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Anesthesiology

Anwuli O. Okoli, MD

Works at hospitals in Oak Lawn, IL · Chicago, IL · Illinois

Summary

Dr. Anwuli O. Okoli, MD is an anesthesiologist at 214 McHenry Rd, Buffalo Grove, IL 60089. Phone: (847) 459-1160. Accepts Medicare assignment. In 2024, Anwuli O. Okoli had 140 Original Medicare patients and 496 services. NPI 1225090533. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Anwuli O. Okoli, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Anwuli O. Okoli accept Medicare assignment?
Yes. Medicare's clinician data says Anwuli O. Okoli accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Anwuli O. Okoli see?
In 2024, CMS data shows 140 Original Medicare patients and 496 services for Anwuli O. Okoli. This counts Original Medicare only and measures volume, not quality.
What is Anwuli O. Okoli's NPI number?
1225090533. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Anwuli O. Okoli, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients140
Services billed to Medicare496
Different services or procedures35
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)100 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)87 services
  3. Injection of substance into lower spine canal using imaging guidance (62323)65 services
  4. Injection of lower or sacral spine facet joint using imaging guidance, single level (64493)29 services
  5. Injection of lower or sacral spine facet joint using imaging guidance, second level (64494)28 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Arthritis75%
  • Diabetes49%
  • Chronic kidney disease42%
  • Depression31%

Hospitals where Anwuli O. Okoli works

Medicare's Facility Affiliation Data lists Anwuli O. Okoli at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Anwuli O. Okoli is enrolled with Medicare (CMS data updated October 2, 2026).

  • 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
  • 4440 W 95th StOak Lawn, IL 60453

Group practices

Medicare enrollment lists Anwuli O. Okoli as a member of this group (CMS data updated October 2, 2026).

  • Advocate Health and Hospitals Corporation3,118 clinicians in the group

Specialties

Find other Anesthesiology doctors in Illinois →

Other anesthesiologists in Buffalo Grove

Clinicians with the same Medicare primary specialty in Buffalo Grove, IL — not a recommendation.

All anesthesiologists in Buffalo Grove →

Other clinicians in Advocate Health and Hospitals Corporation

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year1990 (36 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1225090533
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians