Matthew S. Zealear, MD

Medicare activity in 2024

Official CMS public-use data for Matthew S. Zealear, 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 problem focused exam of visual system (92012)1,056 services
2. Established patient complete exam of visual system (92014)898 services
3. Imaging of optic nerve (92133)847 services
4. Exam of visual field with extended testing (92083)352 services
5. New patient complete exam of visual system (92004)200 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 pressure62%
• Arthritis49%
• Anxiety23%
• Depression21%
• Ischemic heart disease20%

Hospitals where Matthew S. Zealear works

Medicare's Facility Affiliation Data lists Matthew S. Zealear 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.

• Sierra Nevada Memorial HospitalGrass Valley, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050150

Practice locations

Addresses where Matthew S. Zealear is enrolled with Medicare (CMS data updated October 2, 2026).

• 400 Sierra College Dr, Suite AGrass Valley, CA 95945 (530) 272‑3411
• PO Box, Suite 286Downieville, CA 95936

Group practices

Medicare enrollment lists Matthew S. Zealear as a member of these groups (CMS data updated October 2, 2026).

• Western Sierra Medical Clinic Inc36 clinicians in the group
• Sierra View Medical Eye Inc6 clinicians in the group

Specialties

• Ophthalmologyprimary

Find other Ophthalmology doctors in California →

Other ophthalmologists in California

Clinicians with the same Medicare primary specialty in California — not a recommendation.

• John E. Hagele, MD
• Keith B. Mercer, MD
• Grace M. Richter, MD
• Thomas W. Eck, MD
• Mark S. Humayun, MD
• Anthony J. Skinner, MD
• Leslie J. Weil, MD
• Michael Reynard, MD

All ophthalmologists in California →

Other clinicians in Western Sierra Medical Clinic Inc

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

• Lauren T. Alderdice
• Daniel C. Barry, PA
• Robert E. Olson, PA
• Brenda Mores, NP
• Jessica W. Hamilton, MD
• Faye W. Jensen, 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