Carl S. Demars, MD

Medicare activity in 2024

Official CMS public-use data for Carl S. Demars, 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. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)32 services
2. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)30 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).

• Depression30%
• High blood pressure28%
• Arthritis28%
• High cholesterol26%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)26%
• Anxiety24%

Hospitals where Carl S. Demars works

Medicare's Facility Affiliation Data lists Carl S. Demars 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 Mid Coast HospitalBrunswick, ME · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 200021

Practice locations

Addresses where Carl S. Demars is enrolled with Medicare (CMS data updated October 2, 2026).

• 108 Centre StBath, ME 04530
• 22 Bramhall StPortland, ME 04102
• 81 Medical Ctr Dr, Suite 2100Brunswick, ME 04011

Group practices

Medicare enrollment lists Carl S. Demars as a member of this group (CMS data updated October 2, 2026).

• MaineHealth2,633 clinicians in the group

Specialties

• Hospice/Palliative Careprimary
• Internal Medicinealso

Find other Hospice/Palliative Care doctors in Maine →

Other palliative care doctors in Maine

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

• David J. Martin, DO
• Rhianon R. Liu, MD
• Mark A. Wrona, MD
• Cosmina I. Fachiol, MD
• Laura Director, MD
• Sandra L. Stevens, MD
• Mikaela A. Coburn-Pierce, MD
• Prithwijit Das, MD

All palliative care doctors in Maine →

Other clinicians in MaineHealth

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

• Andrew G. Hinkens, MD
• Angela B. Kostenbader
• Matthew D. Poirier
• Evdokia Eleftheriou, MD
• Walter H. Dowling, PA
• Kelsea J. Sandefur, DO

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