Gerta S. Janss, MD

Medicare activity in 2024

Official CMS public-use data for Gerta S. Janss, 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)1,368 services
2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)793 services
3. Destruction of precancer skin growth, 1 growth (17000)364 services
4. Application of ultraviolet light to skin (96900)323 services
5. Biopsy of related skin growth, first growth (11102)130 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 pressure58%
• Arthritis42%
• Osteoporosis22%
• Diabetes19%
• Ischemic heart disease19%

Hospitals where Gerta S. Janss works

Medicare's Facility Affiliation Data lists Gerta S. Janss 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.

• Northwestern Memorial HospitalChicago, IL · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 140281

Practice locations

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

• 2701 Patriot BlvdGlenview, IL 60026
• 2701 Patriot Blvd, Suite 200Glenview, IL 60026 (312) 926‑6146
• 675 N Saint Clair StChicago, IL 60611
• 675 N St ClairChicago, IL 60611

Group practices

Medicare enrollment lists Gerta S. Janss as a member of this group (CMS data updated October 2, 2026).

• Northwestern Medical Faculty Foundation4,503 clinicians in the group

Specialties

• Dermatologyprimary

Find other Dermatology doctors in Illinois →

Other dermatologists in Glenview

Clinicians with the same Medicare primary specialty in Glenview, IL — not a recommendation.

• Jason B. Waldinger, MD
• Lady C. Dy, MD
• Stephanie L. Mehlis, MD
• Brigitte F. Utter, MD
• Avni Patel
• Renata T. Brindise, DO
• Jessica L. Borowicz, DO
• Brooke D. Cui, MD

All dermatologists in Glenview →

Other clinicians in Northwestern Medical Faculty Foundation

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

• Asem H. Rahman, MD
• Bich N. Pham
• George E. Dephillips, MD
• Danielle Hall
• Jay L. Mathur, MD
• Jeremy J. Larva

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