Joshua M. Keegan, MD

Medicare activity in 2024

Official CMS public-use data for Joshua M. Keegan, 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)190 services
2. Emergency department visit with high level of medical decision making (99285)88 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)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).

• High blood pressure75%
• High cholesterol70%
• Anxiety52%
• Stroke or mini-stroke50%
• Arthritis44%
• Depression43%

Hospitals where Joshua M. Keegan works

Medicare's Facility Affiliation Data lists Joshua M. Keegan 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.

• Cheshire Medical CenterKeene, NH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 300019
• Mary Hitchcock Memorial HospitalLebanon, NH · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 300003

Practice locations

Addresses where Joshua M. Keegan is enrolled with Medicare (CMS data updated October 2, 2026).

• 1 Medical Ctr DrLebanon, NH 03756 (603) 650‑5000

Group practices

Medicare enrollment lists Joshua M. Keegan as a member of this group (CMS data updated October 2, 2026).

• Dartmouth-Hitchcock Clinic1,472 clinicians in the group

Specialties

• Neurologyprimary

Find other Neurology doctors in New Hampshire →

Other neurologists in Lebanon

Clinicians with the same Medicare primary specialty in Lebanon, NH — not a recommendation.

• Carlyn Rodriguez Nazario, MD
• Steven Cherry, DO
• Megan M. Donohue, MD
• Andrew M. Slater, DO
• Jeffrey A. Cohen, MD
• Hans Puttgen, MD
• Cameron Stewart, MD
• Sergio A. Ramirez Salazar, MD

All neurologists in Lebanon →

Other clinicians in Dartmouth-Hitchcock Clinic

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

• Miguel A. Antelo, MD
• Aaron S. Helminski, MD
• Jane B. Vasquez
• Jeffrey Masi, MD
• Graham T. Atkins, MD
• Amelia M. Cullinan, 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