Dr. John Michael Cahill, MD
- Medicare services, 2024
- 5,471
- Medicare patients, 2024
- 1,477
- Part D claims, 2024
- 7,790
- Hospital affiliations
- 1
- Industry payments
- $6,649
- Practice address
- 801 South Washington, Naperville, IL 60540
- Practice phone
- Call (630) 527-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Cahill's professional email, personal email and mobile number
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Dr. John Michael Cahill is an interventional cardiologist in Naperville, Illinois
Dr. Cahill practices at Edward Hospital in Naperville, Illinois, part of Endeavor Health.
Dr. Cahill's NPI, 1124071337, was assigned on May 18, 2006. Dr. Cahill graduated from Loyola University of Chicago, Stritch School of Medicine in 1981. Dr. Cahill holds Illinois license 036.066599.
- NPI
- 1124071337NPI Registry (opens in a new tab)
- NPI enumeration date
- May 18, 2006
- NPI status
- Active
- Practice phone
- (630) 527-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John Michael Cahill practices at Edward Hospital in Naperville, Illinois
Dr. Cahill's primary practice is Edward Hospital, at 801 South Washington, Naperville, IL 60540 in Du Page County. The practice phone is (630) 527-3000.
- Edward Hospital801 South Washington, Naperville, IL 60540 · Du Page CountyPhone(630) 527-3000
Source: Dmand AI Affiliation Data
Dr. John Michael Cahill is affiliated with 5 sites of care and 5 medical groups
Dr. Cahill's primary practice is Edward Hospital in Naperville, Illinois, part of Endeavor Health. The medical group on file is Edward Hospital. Dmand AI also links Dr. Cahill to 4 more group practices and clinics and 4 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Michael Cahill's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cahill practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Edward Hospital | Available with a free account |
| +4 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Michael Cahill is one of 286 interventional cardiologists in Illinois
Interventional cardiology is Dr. Cahill's primary specialty in the NPI Registry, under taxonomy code 207RI0011X. Dr. Cahill is licensed in Illinois.
Specialties and state licenses
- Interventional cardiology, IllinoisPrimary
Interventional cardiologists near Dr. Cahill
Counts of interventional cardiologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Michael Cahill billed Medicare for 5,471 services in 2024
CMS data shows 5,471 Medicare services from Dr. Cahill across 20 procedure codes in 2024, for 1,477 Medicare patients. Medicare paid $310,258 for them.
Dr. Cahill's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2,2632024: 2,267No change
- Other services
- 2023: 322024: 1,4084300%
- Tests and treatments
- 2023: 1,0702024: 1,19612%
- Drugs given in the office
- 2023: 3762024: 60060%
- Imaging
- 2023: 242024: 0100%
Where Dr. Cahill's Medicare services took place, 2024
- In an office4,46182%
- In a facility1,01018%
Dr. Cahill compared with the Illinois median for interventional cardiologists, 2024
- Dr. Cahill
- Illinois median
- Medicare services
- 5,471vs 2,2642.4 times
- Medicare patients
- 1,477vs 96952% above
- Part D claims
- 7,523vs 2,4133.1 times
Medians across 282 interventional cardiologists in Illinois with Dmand AI profiles that report each measure.
Dr. Cahill'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Michael Cahill treated 1,477 Medicare patients in 2024, average age 78
CMS counts 1,477 Medicare patients who saw Dr. Cahill in 2024. The largest group is 75 to 84, with 585 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 9% are also on Medicaid. Their average risk score is 1.59, 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. Cahill's median patient age at 72, with 34% women.
Dr. Cahill's Medicare patients by age, 2024
Dr. Cahill's Medicare patients by sex, 2024
- Women69947%
- Men77853%
Chronic conditions among Dr. Cahill's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease64%
- Arthritis55%
- Heart failure39%
- Atrial fibrillation38%
- Diabetes38%
- Chronic kidney disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Cahill's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women34%
- Men66%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Michael Cahill wrote 7,790 Medicare Part D claims in 2024
In 2024, Dr. Cahill wrote 7,790 Medicare Part D claims for 947 patients. 85% of them were for generic drugs. CMS names the drug for 7,523 of them, across 56 drugs with 11 or more claims each, at $1,214,744 in total drug cost. In 2023, CMS named 6,526 claims across 49 drugs.
Dr. Cahill's Part D claims by kind of drug, 2024
- Generic6,594 claims85%
- Brand-name1,196 claims15%
Dr. Cahill'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: 6,5262024: 7,52315%
Drugs named by CMS: 56 in 2024, 49 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
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Dr. John Michael Cahill received $6,649 in industry payments from 2016 to 2025
CMS Open Payments shows 338 general payments to Dr. Cahill from 31 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Janssen Pharmaceuticals, Inc paid the most, $2,199.
General payments to Dr. Cahill by program year, 2016 to 2025
General payments to Dr. Cahill by kind, 2016 to 2025
- Food and beverage$6,61299%
- Education$381%
Companies that paid Dr. Cahill 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. John Michael Cahill graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Cahill graduated from Loyola University of Chicago, Stritch School of Medicine in 1981.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Michael Cahill'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. John Michael Cahill
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. John Michael Cahill's NPI number?
Dr. John Michael Cahill's NPI number is 1124071337. It was assigned on May 18, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Michael Cahill?
Dr. John Michael Cahill is an interventional cardiologist in Naperville, Illinois. The primary specialty in the NPI Registry is Interventional Cardiology Physician (taxonomy code 207RI0011X).
Where does Dr. John Michael Cahill practice?
Dr. Cahill practices at 801 South Washington, Naperville, IL 60540. Dr. Cahill's primary practice is Edward Hospital in Naperville, Illinois, part of Endeavor Health. Dmand AI also links Dr. Cahill to 4 group practices and clinics and 4 medical groups.
What is Dr. John Michael Cahill's office phone number?
The practice phone on file for Dr. Cahill is (630) 527-3000.
What is Dr. John Michael Cahill's medical license number?
Dr. Cahill holds Illinois license 036.066599.
Which hospitals is Dr. John Michael Cahill affiliated with?
Dr. Cahill practices at Edward Hospital in Naperville, Illinois.
What medical group is Dr. John Michael Cahill part of?
Dr. Cahill is linked to Edward Hospital. Dmand AI links Dr. Cahill to 4 more medical groups.
Does Dr. John Michael Cahill accept Medicare?
Yes. CMS data shows Dr. Cahill billed Medicare for 5,471 services in 2024.
How many Medicare patients does Dr. John Michael Cahill see?
CMS counts 1,477 Medicare patients who saw Dr. Cahill in 2024, with an average age of 78.
What services does Dr. John Michael Cahill bill to Medicare?
In 2024, Dr. Cahill's most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and injected or infused drug (J2785).
Show 4 more questionsShow fewer questions
Where did Dr. John Michael Cahill go to medical school?
Dr. Cahill graduated from Loyola University of Chicago, Stritch School of Medicine in 1981.
What drugs does Dr. John Michael Cahill prescribe most?
In 2024 Medicare Part D data, Dr. Cahill's most prescribed drugs by claims were Metoprolol Succinate, Atorvastatin Calcium and Rosuvastatin Calcium.
Has Dr. John Michael Cahill received payments from drug or device companies?
CMS Open Payments shows $6,649 in general payments to Dr. Cahill from 31 companies from 2016 to 2025. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. John Michael Cahill been practicing?
Dr. Cahill graduated from medical school in 1981, 45 years ago.
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