Doctors Unlimited Service Corporation
NPI 1265739643 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Doctors Unlimited Service Corporation is a Internal Medicine Physician organization in Chicago, IL (NPI 1265739643).
Provider details
- NPI number
- 1265739643
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Otuonye Onyewuchi, President/Ceo(773) 933-9300
- License
- 036118945 (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
15 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
Other names (DBA / former)
- Doing business as
- Integracare Clinic
Registry dates
- Enumerated
- 2011-02-19
- Last updated
- 2026-01-15
- Certified
- 2026-01-15
Frequently asked questions
- What is Doctors Unlimited Service Corporation's NPI number?
- Doctors Unlimited Service Corporation's National Provider Identifier (NPI) is 1265739643, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Doctors Unlimited Service Corporation?
- Doctors Unlimited Service Corporation is classified in the NPPES registry as Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Doctors Unlimited Service Corporation located?
- Doctors Unlimited Service Corporation's practice location on file with NPPES is 1750 E 87th St Ste 109, Chicago, IL 60617-2706.
- What is Doctors Unlimited Service Corporation's phone number?
- The practice phone number listed in the NPPES registry for Doctors Unlimited Service Corporation is (773) 933-9300.
- Does Doctors Unlimited Service Corporation accept Medicare?
- Doctors Unlimited Service Corporation 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 Doctors Unlimited Service Corporation?
- The authorized official listed on Doctors Unlimited Service Corporation's NPPES record is Otuonye Onyewuchi, President/Ceo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Doctors Unlimited Service Corporation's NPI active?
- Yes — Doctors Unlimited Service Corporation's NPI (1265739643) is active in the NPPES registry as of the last update on 2026-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.