Dr. Gerald A. Cahill, MD
- Medicare services, 2024
- 76
- Medicare patients, 2026
- 76
- Part D claims, 2026
- 28
- Hospital affiliations
- 4
- Industry payments
- $14,978
- Practice address
- 20201 Crawford Ave, Olympia Fields, IL 60461
- Practice phone
- Call (708) 852-2953
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Prime Healthcare Olympia Fields
Olympia Fields, Illinois
Find Dr. Cahill'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. Gerald A. Cahill is a general surgeon in Olympia Fields, Illinois
Dr. Cahill practices at Prime Healthcare Olympia Fields in Olympia Fields, Illinois.
Dr. Cahill's NPI, 1346357795, was assigned on August 23, 2006. Dr. Cahill graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1982. Dr. Cahill holds Illinois license 036068765.
- NPI
- 1346357795NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911951272
- NPI enumeration date
- August 23, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (708) 852-2953
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gerald A. Cahill practices at Prime Healthcare Olympia Fields in Olympia Fields, Illinois
Dr. Cahill's primary practice is Prime Healthcare Olympia Fields, at 20201 Crawford Ave, Olympia Fields, IL 60461 in Cook County. The practice phone is (708) 852-2953.
- Prime Healthcare Olympia Fields20201 Crawford Ave, Olympia Fields, IL 60461 · Cook CountyPhone(708) 852-2953
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gerald A. Cahill is affiliated with 8 sites of care and 2 medical groups
Dr. Cahill's primary practice is Prime Healthcare Olympia Fields in Olympia Fields, Illinois. Dr. Cahill is also affiliated with Olympia Fields Hospital. The medical group on file is Franciscan Physician Network. Dmand AI also links Dr. Cahill to 3 more hospitals, 2 group practices and clinics, 1 physician office and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gerald A. Cahill's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Cahill practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Prime Healthcare Olympia Fields | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gerald A. Cahill is one of 1,217 general surgeons in Illinois
Surgery is Dr. Cahill's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Cahill's licenses on file in 2 states: Illinois and Indiana.
Specialties and state licenses
- Surgery, IllinoisPrimary
- Indiana license
General surgeons near Dr. Cahill
Counts of general surgeons 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. Gerald A. Cahill billed Medicare for 76 services in 2024
CMS data shows 76 Medicare services from Dr. Cahill across 3 procedure codes in 2024, for 76 Medicare patients. Medicare paid $2,955 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Cahill's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 882024: 7614%
Dr. Cahill compared with the Illinois median for general surgeons, 2024
- Dr. Cahill
- Illinois median
- Medicare services
- 76vs 19461% below
- Medicare patients
- 76vs 14447% below
- Part D claims
- 13vs 2854% below
Medians across 1,031 general surgeons 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Cahill and other general surgeons in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gerald A. Cahill treated 76 Medicare patients in 2026, average age 67
CMS counts 76 Medicare patients who saw Dr. Cahill in 2026. The largest group is 65 to 74, with 27 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 38% are also on Medicaid. Their average risk score is 2.38, 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 56, with 76% women.
Dr. Cahill's Medicare patients by age, 2026
CMS leaves out age groups with fewer than 11 patients.
Dr. Cahill's Medicare patients by sex, 2026
- Women4863%
- Men2837%
Chronic conditions among Dr. Cahill's Medicare patients, 2026
- High blood pressure75%
- High cholesterol74%
- Arthritis59%
- Mood disorders53%
- Anxiety51%
- Depression50%
- Diabetes49%
- COPD41%
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 56
Patient panel by sex, all payers
- Women76%
- Men22%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2026 data
Dr. Gerald A. Cahill wrote 28 Medicare Part D claims in 2026
In 2026, Dr. Cahill wrote 28 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $2,793 in total drug cost. In 2022, CMS named 13 claims across 1 drug.
Dr. Cahill's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 132023: 13No change
Drugs named by CMS: 1 in 2023, 1 in 2022.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2026 data
Dr. Gerald A. Cahill ranks in the 45th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Cahill accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 14 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Cahill, more than 45% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Cahill ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 45th percentile14 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair - groin (open): 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gerald A. Cahill received $14,978 in industry payments from 2016 to 2025
CMS Open Payments shows 45 general payments to Dr. Cahill from 9 drug and device companies from 2016 to 2025. Education make up the largest share, 82% of the total. Intuitive Surgical, Inc. paid the most, $13,805.
General payments to Dr. Cahill by program year, 2016 to 2025
General payments to Dr. Cahill by kind, 2016 to 2025
- Education$12,35182%
- Food and beverage$1,45010%
- Travel and lodging$1,1778%
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. Gerald A. Cahill graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Cahill graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1982.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gerald A. 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 | 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 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)Doctors and Clinicians Utilization Data (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. Gerald A. 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. Gerald A. Cahill's NPI number?
Dr. Gerald A. Cahill's NPI number is 1346357795. It was assigned on August 23, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gerald A. Cahill?
Dr. Gerald A. Cahill is a general surgeon in Olympia Fields, Illinois. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Gerald A. Cahill practice?
Dr. Cahill practices at 20201 Crawford Ave, Olympia Fields, IL 60461. Dr. Cahill's primary practice is Prime Healthcare Olympia Fields in Olympia Fields, Illinois. Dmand AI also links Dr. Cahill to 3 hospitals, 2 group practices and clinics, 1 physician office and 1 medical group, and a free account names each one.
What is Dr. Gerald A. Cahill's office phone number?
The practice phone on file for Dr. Cahill is (708) 852-2953. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Dr. Gerald A. Cahill's email address?
Dmand AI checks professional and personal email addresses for Dr. Cahill through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. Gerald A. Cahill's medical license number?
Dr. Cahill holds Illinois license 036068765, one of the licenses on file in 2 states.
Which states has Dr. Gerald A. Cahill been licensed in?
Dmand AI has state licenses on file for Dr. Cahill in Illinois and Indiana.
Which hospitals is Dr. Gerald A. Cahill affiliated with?
Dr. Cahill is affiliated with Olympia Fields Hospital. Dmand AI links Dr. Cahill to 3 more hospitals, named with a free account.
What medical group is Dr. Gerald A. Cahill part of?
Dr. Cahill is linked to Franciscan Physician Network. Dmand AI links Dr. Cahill to 1 more medical group, named with a free account.
Who does Dr. Gerald A. Cahill practice with?
Dmand AI links 1,275 HCPs to Dr. Cahill's primary medical group, 24 of them general surgeons. A free account lists them, with verified contacts.
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Does Dr. Gerald A. Cahill accept Medicare?
Yes. CMS data shows Dr. Cahill billed Medicare for 76 services in 2024, and Dr. Cahill accepts Medicare assignment.
How many Medicare patients does Dr. Gerald A. Cahill see?
CMS counts 76 Medicare patients who saw Dr. Cahill in 2026, with an average age of 67.
What services does Dr. Gerald A. Cahill bill to Medicare?
In 2024, Dr. Cahill's most billed Medicare services were hospital inpatient care (99231), office visit, established patient (99213) and hospital inpatient care (99221).
Where did Dr. Gerald A. Cahill go to medical school?
Dr. Cahill graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1982.
What drugs does Dr. Gerald A. Cahill prescribe most?
In 2023 Medicare Part D data, Dr. Cahill's most prescribed drugs by claims were Sucralfate.
Has Dr. Gerald A. Cahill received payments from drug or device companies?
CMS Open Payments shows $14,978 in general payments to Dr. Cahill from 9 companies from 2016 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Gerald A. Cahill been practicing?
Dr. Cahill graduated from medical school in 1982, 44 years ago.
What EHR does Dr. Gerald A. Cahill's practice use?
Dmand AI tracks the EHR system at Prime Healthcare Olympia Fields and at 7 more sites and 1 medical group. The vendor and product are available with a free Dmand AI account.
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