Erin A. Farrish, MD

Medicare activity in 2024

Official CMS public-use data for Erin A. Farrish, 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)427 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)200 services
3. Assessment of emotional or behavioral problems (96127)172 services
4. Detection test by immunoassay with direct visual observation for influenza virus (87804)137 services
5. Annual alcohol misuse screening, 5 to 15 minutes (G0442)126 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 cholesterol75%
• High blood pressure68%
• Arthritis43%
• Ischemic heart disease30%
• Diabetes24%
• Anxiety19%

Hospitals where Erin A. Farrish works

Medicare's Facility Affiliation Data lists Erin A. Farrish 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.

• Berkeley Medical CenterMartinsburg, WV · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 510008
• Frederick Health HospitalFrederick, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210005

Practice locations

Addresses where Erin A. Farrish is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

• 1 Frederick Health WayFrederick, MD 21701
• 11110 Medical Campus RdHagerstown, MD 21742
• 1194 Dutchmans Creek DrBrunswick, MD 21716 (240) 215‑6310
• 187 Thomas Johnson DrFrederick, MD 21702
• 187 Thomas Johnson Dr, Suite 6Frederick, MD 21702

Group practices

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

• Meritus Medical Center Inc743 clinicians in the group
• Amber Hill Physical Therapy Inc334 clinicians in the group
• Frederick Health Hospital Inc127 clinicians in the group
• Middletown Valley Family Medicine, P.A.7 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Maryland →

Other internal medicine doctors in Frederick

Clinicians with the same Medicare primary specialty in Frederick, MD — not a recommendation.

• Eleanor D. Lannutti, DO
• Mariaileen D. Sourwine, MD
• Patrick O'Neil, MD
• Thelma Ayensu, MD
• Ajay P. Reddy, MD
• Andrew O. Donelson, MD
• Chaitanya Mishra, MD
• Scott V. Zaft, MD

All internal medicine doctors in Frederick →

Other clinicians in Meritus Medical Center Inc

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

• Merih D. O Donoghue, MD
• Cassandra Prasad, NP
• Xin Xin, DO
• Ernest K. Amegashie, MD
• Audrey Nnoli, NP
• Shaju Shamsuddin, 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