Joseph R. Mendelis, MD

Medicare activity in 2024

Official CMS public-use data for Joseph R. Mendelis, 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 moderate level of decision making, if using time, 30 minutes or more (99214)727 services
2. X-ray of lower and sacral spine, minimum of 4 views (72110)337 services
3. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)241 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)131 services
5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)107 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 cholesterol75%
• Arthritis75%
• High blood pressure72%
• Ischemic heart disease37%
• Anxiety29%
• Depression26%

Hospitals where Joseph R. Mendelis works

Medicare's Facility Affiliation Data lists Joseph R. Mendelis 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.

• Los Robles Hospital & Medical CenterThousand Oaks, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050549
• UCLA West Valley Medical CenterWest Hills, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050481

Practice locations

Addresses where Joseph R. Mendelis is enrolled with Medicare (CMS data updated October 2, 2026).

• 100 UCLA Medical Plz, Suite 460Los Angeles, CA 90024 (310) 443‑8999
• 2655 1st St, Suite 300Simi Valley, CA 93065 (805) 578‑8550
• 30870 Russell Ranch Rd, Suite 330Westlake Village, CA 91362 (805) 497‑7015
• 757 Westwood PlzLos Angeles, CA 90095 (310) 825‑9111

Group practices

Medicare enrollment lists Joseph R. Mendelis as a member of this group (CMS data updated October 2, 2026).

• Regents of the University of California140 clinicians in the group

Specialties

• Orthopedic Surgeryprimary

Find other Orthopedic Surgery doctors in California →

Other orthopedic surgeons in Los Angeles

Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.

• Carol A. Lin, MD
• Mohsin S. Fidai, MD
• Charles L. Herring, MD
• Michael J. Lim, MD
• Jamshid J. Hekmat, MD
• Mark H. Getelman, MD
• Michael S. Bahk, MD
• Varun Singla, MD

All orthopedic surgeons in Los Angeles →

Other clinicians in Regents of the University of California

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

• Karl Balch, MD
• Nicholas R. Campbell, PA
• Sarla L. Persaud, PA
• Christopher D. Hamilton, MD
• Mark H. Getelman, MD
• Austin C. Gray, PT

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