Elizabeth A. Obrien, MD

Medicare activity in 2024

Official CMS public-use data for Elizabeth A. Obrien, 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. Emergency department visit with high level of medical decision making (99285)347 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)99 services
3. Emergency department visit with moderate level of medical decision making (99284)36 services
4. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)18 services
5. Critical care, first 30-74 minutes (99291)17 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 cholesterol75%
• Arthritis49%
• Anxiety40%
• Ischemic heart disease34%
• Depression34%

Hospitals where Elizabeth A. Obrien works

Medicare's Facility Affiliation Data lists Elizabeth A. Obrien 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.

• Wentworth-Douglass HospitalDover, NH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 300018

Practice locations

Addresses where Elizabeth A. Obrien is enrolled with Medicare (CMS data updated October 2, 2026).

• 65 Calef HwyLee, NH 03861 (603) 868‑8507
• 701 Central AveDover, NH 03820 (603) 609‑6700
• 789 Central AveDover, NH 03820 (603) 742‑5252

Group practices

Medicare enrollment lists Elizabeth A. Obrien as a member of these groups (CMS data updated October 2, 2026).

• Seacoast Emergency Physicians, PC51 clinicians in the group
• Ocumed LLC30 clinicians in the group

Specialties

• Emergency Medicineprimary

Find other Emergency Medicine doctors in New Hampshire →

Other emergency medicine doctors in Lee

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

• Samuel W. Trotzky, MD
• Jeffrey T. Richard Ii, DO
• Lukas R. Kolm, MD
• Isaak M. Jones, MD
• Brandon M. Roe, DO
• Edward J. Williams, MD
• Michael J. Keating, MD

All emergency medicine doctors in Lee →

Other clinicians in Seacoast Emergency Physicians, PC

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

• Brian Cartier
• Brittany L. Sanseverino, NP
• Samuel W. Trotzky, MD
• Kathryn E. Jennings
• Danielle M. Desantis, PA
• Gia Guerard

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