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Pathology

Patrick R. Hemmer, MD

Works at hospitals in O Fallon, IL · Effingham, IL · Springfield, IL … · Illinois

Summary

Patrick R. Hemmer, MD (Pathology) is listed by Medicare at 5 hospitals in O Fallon, IL, Effingham, IL and Springfield, IL and other places. NPI 1215908850. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Patrick R. Hemmer, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

PathologyPrimary specialty
YesAccepts Medicare assignment
25Years since medical school (graduated 2001)
Sanford School Of Medicine Of University Of South DakotaMedical school
MaleGender (as listed)
Associated Pathologists LtdGroup practice

Quick answers

Which hospitals does Patrick R. Hemmer work at?
Medicare's official clinician data lists Patrick R. Hemmer at 5 hospitals: HSHS St Elizabeth's Hospital, St Anthonys Memorial Hospital, St Johns Hospital, St Josephs Hospital and St Marys Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Patrick R. Hemmer see patients?
Medicare's clinician data lists 6 practice locations, including Litchfield, IL, Highland, IL and Decatur, IL. Call before your visit to confirm the address.
What is Patrick R. Hemmer's specialty?
Medicare lists Pathology as the primary specialty.
Does Patrick R. Hemmer accept Medicare assignment?
Yes. Medicare's clinician data says Patrick R. Hemmer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Patrick R. Hemmer?
(217) 324-2191, as listed in official Medicare / NPI Registry data.
What is Patrick R. Hemmer's NPI number?
1215908850. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Patrick R. Hemmer works

Medicare's Facility Affiliation Data lists Patrick R. Hemmer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Patrick R. Hemmer is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.

Group practices

Medicare enrollment lists Patrick R. Hemmer as a member of this group (CMS data updated 2026-10-02).

  • Associated Pathologists Ltd10 clinicians in the group

Specialties

Find other Pathology doctors in Illinois →

Other pathologists in Litchfield

Clinicians with the same Medicare primary specialty in Litchfield, IL — not a recommendation.

All pathologists in Litchfield →

Clinician information

CredentialMD
Medical schoolSanford School Of Medicine Of University Of South Dakota
Graduation year2001
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1215908850
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians