Nancy Greenspon, MD
NPI 1891212999 · Anesthesiology Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nancy Greenspon, MD is a Anesthesiology Physician provider in Chicago, IL (NPI 1891212999).
Provider details
- NPI number
- 1891212999
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
8 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
3 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 (2)
- 240 E Huron St Ste 1-200Chicago, IL 60611-2909Phone: (312) 503-7975
- 240 E Huron St Ste 1-200Chicago, IL 60611-2909Phone: (312) 503-7975
Registry dates
- Enumerated
- 2017-08-29
- Last updated
- 2021-06-08
- Certified
- 2021-06-08
Frequently asked questions
- What is Nancy Greenspon's NPI number?
- Nancy Greenspon's National Provider Identifier (NPI) is 1891212999, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nancy Greenspon's specialty?
- Nancy Greenspon is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Nancy Greenspon located?
- Nancy Greenspon's practice location on file with NPPES is 251 E Huron St, Chicago, IL 60611-2908.
- What is Nancy Greenspon's phone number?
- The practice phone number listed in the NPPES registry for Nancy Greenspon is (312) 926-2000.
- Does Nancy Greenspon accept Medicare?
- Nancy Greenspon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nancy Greenspon's NPI active?
- Yes — Nancy Greenspon's NPI (1891212999) is active in the NPPES registry as of the last update on 2021-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.