Annika M. Nilsen, MD

Hospitals where Annika M. Nilsen works

Medicare's Facility Affiliation Data lists Annika M. Nilsen 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 Annika M. Nilsen is enrolled with Medicare (CMS data updated October 2, 2026).

• 250 E Superior, 2304 Nwmff Prent Wmn HospChicago, IL 60611 (312) 472‑3660
• 250 E Superior StChicago, IL 60611
• 675 N Saint Clair StChicago, IL 60611
• 675 N St ClairChicago, IL 60611
• 676 N Saint Clair St, Suite 1310Chicago, IL 60611 (312) 695‑6927

Group practices

Medicare enrollment lists Annika M. Nilsen as a member of this group (CMS data updated October 2, 2026).

• Northwestern Medical Faculty Foundation4,503 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in Illinois →

Other OB-GYNs in Chicago

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

• Robin L. Jones, MD
• Stanley E. Friedell, MD
• Ashley M. Turner, MD
• Elnur Babayev, MD
• Whitney M. Dunn, MD
• Allison M. Pourriahi, MD
• Jayme Castillo, MD
• Nicole Massad, MD

All OB-GYNs in Chicago →

Other clinicians in Northwestern Medical Faculty Foundation

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

• Bhairvi Jani, MD
• Hannah S. Recht, MD
• Stephen Magill, MD
• Daniel M. Derman, MD
• Vikram K. Devisetty, MD
• Geoffery Engel, 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. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
5. Medicare Care Compare — official Medicare tool to look up clinicians