Douglas J. Dearth Jr., MD

Medicare activity in 2024

Official CMS public-use data for Douglas J. Dearth Jr., 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. Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)14 services
2. Insertion of artery tube for blood sampling or infusion through skin (36620)13 services
3. Anesthesia for other procedure on large bowel using an endoscope (00811)11 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%
• Ischemic heart disease46%
• Arthritis44%
• Diabetes40%
• Anxiety38%

Hospitals where Douglas J. Dearth Jr. works

Medicare's Facility Affiliation Data lists Douglas J. Dearth Jr. 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.

• Fairfield Medical CenterLancaster, OH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 360072

Practice locations

Addresses where Douglas J. Dearth Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• 401 N Ewing StLancaster, OH 43130 (740) 687‑8183

Group practices

Medicare enrollment lists Douglas J. Dearth Jr. as a member of this group (CMS data updated October 2, 2026).

• Fairfield Anesthesia Associates Inc12 clinicians in the group

Specialties

• Anesthesiologyprimary

Find other Anesthesiology doctors in Ohio →

Other anesthesiologists in Lancaster

Clinicians with the same Medicare primary specialty in Lancaster, OH — not a recommendation.

• Todd A. Armen, MD
• Daniel P. O'Reilly
• John M. Weaver, MD
• Joseph Mannella, MD
• Pamela Benavidez
• Amber Reitz
• Ronald P. Linehan, MD
• Priscilla E. White, MD

All anesthesiologists in Lancaster →

Other clinicians in Fairfield Anesthesia Associates Inc

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

• Todd A. Armen, MD
• Daniel P. O'Reilly
• John M. Weaver, MD
• Joseph Mannella, MD
• Dustin Alvey, MD
• David L. Conley, MD

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