Dr. Eugene R. Ahn, MD

  • Maywood, IL
  • Medical oncologist
NPI1093911307PAC ID2163511890
Medicare services, 2024
92
Medicare patients, 2024
80
Part D claims, 2024
185
Publications
46
Clinical trials
11
Practice address
2160 S 1st Avenue, Maywood, IL 60153
Practice phone
Call (708) 216-3299
Professional email
Get professional email
Personal email
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Mobile number
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Social profiles

Primary practice

Loyola Medicine Pediatric Mobile Health Unit

Mobile Lab · Maywood, Illinois

See all 5 affiliations

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Dr. Eugene R. Ahn is a medical oncologist in Maywood, Illinois

Dr. Ahn practices at Loyola Medicine Pediatric Mobile Health Unit in Maywood, Illinois.

Dr. Ahn's NPI, 1093911307, was assigned on June 23, 2007. Dr. Ahn graduated from University of Miami, Miller School of Medicine in 1997. Dr. Ahn holds Illinois license 036.136519.

NPI and contact details
Medicare PAC ID
2163511890
NPI enumeration date
June 23, 2007
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(708) 216-3299
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
55
Medical school graduation
1997

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Eugene R. Ahn practices at Loyola Medicine Pediatric Mobile Health Unit in Maywood, Illinois

Dr. Ahn's primary practice is Loyola Medicine Pediatric Mobile Health Unit, at 2160 S 1st Avenue, Maywood, IL 60153. The practice phone is (708) 216-3299.

  • Loyola Medicine Pediatric Mobile Health Unit
    2160 S 1st Avenue, Maywood, IL 60153Phone(708) 216-3299

Source: Dmand AI Affiliation Data

Dr. Eugene R. Ahn is affiliated with 3 sites of care and 2 medical groups

Dr. Ahn's primary practice is Loyola Medicine Pediatric Mobile Health Unit in Maywood, Illinois. Dr. Ahn is also affiliated with Loyola University Medical Center. The medical group on file is Loyola University Medical Center. Dmand AI also links Dr. Ahn to 1 more group practice or clinic and 1 medical group, each named with a free account. Dr. Ahn's employer is on file too: a clinical lab.

See all 5 affiliations for Dr. Ahn

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Eugene R. Ahn's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ahn practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Loyola Medicine Pediatric Mobile Health UnitAvailable with a free account
+2 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Eugene R. Ahn is one of 153 medical oncologists in Illinois

Medical oncology is Dr. Ahn's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Ahn is board certified in infectious disease by the American Board of Internal Medicine. Dmand AI has Dr. Ahn's licenses on file in 4 states: Illinois, Iowa, Florida and Utah.

Specialties and state licenses

  • Medical oncology, IllinoisPrimaryLicense 036.136519 · 2014 to 2026 · taxonomy 207RX0202X
  • Iowa license2020 to 2023
  • Florida licenseLicense ME92099 · 2004 to 2015
  • Utah license1998 to 2000

Clinical focus

Dmand AI lists breast cancer and lung cancer among the conditions Dr. Ahn treats.

Medical oncologists near Dr. Ahn

Counts of medical oncologists with a Dmand AI profile, by place and practice. Each opens the list.

153medical oncologists in Illinois
2medical oncologists in Maywood

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Eugene R. Ahn billed Medicare for 92 services in 2024

CMS data shows 92 Medicare services from Dr. Ahn across 3 procedure codes in 2024, all of them office visits, for 80 Medicare patients. Medicare paid $8,519 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 202492
Medicare patients80
Paid by Medicare$8,519
Procedure codes3

Dr. Ahn's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 2392024: 9262%

Dr. Ahn compared with the Illinois median for medical oncologists, 2024

  • Dr. Ahn
  • Illinois median
Medicare services
92vs 67186% below
Medicare patients
80vs 23065% below
Part D claims
107vs 34569% below

Medians across 140 medical oncologists in Illinois with Dmand AI profiles that report each measure.

Dr. Ahn'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.

See all procedures by Dr. Ahn

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Eugene R. Ahn treated 80 Medicare patients in 2024, average age 71

CMS counts 80 Medicare patients who saw Dr. Ahn in 2024. The largest group is 65 to 74, with 40 patients. 75% of them have cancer, and 65% have high blood pressure. Their average risk score is 2.03, 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. Ahn's median patient age at 71, with 77% women.

Medicare patients, 202480
Average age71
Average risk score2.03

Dr. Ahn's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Chronic conditions among Dr. Ahn's Medicare patients, 2024

  1. Cancer75%
  2. High blood pressure65%
  3. High cholesterol59%
  4. Arthritis45%
  5. Mood disorders30%
  6. Diabetes28%
  7. Depression26%
  8. Chronic kidney disease23%

Share of Medicare patients with each condition. A patient can have several.

Dr. Ahn's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women77%
  • Men21%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Eugene R. Ahn wrote 185 Medicare Part D claims in 2024

In 2024, Dr. Ahn wrote 185 Medicare Part D claims for 60 patients. 86% of them were for generic drugs. CMS names the drug for 107 of them, across 4 drugs with 11 or more claims each, at $195,436 in total drug cost. In 2023, CMS named 181 claims across 5 drugs.

Part D claims, 2024185
Drugs named by CMS4
Total drug cost$195,436
Part D patients60

Dr. Ahn's Part D claims by kind of drug, 2024

  • Generic160 claims86%
  • Brand-name25 claims14%

Dr. Ahn'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.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1812024: 10741%

Drugs named by CMS: 4 in 2024, 5 in 2023.

See all prescribing by Dr. Ahn

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. Eugene R. Ahn takes part in Medicare

Dr. Ahn 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. Eugene R. Ahn has 46 publications on record

Dmand AI links 46 papers to Dr. Ahn, published from 2008 to 2024. 2023 was the busiest year, with 4. The most frequent topics are Antineoplastic Agents, Receptor, ErbB-2 and Antineoplastic Combined Chemotherapy Protocols. Dr. Ahn has published most often in JCO Precis Oncol. Dr. Ahn's most frequent co-authors are Richard L. Schilsky, MD, Yeon S. Ahn, MD and Ramya Thota, MBBS.

Papers46
Years published2008 to 2024

Dr. Ahn's papers by year, 2012 to 2024

Topics Dr. Ahn writes about most

  • Antineoplastic Agents
  • Receptor, ErbB-2
  • Antineoplastic Combined Chemotherapy Protocols
  • Purpura, Thrombocytopenic, Idiopathic
  • Colorectal Neoplasms
  • Trastuzumab
  • Antibodies, Monoclonal, Humanized
  • Breast Neoplasms

Dr. Ahn's most frequent co-authors

Recent publications by Dr. Ahn

See all 46 publications and co-authors

See who Dr. Ahn researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ahn works with, so you can find a warm path to the right medical oncologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Eugene R. Ahn has worked on 11 clinical trials

Dmand AI links Dr. Ahn to 11 clinical trials, 5 of them phase 2 studies. 5 are still active or recruiting. Conditions studied include Breast Neoplasms, Breast Diseases and Thyroid Cancer, Papillary. Eli Lilly and Company sponsors the most, 2. Open Payments lists research payments to Dr. Ahn that name 1 trial.

Clinical trials with Dr. Ahn by phase

  1. 1Phase 1: 1 trial
  2. 5Phase 2: 5 trials
  3. 2Phase 3: 2 trials
  4. NonePhase 4: no trials

Conditions in Dr. Ahn's trials

  • Breast Neoplasms
  • Breast Diseases
  • Thyroid Cancer, Papillary
  • Brain Neoplasms
  • Carcinoma, Medullary

Investigators on the most trials with Dr. Ahn

Recent clinical trials with Dr. Ahn

See all 11 clinical trials and co-investigators

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Eugene R. Ahn received $7,833 in industry payments from 2016 to 2023

CMS Open Payments shows 380 general payments to Dr. Ahn from 34 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 76% of the total. R-Pharm US LLC paid the most, $2,027. It also lists 1 research payment totaling $500 in 2021, naming 1 clinical trial.

General payments to Dr. Ahn by program year, 2016 to 2023

General payments to Dr. Ahn by kind, 2016 to 2023

$7.8Kin total
  • Food and beverage$5,94076%
  • Travel and lodging$1,75822%
  • Education$1362%

Companies that paid Dr. Ahn the most, 2016 to 2023

Share is of all general payments to this clinician.

See all payments to Dr. Ahn

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Eugene R. Ahn graduated from University of Miami, Miller School of Medicine

Dr. Ahn graduated from University of Miami, Miller School of Medicine in 1997. Dr. Ahn is a member of ASCO, NRG Oncology and Society of Integrative Oncology.

  1. Medical schoolUniversity of Miami, Miller School of Medicine
  2. Board certified in infectious diseaseAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Eugene R. Ahn accepts plans from 12 insurance carriers

Dr. Ahn is in network with 12 carriers, including Aetna, HCSC and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

  • Aetna
  • HCSC
  • Blue Cross Blue Shield of Michigan
  • United Healthcare
  • Blue Cross Blue Shield of Massachusetts
  • Molina
  • Regence Health Plans
  • Alliant Health Plans
  • +4 more carriersWith a free account

Plan types Dr. Ahn accepts, by number of carriers

  1. Medicare8
  2. HMO7
  3. PPO7
  4. POS4
  5. Medicaid2
  6. EPO1

Source: Dmand AI Insurance Network Data

Sources for Dr. Eugene R. Ahn's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Eugene R. Ahn

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. Eugene R. Ahn's NPI number?

Dr. Eugene R. Ahn's NPI number is 1093911307. It was assigned on June 23, 2007, and it is active in the NPI Registry.

What kind of doctor is Dr. Eugene R. Ahn?

Dr. Eugene R. Ahn is a medical oncologist in Maywood, Illinois. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).

Where does Dr. Eugene R. Ahn practice?

Dr. Ahn practices at 2160 S 1st Avenue, Maywood, IL 60153. Dr. Ahn's primary practice is Loyola Medicine Pediatric Mobile Health Unit in Maywood, Illinois. Dmand AI also links Dr. Ahn to 1 group practice or clinic and 1 medical group.

What is Dr. Eugene R. Ahn's office phone number?

The practice phone on file for Dr. Ahn is (708) 216-3299.

What is Dr. Eugene R. Ahn's medical license number?

Dr. Ahn holds Illinois license 036.136519, one of the licenses on file in 4 states.

Which states has Dr. Eugene R. Ahn been licensed in?

Dmand AI has state licenses on file for Dr. Ahn in Illinois (2014 to 2026), Iowa (2020 to 2023), Florida (2004 to 2015) and Utah (1998 to 2000).

Which hospitals is Dr. Eugene R. Ahn affiliated with?

Dr. Ahn is affiliated with Loyola University Medical Center.

What medical group is Dr. Eugene R. Ahn part of?

Dr. Ahn is linked to Loyola University Medical Center. Dmand AI links Dr. Ahn to 1 more medical group.

Does Dr. Eugene R. Ahn accept Medicare?

Yes. CMS data shows Dr. Ahn billed Medicare for 92 services in 2024, and Dr. Ahn accepts Medicare assignment.

How many Medicare patients does Dr. Eugene R. Ahn see?

CMS counts 80 Medicare patients who saw Dr. Ahn in 2024, with an average age of 71.

Show 9 more questionsShow fewer questions

Is Dr. Eugene R. Ahn board certified?

Yes. Dr. Ahn is board certified in infectious disease by the American Board of Internal Medicine.

What services does Dr. Eugene R. Ahn bill to Medicare?

In 2024, Dr. Ahn's most billed Medicare services were office visit, established patient (99215), office visit, established patient (99214) and office visit, new patient (99205).

Where did Dr. Eugene R. Ahn go to medical school?

Dr. Ahn graduated from University of Miami, Miller School of Medicine in 1997.

What drugs does Dr. Eugene R. Ahn prescribe most?

In 2024 Medicare Part D data, Dr. Ahn's most prescribed drugs by claims were Tamoxifen Citrate, Letrozole and Anastrozole.

Has Dr. Eugene R. Ahn received payments from drug or device companies?

CMS Open Payments shows $7,833 in general payments to Dr. Ahn from 34 companies from 2016 to 2023. The largest total came from R-Pharm US LLC.

How long has Dr. Eugene R. Ahn been practicing?

Dr. Ahn graduated from medical school in 1997, 29 years ago.

Does Dr. Eugene R. Ahn do research?

Dmand AI links 46 publications to Dr. Ahn, published from 2008 to 2024. Dr. Ahn has worked on 11 clinical trials.

Who does Dr. Eugene R. Ahn publish with?

Dr. Ahn's most frequent co-authors are Richard L. Schilsky, MD (13 shared papers), Yeon S. Ahn, MD (11 shared papers) and Ramya Thota, MBBS (7 shared papers).

What insurance does Dr. Eugene R. Ahn accept?

Dr. Ahn is in network with 12 carriers, including Aetna, HCSC and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

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