Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Colorectal Surgery (Proctology)

Justin L. Fischer, MD

Works at hospitals in Peoria, IL · Springfield, IL · Bloomington, IL · Illinois

Summary

Dr. Justin L. Fischer, MD is a colorectal surgeon at 1001 Main St, Suite 300, Peoria, IL 61606. Phone: (217) 528-7541. Accepts Medicare assignment. In 2024, Justin L. Fischer had 235 Original Medicare patients and 504 services. NPI 1730456914. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Justin L. Fischer, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Justin L. Fischer accept Medicare assignment?
Yes. Medicare's clinician data says Justin L. Fischer accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Justin L. Fischer see?
In 2024, CMS data shows 235 Original Medicare patients and 504 services for Justin L. Fischer. This counts Original Medicare only and measures volume, not quality.
What is Justin L. Fischer's NPI number?
1730456914. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Justin L. Fischer, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients235
Services billed to Medicare504
Different services or procedures78
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. Diagnostic exam of lower portion of large bowel using a flexible endoscope (45330)46 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)43 services
  3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)42 services
  4. Diagnostic exam of anus using an endoscope (46600)32 services
  5. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)31 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Arthritis46%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)38%
  • Anxiety29%
  • Chronic kidney disease29%

Hospitals where Justin L. Fischer works

Medicare's Facility Affiliation Data lists Justin L. Fischer at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Justin L. Fischer is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Justin L. Fischer as a member of these groups (CMS data updated October 2, 2026).

  • OSF Multi-Specialty Group2,114 clinicians in the group
  • Springfield Clinic, LLP687 clinicians in the group

Specialties

Find other Colorectal Surgery (Proctology) doctors in Illinois →

Other colorectal surgeons in Peoria

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

All colorectal surgeons in Peoria →

Other clinicians in OSF Multi-Specialty Group

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolSouthern Illinois University School Of Medicine
Graduation year2010 (16 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1730456914
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 October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians