Kathryn H. Libby, MD

Medicare activity in 2024

Official CMS public-use data for Kathryn H. Libby, 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. Critical care, first 30-74 minutes (99291)40 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 cholesterol64%
• High blood pressure62%
• COPD41%
• Heart failure38%
• Anxiety36%
• Atrial fibrillation36%

Hospitals where Kathryn H. Libby works

Medicare's Facility Affiliation Data lists Kathryn H. Libby 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 Franklin HospitalFarmington, ME · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 201316
• MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200009
• Northern Light Mercy HospitalPortland, ME · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 200008
• The Memorial HospitalNorth Conway, NH · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 301307

Practice locations

Addresses where Kathryn H. Libby is enrolled with Medicare (CMS data updated October 2, 2026).

• 100 Foden Rd, Suite 103South Portland, ME 04106 (207) 828‑1122
• 155 Rover River PkwyPortland, ME 04102 (207) 879‑3000
• 175 Fore River PkwyPortland, ME 04102 (207) 879‑3000
• 21 Main StLivermore Falls, ME 04254
• 40 Park RdWestbrook, ME 04092 (207) 857‑8174

Group practices

Medicare enrollment lists Kathryn H. Libby as a member of these groups (CMS data updated October 2, 2026).

• MaineHealth2,633 clinicians in the group
• Mercy Hospital301 clinicians in the group
• Chest Medicine Associates PA30 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.

• Cynthia A. Atkinson, MD
• Charles J. Cathcart, MD
• Sarah E. Subak Krah, MD
• Hilamber Subba, MD
• Luke A. Pluto, MD
• Daniel J. Griffin, MD
• David M. Stein, DO
• Robert J. Fraser, DO

All internal medicine doctors in South Portland →

Other clinicians in MaineHealth

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

• Mary Brennan, NP
• Niveditha Badrinarayanan, MD
• Steven L. Bender, CNA
• Marie C. Audett, MD
• Megan Harvey
• Julie Salvatelli

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