Ismanie Guillaume, MD

Medicare activity in 2024

Official CMS public-use data for Ismanie Guillaume, 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. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)544 services
2. Hospital discharge day management, more than 30 minutes (99239)102 services
3. Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)52 services
4. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)44 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%
• Arthritis56%
• Chronic kidney disease52%
• Ischemic heart disease46%
• Anxiety46%

Hospitals where Ismanie Guillaume works

Medicare's Facility Affiliation Data lists Ismanie Guillaume 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.

• Christiana HospitalNewark, DE · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 080001
• Union Hospital of Cecil CountyElkton, MD · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 210032

Practice locations

Addresses where Ismanie Guillaume is enrolled with Medicare (CMS data updated October 2, 2026).

• 106 Bow StElkton, MD 21921 (410) 398‑4000
• 4755 Ogletown Stanton RdNewark, DE 19718 (302) 623‑0188

Group practices

Medicare enrollment lists Ismanie Guillaume as a member of these groups (CMS data updated October 2, 2026).

• Christiana Care Health Services Inc1,483 clinicians in the group
• Union Hospital of Cecil County288 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in Maryland →

Other internal medicine doctors in Elkton

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

• Luviza Santos, MD
• Ezekiel S. Kurcab, DO
• Chirag Bambhroliya, MD
• Balvender Singh, MD
• Robert Chou, MD
• Tyler Faimon, DO
• Zaid A. Ammari, MD
• Henal A. Patel, MD

All internal medicine doctors in Elkton →

Other clinicians in Christiana Care Health Services Inc

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

• Kelly D. Montalvo, PA
• Alberto Iaia, MD
• Ashanda P. Powell, MD
• Emily A. Morgan, PA
• Helen Chang-Deguzman, MD
• Saleena Malik, DO

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