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DR. ISOKEN KOKO MD
NPI 1265465728
Internal Medicine - Hematology & Oncology in River Forest, IL

Active since July 08, 2006PECOS EnrolledAccepts Medicare Assignment
7420 W CENTRAL, CENTER FOR CANCER CARE, RIVER FOREST, IL 60305(708) 763-2700(708) 488-9660 Get Directions Write a Review

NPPES record last updated: January 23, 2017. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Isoken Koko Md NPPES

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

DR. ISOKEN KOKO MD (NPI 1265465728) is an individual hematology & oncology provider in River Forest, Illinois, licensed in Illinois (036100278) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Loyola Gottlieb Memorial Hospital, and is a graduate of Other (1984).

NPPES Registry Identity

NPI1265465728
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameDR. ISOKEN KOKOCredential: MD
Location Address7420 W CENTRAL, CENTER FOR CANCER CARERiver Forest, IL 60305-1800
Mailing Address8961 Enclave DrBurr Ridge, IL 60527-8394 · (630) 794-9475 · Fax (708) 488-9660
Phone(708) 763-2700
Fax(708) 488-9660
Sole ProprietorNo
Medical School CMSOtherGraduated 1984
Enumeration DateJuly 8, 2006
Last NPPES UpdateJanuary 23, 2017
✔ NPI 1265465728 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in IL · 036100278
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
7420 W CENTRAL, River Forest, IL 60305
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Other Identifiers 1

Medicare UPINH14079IL

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Isoken Koko Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4587627252
PECOS Enrollment IDI20041104000725
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Isoken Koko reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Advanced Cancer Care Associates Corp
Same address
Hematology & Oncology
7420 CENTRAL AVE
River Forest, IL 60305
  • Reassigned Medicare billing, Illinois enrollment
NPI 1497577746 (708) 763-2700
Resilience Healthcare - Lakefront Medical Associates, LLC
10.0 mi
General Practice
4646 N MARINE DR
Chicago, IL 60640
  • Reassigned Medicare billing, Illinois enrollment
  • 82 clinicians in this Medicare group
NPI 1205301926 (773) 878-8700
Insight Chicago, Inc.
10 mi
Internal Medicine
2525 S MICHIGAN AVE
Chicago, IL 60616
  • Reassigned Medicare billing, Illinois enrollment
  • 354 clinicians in this Medicare group
NPI 1881261006 (312) 567-2000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 6

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
244 services137 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
162 services123 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
100 services42 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
53 services49 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
33 services33 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
26 services14 patients

Hospital Affiliations CMS Care Compare 5

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Loyola Gottlieb Memorial Hospital

Acute Care Hospitals · Melrose Park, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140008
Location701 West North AveMelrose Park, IL 60160 · Cook County
Emergency services

West Suburban Medical Center

Acute Care Hospitals · Oak Park, IL
1/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140049
Location3 Erie CourtOak Park, IL 60302 · Cook County
Birthing friendly

Rush Oak Park Hospital

Acute Care Hospitals · Oak Park, IL
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number140063
Location520 S Maple AveOak Park, IL 60304 · Cook County
Emergency services

Insight Hospital And Medical Center Chicago

Acute Care Hospitals · Chicago, IL
1/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140158
Location2525 S Michigan AveChicago, IL 60616 · Cook County
Emergency services

Loyola University Medical Center

Acute Care Hospitals · Maywood, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140276
Location2160 S 1st AvenueMaywood, IL 60153 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60305 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$183.39 typical visit price
range $60.08 – $183.39
Typical copayment $45.84 (range $15.02 – $45.84)
Most-billed visit code 99205
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Isoken Koko's NPI number?

The NPI number for Isoken Koko is 1265465728. It was assigned to this individual provider in the NPPES registry on July 8, 2006.

Where is Isoken Koko located?

Isoken Koko practices at 7420 W Central Center For Cancer Care, River Forest, IL 60305. The listed phone number is (708) 763-2700.

What is Isoken Koko's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Isoken Koko enrolled in Medicare?

Yes. Isoken Koko is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Isoken Koko's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Isoken Koko reassigns Medicare benefits to 3 organizations: Advanced Cancer Care Associates Corp (River Forest, IL), Resilience Healthcare - Lakefront Medical Associates, LLC (Chicago, IL) and Insight Chicago, Inc. (Chicago, IL). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Isoken Koko's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Isoken Koko accept?

Health plans from Ambetter Health and Ambetter Health of Delaware list Isoken Koko 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.

Is Isoken Koko affiliated with any hospitals?

According to CMS data, Isoken Koko is affiliated with Loyola Gottlieb Memorial Hospital, West Suburban Medical Center, Rush Oak Park Hospital, Insight Hospital And Medical Center Chicago and Loyola University Medical Center.

When was this NPI record last updated?

The NPPES record for Isoken Koko was last updated on January 23, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.