Stephen Greenstein
NPI 1801820618 · Pulmonary Disease Physician · Streamwood, IL
Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Greenstein is a Pulmonary Disease Physician provider in Streamwood, IL (NPI 1801820618).
Provider details
- NPI number
- 1801820618
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
- License
- 036051551 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
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
Mailing address
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2012-09-05
Frequently asked questions
- What is Stephen Greenstein's NPI number?
- Stephen Greenstein's National Provider Identifier (NPI) is 1801820618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Greenstein's specialty?
- Stephen Greenstein is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Greenstein located?
- Stephen Greenstein's practice location on file with NPPES is 77 E Irving Park Rd, Streamwood, IL 60107-2930.
- What is Stephen Greenstein's phone number?
- The practice phone number listed in the NPPES registry for Stephen Greenstein is (630) 830-7400.
- Does Stephen Greenstein accept Medicare?
- Stephen Greenstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Greenstein's NPI active?
- Yes — Stephen Greenstein's NPI (1801820618) is active in the NPPES registry as of the last update on 2012-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.