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Family Practice

Erin E. Fancher Gagen, MD

Works at hospitals in O Fallon, IL · Belleville, IL · Highland, IL … · Illinois

Summary

Dr. Erin E. Fancher Gagen, MD is a family doctor at 411 E Broadway, Trenton, IL 62293. Phone: (618) 224-7000. Accepts Medicare assignment. In 2024, Erin E. Fancher Gagen had 342 Original Medicare patients and 1,158 services. NPI 1184657090. 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 Erin E. Fancher Gagen, 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 Erin E. Fancher Gagen accept Medicare assignment?
Yes. Medicare's clinician data says Erin E. Fancher Gagen 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 Erin E. Fancher Gagen see?
In 2024, CMS data shows 342 Original Medicare patients and 1,158 services for Erin E. Fancher Gagen. This counts Original Medicare only and measures volume, not quality.
What is Erin E. Fancher Gagen's NPI number?
1184657090. 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 Erin E. Fancher Gagen, 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 patients342
Services billed to Medicare1,158
Different services or procedures31
Participating Medicare providerYes
Average age of these patients73

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)408 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)226 services
  3. Annual depression screening, 5 to 15 minutes (G0444)153 services
  4. Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)65 services
  5. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)57 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 cholesterol72%
  • High blood pressure65%
  • Arthritis38%
  • Diabetes28%
  • Ischemic heart disease25%
  • Atrial fibrillation17%

Hospitals where Erin E. Fancher Gagen works

Medicare's Facility Affiliation Data lists Erin E. Fancher Gagen 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.

  • HSHS St Elizabeth's HospitalO Fallon, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140187
  • Memorial HospitalBelleville, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140185
  • St Joseph's HospitalHighland, IL · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 141336
  • St Josephs HospitalBreese, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140145
  • Washington County HospitalNashville, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141308

Practice locations

Addresses where Erin E. Fancher Gagen is enrolled with Medicare (CMS data updated October 2, 2026).

Specialties

Find other Family Practice doctors in Illinois →

Other family doctors in Illinois

Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.

All family doctors in Illinois →

Clinician information

CredentialMD
Medical schoolUniversity Of Illinois College Of Med (chi/peor/rock/chm-Urb)
Graduation year2002 (24 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1184657090
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