Dorrie C. Tredway, MD

Medicare activity in 2024

Official CMS public-use data for Dorrie C. Tredway, 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.

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)220 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)83 services
3. Administration of influenza virus vaccine (G0008)36 services
4. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)32 services
5. Influenza vaccine split virus, preservative free (90662)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%
• Arthritis34%
• Diabetes32%
• Ischemic heart disease23%
• Anxiety23%

Hospitals where Dorrie C. Tredway works

Medicare's Facility Affiliation Data lists Dorrie C. Tredway 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 Johns HospitalSpringfield, IL · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 140053

Practice locations

Addresses where Dorrie C. Tredway is enrolled with Medicare (CMS data updated October 2, 2026).

• 1512 N Green Mount Rd, Suite 108Ofallon, IL 62269 (618) 624‑5510

Group practices

Medicare enrollment lists Dorrie C. Tredway as a member of this group (CMS data updated October 2, 2026).

• HSHS Medical Group Inc219 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Illinois →

Other family doctors in Ofallon

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

• Gregory Climaco, MD
• Gregorio C. Climaco, MD
• Rema Sanghavi, MD
• Nell A. Hennon, DO
• Ahmed Radwan, MD
• Hannah Webber, MD
• Steven A. Taylor, MD

All family doctors in Ofallon →

Other clinicians in HSHS Medical Group Inc

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

• Bradley A. Wilson, MD
• Heather Ackerman
• Rama Poola, MD
• Gregory Climaco, MD
• Richard C. Derby
• Erin L. Robke, NP

Clinician information

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