Darling A. Ruiz Cerrato, MD

Medicare activity in 2024

Official CMS public-use data for Darling A. Ruiz Cerrato, 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)203 services
2. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)74 services
3. Test to measure expiratory airflow and volume (94010)60 services
4. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)33 services
5. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)27 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 disease62%
• Diabetes61%
• Heart failure60%
• Chronic kidney disease59%

Hospitals where Darling A. Ruiz Cerrato works

Medicare's Facility Affiliation Data lists Darling A. Ruiz Cerrato 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.

• MedStar Georgetown University HospitalWashington, DC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 090004
• MedStar Washington Hospital CenterWashington, DC · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 090011

Practice locations

Addresses where Darling A. Ruiz Cerrato is enrolled with Medicare (CMS data updated October 2, 2026).

• 106 Irving St NW 4200, Mmg at WhcWashington, DC 20010 (202) 877‑2200
• 110 Irving St NWWashington, DC 20010 (202) 877‑7000

Group practices

Medicare enrollment lists Darling A. Ruiz Cerrato as a member of this group (CMS data updated October 2, 2026).

• MedStar Medical Group II LLC3,767 clinicians in the group

Specialties

• Internal Medicineprimary

Find other Internal Medicine doctors in District of Columbia →

Other internal medicine doctors in Washington

Clinicians with the same Medicare primary specialty in Washington, DC — not a recommendation.

• James G. Shaw, MD
• Laila R. Lalani, MD
• Namrata Shah, MD
• Keanan McGonigle, MD
• Francisco C. King, MD
• Joy Onaghise, MD
• Emmanuel T. Mbualungu, MD
• Sumitha Raman, MD

All internal medicine doctors in Washington →

Other clinicians in MedStar Medical Group II LLC

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

• Amanda J. Stieglitz, PA
• William M. Tsai, MD
• Guy Clifton, MD
• Matthew L. Pierce, MD
• Kavitha B. Rao, CP
• Teresa E. Narayan, OD

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