Joseph L. Demer, MD

Medicare activity in 2024

Official CMS public-use data for Joseph L. Demer, 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. Exam to measure eye deviation and range of motion (92060)189 services
2. Established patient problem focused exam of visual system (92012)131 services
3. Established patient complete exam of visual system (92014)33 services
4. Placement of adjustable sutures during eye muscle surgery (67335)32 services
5. New patient complete exam of visual system (92004)31 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%
• High blood pressure63%
• Arthritis56%
• Anxiety28%
• Osteoporosis26%
• Diabetes23%

Hospitals where Joseph L. Demer works

Medicare's Facility Affiliation Data lists Joseph L. Demer 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.

• Ronald Reagan UCLA Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050262

Practice locations

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

• 622 W Duarte Rd, Suite 101Arcadia, CA 91007 (323) 442‑7122

Group practices

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

• Jules Stein Eye Institute Medical Group119 clinicians in the group

Specialties

• Ophthalmologyprimary

Find other Ophthalmology doctors in California →

Other ophthalmologists in Arcadia

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

• Meghana Kalavar, MD
• Saba K. Al-Hashimi, MD
• Tara A. McCannel, MD
• Adrian C. Au, MD
• Cherilyn Mae A. Palochak, MD
• Kenneth Lu, MD
• Meryl Shapiro-Tuchin
• Bartly J. Mondino

All ophthalmologists in Arcadia →

Other clinicians in Jules Stein Eye Institute Medical Group

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

• Meghana Kalavar, MD
• Ronald J. Smith, MD
• Kouros Nourimahdavi, MD
• Alexander S. Fein, MD
• Saba K. Al-Hashimi, MD
• Laura Bonelli, 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