Cathryn Z. Zhang, MD

Medicare activity in 2024

Official CMS public-use data for Cathryn Z. Zhang, 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. Destruction of precancer skin growth, 2-14 growths (17003)530 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)436 services
3. Destruction of precancer skin growth, 1 growth (17000)272 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)267 services
5. Destruction of skin growth, 1-14 growths (17110)179 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 cholesterol60%
• High blood pressure52%
• Arthritis36%
• Osteoporosis18%
• Depression17%
• Anxiety17%

Hospitals where Cathryn Z. Zhang works

Medicare's Facility Affiliation Data lists Cathryn Z. Zhang 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.

• Virginia Mason Medical CenterSeattle, WA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 500005

Practice locations

Addresses where Cathryn Z. Zhang is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.

• 100 NE Gilman BlvdIssaquah, WA 98027 (425) 557‑8000
• 1100 9th AveSeattle, WA 98101
• 2671 NE 46th StSeattle, WA 98105 (206) 525‑8000
• 33501 1st Way SFederal Way, WA 98003 (253) 838‑2400
• 4575 Sand Point Way NE, Suite 108Seattle, WA 98105 (206) 525‑8000

Group practices

Medicare enrollment lists Cathryn Z. Zhang as a member of this group (CMS data updated October 2, 2026).

• Virginia Mason Medical Center867 clinicians in the group

Specialties

• Dermatologyprimary

Find other Dermatology doctors in Washington →

Other dermatologists in Issaquah

Clinicians with the same Medicare primary specialty in Issaquah, WA — not a recommendation.

• Ulrike I. Ochs, MD
• Arlo Miller, MD
• Victor R. Michalak, MD

All dermatologists in Issaquah →

Other clinicians in Virginia Mason Medical Center

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

• Alvaro Lucioni, MD
• Andrew N. Nguyen, MD
• Edward F. Dropcho, MD
• Alvin T. Ngan, DPM
• Vivian V. Stone, MD
• Stephanie L. Harper, 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