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DOCTORS UNLIMITED SERVICE CORPORATION
NPI 1265739643
Internal Medicine in Chicago, IL

Active since February 19, 2011
1750 E 87TH ST STE 109, CHICAGO, IL 60617(773) 933-9300(773) 933-9302 Get Directions Write a Review

NPPES record last updated: January 15, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jan 15, 2026, Nov 10, 2020 (2 updates tracked since 2020).

About Doctors Unlimited Service Corporation NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DOCTORS UNLIMITED SERVICE CORPORATION (NPI 1265739643), doing business as Integracare Clinic, is a healthcare organization registered as an internal medicine in Chicago, Illinois and active in the NPI registry since February 2011. The organization lists Otuonye Ezeribe Onyewuchi, President/ceo, as its authorized official.

NPPES Registry Identity

NPI1265739643
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameDOCTORS UNLIMITED SERVICE CORPORATION
Location Address1750 E 87TH ST STE 109Chicago, IL 60617-2706
Mailing AddressPo Box 806112Chicago, IL 60680-4122 · (773) 933-9300 · Fax (773) 933-9302
Phone(773) 933-9300
Fax(773) 933-9302
Organization SubpartNo
Authorized OfficialOtuonye Ezeribe OnyewuchiPresident/ceo · (773) 933-9300
Enumeration DateFebruary 19, 2011
Last NPPES UpdateJanuary 15, 20262 updates tracked since enumeration
NPPES CertifiedJanuary 15, 2026
✔ NPI 1265739643 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 036118945
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
1750 E 87TH ST STE 109, Chicago, IL 60617
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Other Names 1

Doing Business AsIntegracare Clinic

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.Insurance ›

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SAARAH ALKHAIRY MD, MBA
Psychiatry & Neurology (Psychiatry)
1750 E 87TH ST STE 109
CHICAGO, IL 60617
Cook County (312) 489-0103
CHINDIKA HEALTHCARE INC.
Psychiatry & Neurology (Psychiatry)
1750 E 87TH ST STE 109
CHICAGO, IL 60617
Cook County (312) 489-0103
DR. OTUONYE E ONYEWUCHI MD, MPH
Internal Medicine
1750 E 87TH ST STE 109
CHICAGO, IL 60617
Cook County (773) 933-9300
MRS. CECILIA CHIDINMA ISIOMA NP
Nurse Practitioner (Psychiatric/Mental Health)
1750 E 87TH ST STE 109
CHICAGO, IL 60617
Cook County (312) 489-0103

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Doctors Unlimited Service Corporation's NPI number?

The NPI number for Doctors Unlimited Service Corporation is 1265739643. It was assigned to this organization in the NPPES registry on February 19, 2011. The provider is doing business as Integracare Clinic.

Where is Doctors Unlimited Service Corporation located?

Doctors Unlimited Service Corporation is located at 1750 E 87th St Ste 109, Chicago, IL 60617. The listed phone number is (773) 933-9300.

What is Doctors Unlimited Service Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

What insurance does Doctors Unlimited Service Corporation accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Doctors Unlimited Service Corporation as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Doctors Unlimited Service Corporation was last updated on January 15, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.