OrganizationActive
Aaron Greenspan, M.D.
NPI 1699897199 · Family Medicine Physician · Chicago, IL
Aaron Greenspan, M.D. is a Family Medicine Physician organization in Chicago, IL (NPI 1699897199).
Provider details
- NPI number
- 1699897199
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Aaron Greenspan, Medical Director(847) 897-5995
- License
- 036101234 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
850 W Irving Park Rd
Chicago, IL 60613-3077
Phone: (773) 525-6780
Street-level locationGet directions
Mailing address
850 W Irving Park Rd
Chicago, IL 60613-3077
Registry dates
- Enumerated
- 2007-04-04
- Last updated
- 2008-12-02
Frequently asked questions
- What is Aaron Greenspan, M.D.'s NPI number?
- Aaron Greenspan, M.D.'s National Provider Identifier (NPI) is 1699897199, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Aaron Greenspan, M.D.?
- Aaron Greenspan, M.D. is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Aaron Greenspan, M.D. located?
- Aaron Greenspan, M.D.'s practice location on file with NPPES is 850 W Irving Park Rd, Chicago, IL 60613-3077.
- What is Aaron Greenspan, M.D.'s phone number?
- The practice phone number listed in the NPPES registry for Aaron Greenspan, M.D. is (773) 525-6780.
- Who is the authorized official for Aaron Greenspan, M.D.?
- The authorized official listed on Aaron Greenspan, M.D.'s NPPES record is Aaron Greenspan, Medical Director. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Aaron Greenspan, M.D.'s NPI active?
- Yes — Aaron Greenspan, M.D.'s NPI (1699897199) is active in the NPPES registry as of the last update on 2008-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.