ssm St Clare Health Center Fenton, MO
- St Joseph's Hospital Highland, IL
- Ste Genevieve County Memorial Hospital Sainte Genevieve, MO
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $20.23 |
Reporting companies
| Company | Amount |
|---|---|
| ZOLL SERVICES LLC (A/K/A ZOLL LIFECOR CORP) | $20.23 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Internal Medicine
- Taxonomy code
- 207R00000X
- Enumeration date
- Apr 8, 2010
- Record updated
- Jun 22, 2026
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
208M00000X
License reported: 2022010983 MO
208M00000X
License reported: 036155470 IL
207R00000X
License reported: 4301097035 MI
207R00000X · Primary
License reported: 036.155470 IL
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
503 N Maple StEffingham, IL 62401-2006
- Phone
- (217) 342-2121
Mailing address
801 SWARTHMORE LNUNIVERSITY CITY, MO 631303620
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
Report a directory issue