Tierney L. Tirey, MD

Medicare activity in 2024

Official CMS public-use data for Tierney L. Tirey, 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 straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)209 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)178 services
3. Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes (99221)50 services
4. Hospital discharge day management, 30 minutes or less (99238)44 services
5. Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)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).

• High blood pressure75%
• High cholesterol75%
• Anxiety61%
• Depression52%
• Diabetes50%
• Arthritis48%

Hospitals where Tierney L. Tirey works

Medicare's Facility Affiliation Data lists Tierney L. Tirey 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.

• North Vista HospitalNorth las Vegas, NV · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 290005

Practice locations

Addresses where Tierney L. Tirey is enrolled with Medicare (CMS data updated October 2, 2026).

• 1825 Civic Ctr DrN Las Vegas, NV 89030 (702) 642‑8313

Group practices

Medicare enrollment lists Tierney L. Tirey as a member of this group (CMS data updated October 2, 2026).

• Zephyrene C Villaluz MD CHTD2 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in Nevada →

Other family doctors in N Las Vegas

Clinicians with the same Medicare primary specialty in N Las Vegas, NV — not a recommendation.

• Nathaina Smith, DO
• Curtis E. Bazemore, MD
• Sion Kim, MD
• Amir K. Nicknam, MD
• Lara C. Wenner, MD
• Zephyrene C. Villaluz, MD
• Mohammad Atif, MD

All family doctors in N Las Vegas →

Other clinicians in Zephyrene C Villaluz MD CHTD

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

• Zephyrene C. Villaluz, 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