Christian Massier, MD

Medicare activity in 2024

Official CMS public-use data for Christian Massier, 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)119 services
2. Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)49 services
3. Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)49 services
4. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)39 services
5. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)39 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%
• Arthritis55%
• Chronic kidney disease42%
• Diabetes41%
• Anxiety38%

Hospitals where Christian Massier works

Medicare's Facility Affiliation Data lists Christian Massier 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.

• Cleveland ClinicCleveland, OH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 360180
• Marymount HospitalGarfield Heights, OH · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 360143
• South Pointe HospitalWarrensville Heights, OH · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: not listed by Medicare · CCN 360144

Practice locations

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

• 9500 Euclid AveCleveland, OH 44195 (216) 444‑2200

Group practices

Medicare enrollment lists Christian Massier as a member of this group (CMS data updated October 2, 2026).

• Cleveland Clinic7,090 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in Ohio →

Other general surgeons in Cleveland

Clinicians with the same Medicare primary specialty in Cleveland, OH — not a recommendation.

• Anthony Deross
• Valentin Mocanu, MD
• Angelina Trovato, DO
• Christin Collins, DO
• Salvador Navarrete, MD
• Walter S. Cha, MD
• Joseph A. Posluszny
• Gustavo Romero Velez, MD

All general surgeons in Cleveland →

Other clinicians in Cleveland Clinic

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

• Holly M. McMahon
• Brandon Moss, MD
• Ashley Sferra
• Rebecca M. Everett
• Laura Nelson
• Laura L. Hartle

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