Transfus Clin Biol
AnemiaAnemia, Sickle CellBlood Transfusion
Dr. Isoken Koko, MD
NPI1265465728PAC ID4587627252
- Medicare services, 2024
- 618
- Medicare patients, 2024
- 270
- Part D claims, 2024
- 1,274
- Publications
- 3
- Clinical trials
- 29
- Practice address
- 3 Erie Ct, Oak Park, IL 60302
- Practice phone
- Call (708) 383-6200
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
West Suburban Medical Center (CLOSED)
Oak Park, Illinois
Find Dr. Koko's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Isoken Koko is a hematologist and oncologist in Oak Park, Illinois
Dr. Koko practices at West Suburban Medical Center (CLOSED) in Oak Park, Illinois.
Dr. Koko's NPI, 1265465728, was assigned on July 8, 2006. Dr. Koko graduated from University of Benin Faculty of Medicine in 1985. Dr. Koko holds Illinois license 036100278.
NPI and contact details
- NPI
- 1265465728NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4587627252
- NPI enumeration date
- July 8, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (708) 383-6200
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 68
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Isoken Koko practices at West Suburban Medical Center (CLOSED) in Oak Park, Illinois
Dr. Koko's primary practice is West Suburban Medical Center (CLOSED), at 3 Erie Ct, Oak Park, IL 60302 in Cook County. The practice phone is (708) 383-6200.
- West Suburban Medical Center (CLOSED)3 Erie Ct, Oak Park, IL 60302 · Cook CountyPhone(708) 383-6200
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Isoken Koko is affiliated with 7 sites of care and 2 medical groups
Dr. Koko's primary practice is West Suburban Medical Center (CLOSED) in Oak Park, Illinois. Dr. Koko is also affiliated with West Suburban Medical Center. The medical group on file is Chicago Health Medical Group. Dmand AI also links Dr. Koko to 4 more hospitals, 1 physician office and 1 medical group, each named with a free account.
West Suburban Medical Center (CLOSED)Primary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Isoken Koko's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Koko practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| West Suburban Medical Center (CLOSED) | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Isoken Koko is one of 563 hematologists and oncologists in Illinois
Hematology and oncology is Dr. Koko's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Koko is board certified in hematology by the American Board of Internal Medicine. Dr. Koko is licensed in Illinois.
Specialties and state licenses
- Hematology and oncology, IllinoisPrimary
Clinical focus
Dmand AI lists breast cancer, chronic anemia, chronic leukemia, colorectal cancer, deep vein thrombosis (DVT), lung cancer, lymphoma and multiple myeloma among the conditions Dr. Koko treats.
Hematologists and oncologists near Dr. Koko
Counts of hematologists and oncologists with a Dmand AI profile, by place and practice. Each opens the list.
563hematologists and oncologists in Illinois
3hematologists and oncologists in Oak Park
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Isoken Koko billed Medicare for 618 services in 2024
CMS data shows 618 Medicare services from Dr. Koko across 6 procedure codes in 2024, for 270 Medicare patients. Medicare paid $54,891 for them.
Medicare services, 2024618
Medicare patients270
Paid by Medicare$54,891
Procedure codes6
Dr. Koko's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7292024: 61815%
Where Dr. Koko's Medicare services took place, 2024
- In an office43971%
- In a facility17929%
Dr. Koko compared with the Illinois median for hematologists and oncologists, 2024
- Dr. Koko
- Illinois median
- Medicare services
- 618vs 1,05641% below
- Medicare patients
- 270vs 282Close to median
- Part D claims
- 1,044vs 3283.2 times
Medians across 547 hematologists and oncologists in Illinois with Dmand AI profiles that report each measure.
Dr. Koko's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Koko?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Koko and other hematologists and oncologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Isoken Koko treated 270 Medicare patients in 2024, average age 74
CMS counts 270 Medicare patients who saw Dr. Koko in 2024. The largest group is 65 to 74, with 115 patients. 75% of them have high blood pressure, and 73% have high cholesterol. 42% are also on Medicaid. Their average risk score is 2.00, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Koko's median patient age at 68, with 74% women.
Medicare patients, 2024270
Average age74
Average risk score2.00
Also on Medicaid42%
Dr. Koko's Medicare patients by age, 2024
Dr. Koko's Medicare patients by sex, 2024
- Women18870%
- Men8230%
Chronic conditions among Dr. Koko's Medicare patients, 2024
- High blood pressure75%
- High cholesterol73%
- Cancer57%
- Arthritis50%
- Diabetes46%
- Ischemic heart disease38%
- Chronic kidney disease37%
- Heart failure32%
Share of Medicare patients with each condition. A patient can have several.
Dr. Koko's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women74%
- Men25%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Isoken Koko wrote 1,274 Medicare Part D claims in 2024
In 2024, Dr. Koko wrote 1,274 Medicare Part D claims for 217 patients. 63% of them were for generic drugs. CMS names the drug for 1,044 of them, across 37 drugs with 11 or more claims each, at $4,399,353 in total drug cost. In 2023, CMS named 1,133 claims across 36 drugs.
Part D claims, 20241,274
Drugs named by CMS37
Total drug cost$4.4M
Part D patients217
Dr. Koko's Part D claims by kind of drug, 2024
- Generic801 claims63%
- Brand-name473 claims37%
Dr. Koko's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Koko's Part D claims, 2024
- Opioids7%90 of 1,274 claims
- Antibiotics1%17 of 1,274 claims
- Antipsychotics, patients 65 and over1%13 of 1,274 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1332024: 1,0448%
Drugs named by CMS: 37 in 2024, 36 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Isoken Koko takes part in Medicare
Dr. Koko accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Isoken Koko has 3 publications on record
Dmand AI links 3 papers to Dr. Koko in 2009.
Papers3
Recent publications by Dr. Koko
Bull Soc Pathol Exot
AcyclovirAnemia, Hemolytic, AutoimmuneAntibiotics, Antineoplastic
Tunis Med
CongoPedigreeThrombasthenia
See who Dr. Koko researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Koko works with, so you can find a warm path to the right hematologists and oncologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Isoken Koko has worked on 29 clinical trials
Dmand AI links Dr. Koko to 29 clinical trials, 17 of them phase 3 studies. 14 are still active or recruiting. Conditions studied include Breast Neoplasms, Breast Diseases and Breast Carcinoma In Situ. National Cancer Institute (NCI) sponsors the most, 14.
Clinical trials with Dr. Koko by phase
- NonePhase 1: no trials
- 8Phase 2: 8 trials
- 2Phase 2/3: 2 trials
- 17Phase 3: 17 trials
- NonePhase 4: no trials
Conditions in Dr. Koko's trials
- Breast Neoplasms
- Breast Diseases
- Breast Carcinoma In Situ
- Breast Neoplasms, Male
- Colonic Neoplasms
Investigators on the most trials with Dr. Koko
- Preston D. Steen, MD13 shared trials
- Gilbert D. A. Padula, MD12 shared trials
- James H. Feusner, MD11 shared trials
Recent clinical trials with Dr. Koko
NCI COVID-19 in Cancer Patients Study (NCCAPS): A Longitudinal Natural History Study (opens in a new tab)
Active, not recruiting
COVID-19Pneumonia, Viral
Testing the Effects of MK-3475 (Pembrolizumab) With or Without the Usual Chemotherapy Treatment for Patients 70 Years of Age and Older With Advanced Non-small Cell Lung Cancer (opens in a new tab)
Active, not recruitingPhase 2
Adenocarcinoma of LungCarcinoma, Non-Small-Cell LungPembrolizumabCarboplatinPemetrexed
Duloxetine to Prevent Oxaliplatin-Induced Peripheral Neuropathy in Patients with Stage II-III Colorectal Cancer (opens in a new tab)
Active, not recruitingPhase 2/3
Rectal DiseasesColorectal NeoplasmsDuloxetineOxaliplatinDuloxetine Hydrochloride
Circulating Tumor DNA Testing in Predicting Treatment for Patients With Stage IIA Colon Cancer After Surgery (opens in a new tab)
Active, not recruitingPhase 2/3
Colonic NeoplasmsColorectal NeoplasmsCapecitabineFluorouracilLeucovorin
Testing MK-3475 (Pembrolizumab) After Surgery for Localized Muscle-Invasive Bladder Cancer and Locally Advanced Urothelial Cancer (opens in a new tab)
Active, not recruitingPhase 3
Ureteral NeoplasmsUreteral DiseasesPembrolizumab
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Isoken Koko received $43,664 in industry payments from 2016 to 2025
CMS Open Payments shows 868 general payments to Dr. Koko from 58 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 54% of the total. Janssen Pharmaceuticals, Inc paid the most, $9,125.
General payments to Dr. Koko by program year, 2016 to 2025
General payments to Dr. Koko by kind, 2016 to 2025
$43.7Kin total
- Consulting fees$23,51854%
- Food and beverage$15,92036%
- Travel and lodging$2,3065%
- Education$1,9214%
Companies that paid Dr. Koko the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Isoken Koko has 1 award and honors on record
Dmand AI lists 1 award for Dr. Koko, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Koko
- 2013
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Isoken Koko graduated from University of Benin Faculty of Medicine
Dr. Koko graduated from University of Benin Faculty of Medicine in 1985. Dr. Koko is a member of ASCO.
- Medical school
- Board certified in hematology
- Board certified in internal medicine
- Board certified in medical oncology
Source: Dmand AI Professional Profile Data
Dr. Isoken Koko accepts plans from 16 insurance carriers
Dr. Koko is in network with 16 carriers, including Aetna, HCSC and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
- Aetna
- HCSC
- Blue Cross Blue Shield of Michigan
- Cigna
- United Healthcare
- Elevance
- Blue Cross Blue Shield of Massachusetts
- Molina
- +8 more carriersWith a free account
Plan types Dr. Koko accepts, by number of carriers
- PPO10
- Medicare9
- HMO8
- POS6
- EPO4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Isoken Koko's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Isoken Koko
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Isoken Koko's NPI number?
Dr. Isoken Koko's NPI number is 1265465728. It was assigned on July 8, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Isoken Koko?
Dr. Isoken Koko is a hematologist and oncologist in Oak Park, Illinois. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Isoken Koko practice?
Dr. Koko practices at 3 Erie Ct, Oak Park, IL 60302. Dr. Koko's primary practice is West Suburban Medical Center (CLOSED) in Oak Park, Illinois. Dmand AI also links Dr. Koko to 4 hospitals, 1 physician office and 1 medical group.
What is Dr. Isoken Koko's office phone number?
The practice phone on file for Dr. Koko is (708) 383-6200.
What is Dr. Isoken Koko's medical license number?
Dr. Koko holds Illinois license 036100278.
Which hospitals is Dr. Isoken Koko affiliated with?
Dr. Koko is affiliated with West Suburban Medical Center. Dmand AI links Dr. Koko to 4 more hospitals.
What medical group is Dr. Isoken Koko part of?
Dr. Koko is linked to Chicago Health Medical Group. Dmand AI links Dr. Koko to 1 more medical group.
Does Dr. Isoken Koko accept Medicare?
Yes. CMS data shows Dr. Koko billed Medicare for 618 services in 2024, and Dr. Koko accepts Medicare assignment.
How many Medicare patients does Dr. Isoken Koko see?
CMS counts 270 Medicare patients who saw Dr. Koko in 2024, with an average age of 74.
Is Dr. Isoken Koko board certified?
Yes. Dr. Koko is board certified in hematology by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
What services does Dr. Isoken Koko bill to Medicare?
In 2024, Dr. Koko's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and hospital inpatient care (99233).
Where did Dr. Isoken Koko go to medical school?
Dr. Koko graduated from University of Benin Faculty of Medicine in 1985.
What drugs does Dr. Isoken Koko prescribe most?
In 2024 Medicare Part D data, Dr. Koko's most prescribed drugs by claims were Anastrozole, Eliquis and Letrozole.
Has Dr. Isoken Koko received payments from drug or device companies?
CMS Open Payments shows $43,664 in general payments to Dr. Koko from 58 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. Isoken Koko been practicing?
Dr. Koko graduated from medical school in 1985, 41 years ago.
Does Dr. Isoken Koko do research?
Dmand AI links 3 publications to Dr. Koko. Dr. Koko has worked on 29 clinical trials.
What insurance does Dr. Isoken Koko accept?
Dr. Koko is in network with 16 carriers, including Aetna, HCSC and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 10. Check the plan with the practice before a visit.
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