Reza Rahbar-Semnani, MD

Medicare activity in 2024

Official CMS public-use data for Reza Rahbar-Semnani, 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 moderate level of medical decision making, if using time, 45 minutes or more (99204)50 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)44 services
3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)27 services
4. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)21 services
5. Partial removal of small and large bowel with attachment of small and large bowel using an endoscope (44205)19 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 cholesterol74%
• Arthritis50%
• Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)36%
• Ischemic heart disease34%
• Anxiety33%

Hospitals where Reza Rahbar-Semnani works

Medicare's Facility Affiliation Data lists Reza Rahbar-Semnani 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 Pen Bay HospitalRockport, ME · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 200063

Practice locations

Addresses where Reza Rahbar-Semnani is enrolled with Medicare (CMS data updated October 2, 2026).

• 22 Bramhall StPortland, ME 04102
• 4 Glen Cove DrRockport, ME 04856
• 6 Glen Cove DrRockport, ME 04856
• 600 New Waverly Pl, Suite 203Cary, NC 27518 (919) 859‑5650

Group practices

Medicare enrollment lists Reza Rahbar-Semnani as a member of these groups (CMS data updated October 2, 2026).

• MaineHealth2,633 clinicians in the group
• Raleigh Durham Medical Group PA77 clinicians in the group

Specialties

• Colorectal Surgery (Proctology)primary

Find other Colorectal Surgery (Proctology) doctors in Maine →

Other colorectal surgeons in Portland

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

• Marie C. Audett, MD
• Aos S. Karim, MD
• Kathreen P. Lee, MD

All colorectal surgeons in Portland →

Other clinicians in MaineHealth

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

• Lindsey L. Clement
• Marie M. Caldwell, MD
• Sarah D. Shepherd, DO
• Joel Joseph, MD
• Kristen Liederbach, CNA
• Courtney L. Osgood

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