Justin J. Greiner, MD

Medicare activity in 2024

Official CMS public-use data for Justin J. Greiner, 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 low level od decision making, if using time, 20 minutes or more (99213)40 services
2. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)27 services
3. Aspiration and/or injection of fluid from large joint (20610)21 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).

• Arthritis75%
• High blood pressure69%
• High cholesterol65%
• Depression40%
• Anxiety33%
• Ischemic heart disease25%

Hospitals where Justin J. Greiner works

Medicare's Facility Affiliation Data lists Justin J. Greiner 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.

• Bellevue Medical CenterBellevue, NE · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 280132
• The Nebraska Medical CenterOmaha, NE · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 280013

Practice locations

Addresses where Justin J. Greiner is enrolled with Medicare (CMS data updated October 2, 2026).

• 4014 Leavenworth StOmaha, NE 68105 (402) 552‑7928

Group practices

Medicare enrollment lists Justin J. Greiner as a member of this group (CMS data updated October 2, 2026).

• UNMC Physicians1,518 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in Nebraska →

Other orthopedic surgeons in Omaha

Clinicians with the same Medicare primary specialty in Omaha, NE — not a recommendation.

• Michael H. McGuire, MD
• Ennio A. Rizzo Esposito, MD
• Nicholas K. Wischmeier, MD
• Beau J. Kildow, MD
• James B. Gill, MD
• Joseph A. Morgan, MD
• Noah E. Porter, MD
• Michael A. Thompson, MD

All orthopedic surgeons in Omaha →

Other clinicians in UNMC Physicians

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

• Pariwat Thaisetthawatkul, MD
• Christopher J. Smith, MD
• Evan B. Symons, DO
• Anery A. Patel
• Denise N. Gordon, CNA
• Paul J. Aylward, 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