John P. Slovak Jr., MD

Medicare activity in 2024

Official CMS public-use data for John P. Slovak Jr., 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 moderate level of decision making, if using time, 30 minutes or more (99214)657 services
2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)132 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%
• Ischemic heart disease54%
• Arthritis48%
• Atrial fibrillation34%
• Chronic kidney disease28%

Hospitals where John P. Slovak Jr. works

Medicare's Facility Affiliation Data lists John P. Slovak Jr. 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.

• Lancaster General HospitalLancaster, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390100

Practice locations

Addresses where John P. Slovak Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

• 217 Harrisburg AveLancaster, PA 17603 (717) 544‑8300

Group practices

Medicare enrollment lists John P. Slovak Jr. as a member of this group (CMS data updated October 2, 2026).

• The Heart Group of Lancaster General Health64 clinicians in the group

Specialties

• Cardiovascular Disease (Cardiology)primary

Find other Cardiovascular Disease (Cardiology) doctors in Pennsylvania →

Other cardiologists in Lancaster

Clinicians with the same Medicare primary specialty in Lancaster, PA — not a recommendation.

• Robert J. Rokowski, MD
• Panayotis Alain Efstratiou, MD
• Ross G. Biggs, DO
• Mrinalini Meesala, MD
• Marjan U. Mujib, MD
• Matthew Evans, DO
• Ajay R. Marwaha, MD
• Zachary S. Huston, MD

All cardiologists in Lancaster →

Other clinicians in The Heart Group of Lancaster General Health

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

• Nicole Newman, NP
• Robert J. Rokowski, MD
• Stacy M. Eshleman, NP
• Roy Small, MD
• Mrinalini Meesala, MD
• Michael C. Viray, 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