Willowbrook Clinic
NPI 1740368927 · Family Medicine Physician · Downers Grove, IL
Willowbrook Clinic is a Family Medicine Physician organization in Downers Grove, IL (NPI 1740368927).
Provider details
- NPI number
- 1740368927
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Ataullah Arain, Physician(630) 674-1160
- License
- 036054825 (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
- 2006-11-02
- Last updated
- 2008-12-29
Frequently asked questions
- What is Willowbrook Clinic's NPI number?
- Willowbrook Clinic's National Provider Identifier (NPI) is 1740368927, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Willowbrook Clinic?
- Willowbrook Clinic is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Willowbrook Clinic located?
- Willowbrook Clinic's practice location on file with NPPES is 4121 Fairview Ave Ste L2, Downers Grove, IL 60515-2275.
- What is Willowbrook Clinic's phone number?
- The practice phone number listed in the NPPES registry for Willowbrook Clinic is (630) 674-1160.
- Who is the authorized official for Willowbrook Clinic?
- The authorized official listed on Willowbrook Clinic's NPPES record is Ataullah Arain, Physician. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Willowbrook Clinic's NPI active?
- Yes — Willowbrook Clinic's NPI (1740368927) is active in the NPPES registry as of the last update on 2008-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.