Christian A. Merlo, MD

Medicare activity in 2024

Official CMS public-use data for Christian A. Merlo, 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)221 services
2. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)91 services
3. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)21 services
4. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)14 services
5. Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or (G2212)14 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%
• Chronic kidney disease68%
• COPD65%
• Diabetes59%
• Anxiety53%

Hospitals where Christian A. Merlo works

Medicare's Facility Affiliation Data lists Christian A. Merlo 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.

• Johns Hopkins Bayview Medical CenterBaltimore, MD · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 210029
• The Johns Hopkins HospitalBaltimore, MD · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 210009

Practice locations

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

• 1800 Orleans StBaltimore, MD 21287 (410) 955‑5000
• 5601 Lloch Raven BlvdBaltimore, MD 21239 (443) 444‑4714
• 600 N Wolf StBaltimore, MD 21287 (410) 955‑5000
• 600 N Wolfe St, Blalock 266Baltimore, MD 21287 (410) 502‑4340
• 601 N Caroline StBaltimore, MD 21287 (410) 955‑5080

Group practices

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

• Johns Hopkins University2,909 clinicians in the group
• Johns Hopkins University713 clinicians in the group

Specialties

• Critical Care (Intensivists)primary
• Internal Medicinealso
• Pulmonary Diseasealso

Find other Critical Care (Intensivists) doctors in Maryland →

Other critical care doctors in Baltimore

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

• Janaki Deepak, MD
• Nevins W. Todd, MD
• Joshua Tunnage, MD
• Alison V. Grazioli, MD
• Thomas L. Lopardo Jr., MD
• Daniel Brodie, MD
• Amar Deshwar, MD
• Michael C. Banks, MD

All critical care doctors in Baltimore →

Other clinicians in Johns Hopkins University

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

• Keith R. McIntyre
• Kent Stevens, MD
• Sunil Sinha, MD
• Emmanouil Tampakakis, MD
• Tamara L. Lotan, MD
• Zoobia Chaudhry, 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