Chestnut Health of Illinois LLC
NPI 1588043939 · Internal Medicine Physician · Elgin, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chestnut Health of Illinois LLC is a Internal Medicine Physician organization in Elgin, IL (NPI 1588043939).
Provider details
- NPI number
- 1588043939
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Omair Siraj, Ceo(703) 964-8199
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
11 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
- 2015-05-19
- Last updated
- 2022-05-27
- Certified
- 2022-05-27
Frequently asked questions
- What is Chestnut Health of Illinois LLC's NPI number?
- Chestnut Health of Illinois LLC's National Provider Identifier (NPI) is 1588043939, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Chestnut Health of Illinois LLC?
- Chestnut Health of Illinois LLC is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Chestnut Health of Illinois LLC located?
- Chestnut Health of Illinois LLC's practice location on file with NPPES is 1530 N Randall Rd, Elgin, IL 60123-7877.
- What is Chestnut Health of Illinois LLC's phone number?
- The practice phone number listed in the NPPES registry for Chestnut Health of Illinois LLC is (224) 760-7322.
- Does Chestnut Health of Illinois LLC accept Medicare?
- Chestnut Health of Illinois LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Chestnut Health of Illinois LLC?
- The authorized official listed on Chestnut Health of Illinois LLC's NPPES record is Omair Siraj, Ceo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Chestnut Health of Illinois LLC's NPI active?
- Yes — Chestnut Health of Illinois LLC's NPI (1588043939) is active in the NPPES registry as of the last update on 2022-05-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.