Douglas R. Barr, MD

Medicare activity in 2024

Official CMS public-use data for Douglas R. Barr, 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. Insertion of needle into vein for collection of blood sample (36415)338 services
2. Blood test, comprehensive group of blood chemicals (80053)219 services
3. Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)199 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)147 services
5. Blood test, lipids (cholesterol and triglycerides) (80061)144 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 cholesterol75%
• High blood pressure67%
• Arthritis46%
• Chronic kidney disease34%
• Anxiety28%
• Depression26%

Hospitals where Douglas R. Barr works

Medicare's Facility Affiliation Data lists Douglas R. Barr 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.

• MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200009

Practice locations

Addresses where Douglas R. Barr is enrolled with Medicare (CMS data updated October 2, 2026).

• 100 Foden RdSouth Portland, ME 04106 (207) 874‑1489

Group practices

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

• Intermed PA183 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Maine →

Other internal medicine doctors in South Portland

Clinicians with the same Medicare primary specialty in South Portland, ME — not a recommendation.

• James H. Zeitlin, MD
• Andrea S. Klayman, MD
• Peter W. Emery, MD
• John W. Gilboy, MD
• Stephen R. Gorman, DO
• Glenn K. Buchberger, MD
• Charles J. Cathcart, MD
• Wendy S. Cathcart, MD

All internal medicine doctors in South Portland →

Other clinicians in Intermed PA

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

• Mary J. Connolly, MD
• Mary G. Lavoie, MD
• Kellee F. Gorgone
• Tess C. Winters, MD
• David E. Clark, DO
• Cullen V. Cogburn

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