Maren Leibowitz, MD
NPI 1861951907 · Emergency Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maren Leibowitz, MD is a Emergency Medicine Physician provider in Chicago, IL (NPI 1861951907).
Provider details
- NPI number
- 1861951907
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 036159100 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 211 E Ontario St Ste 200Chicago, IL 60611-3284Phone: (312) 694-7000Fax: (312) 926-6274
Registry dates
- Enumerated
- 2019-03-18
- Last updated
- 2025-06-03
- Certified
- 2025-06-03
Frequently asked questions
- What is Maren Leibowitz's NPI number?
- Maren Leibowitz's National Provider Identifier (NPI) is 1861951907, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maren Leibowitz's specialty?
- Maren Leibowitz is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Maren Leibowitz located?
- Maren Leibowitz's practice location on file with NPPES is 251 E Huron St, Chicago, IL 60611-3055.
- What is Maren Leibowitz's phone number?
- The practice phone number listed in the NPPES registry for Maren Leibowitz is (312) 926-2000.
- Does Maren Leibowitz accept Medicare?
- Maren Leibowitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maren Leibowitz's NPI active?
- Yes — Maren Leibowitz's NPI (1861951907) is active in the NPPES registry as of the last update on 2025-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.