Dr. Ronald C. Gregus, MD
- Medicare services, 2023
- 17
- Medicare patients, 2024
- 14
- Part D claims, 2024
- 24
- Medical group
- 1
- State license
- 1
- Practice address
- 13641 S Rt 59, Plainfield, IL 60544
- Practice phone
- Call (815) 713-2738
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Physicians Immediate Care North Chicago
Plainfield, Illinois
Find Dr. Gregus' 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. Ronald C. Gregus is a preventive medicine/occupational environmental medicine physician in Plainfield, Illinois
Dr. Gregus practices at Physicians Immediate Care North Chicago in Plainfield, Illinois.
Dr. Gregus' NPI, 1205953684, was assigned on March 23, 2007. Dr. Gregus holds Illinois license 036-083618.
- NPI
- 1205953684NPI Registry (opens in a new tab)
- NPI enumeration date
- March 23, 2007
- NPI status
- Active
- Practice phone
- (815) 713-2738
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Ronald C. Gregus practices at Physicians Immediate Care North Chicago in Plainfield, Illinois
Dr. Gregus' primary practice is Physicians Immediate Care North Chicago, at 13641 S Rt 59, Plainfield, IL 60544 in Will County. The practice phone is (815) 713-2738.
- Physicians Immediate Care North Chicago13641 S Rt 59, Plainfield, IL 60544 · Will CountyPhone(815) 713-2738
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Ronald C. Gregus is affiliated with 1 site of care and 1 medical group
Dr. Gregus' primary practice is Physicians Immediate Care North Chicago in Plainfield, Illinois. The medical group on file is Physicians Immediate Care.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Ronald C. Gregus' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gregus practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Physicians Immediate Care North Chicago | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ronald C. Gregus is one of 18 preventive medicine/occupational environmental medicine physicians in Illinois
Preventive medicine/occupational environmental medicine is Dr. Gregus' primary specialty in the NPI Registry, under taxonomy code 2083P0500X. Dr. Gregus is licensed in Illinois.
Specialties and state licenses
- Preventive medicine/occupational environmental medicine, IllinoisPrimary
Preventive medicine/occupational environmental medicine physicians near Dr. Gregus
Counts of preventive medicine/occupational environmental medicine physicians 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. Ronald C. Gregus billed Medicare for 17 services in 2023
CMS data shows 17 Medicare services from Dr. Gregus across 1 procedure code in 2023, all of them office visits, for 14 Medicare patients. Medicare paid $1,196 for them. Every service was in an office.
Dr. Gregus' Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 1242023: 1786%
- Lab and pathology
- 2022: 492023: 0100%
- Other services
- 2022: 322023: 0100%
Dr. Gregus' most billed Medicare procedure codes, 2023
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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Source: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data
Dr. Ronald C. Gregus treated 14 Medicare patients in 2024, average age 76
CMS counts 14 Medicare patients who saw Dr. Gregus in 2024. The largest group is under 65, with 0 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gregus' median patient age at 32, with 65% women.
Dr. Gregus' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Gregus' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gregus' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 32
Patient panel by sex, all payers
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ronald C. Gregus wrote 24 Medicare Part D claims in 2024
In 2024, Dr. Gregus wrote 24 Medicare Part D claims for 19 patients. 96% of them were for generic drugs. CMS names the drug for 18 of them, across 1 drug with 11 or more claims each, at $35 in total drug cost. In 2022, CMS named 69 claims across 4 drugs.
Dr. Gregus' Part D claims by kind of drug, 2024
- Generic23 claims96%
- Brand-name and other1 claims4%
Dr. Gregus' 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.
Drug classes CMS tracks in Dr. Gregus' Part D claims, 2024
- Antibiotics58%14 of 24 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 692023: 1874%
Drugs named by CMS: 1 in 2023, 4 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), 2024 data
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Sources for Dr. Ronald C. Gregus'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) |
| 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) |
| 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. Ronald C. Gregus
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. Ronald C. Gregus' NPI number?
Dr. Ronald C. Gregus' NPI number is 1205953684. It was assigned on March 23, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronald C. Gregus?
Dr. Ronald C. Gregus is a preventive medicine/occupational environmental medicine physician in Plainfield, Illinois. The primary specialty in the NPI Registry is Preventive Medicine/Occupational Environmental Medicine Physician (taxonomy code 2083P0500X).
Where does Dr. Ronald C. Gregus practice?
Dr. Gregus practices at 13641 S Rt 59, Plainfield, IL 60544. Dr. Gregus' primary practice is Physicians Immediate Care North Chicago in Plainfield, Illinois.
What is Dr. Ronald C. Gregus' office phone number?
The practice phone on file for Dr. Gregus is (815) 713-2738.
What is Dr. Ronald C. Gregus' medical license number?
Dr. Gregus holds Illinois license 036-083618.
What medical group is Dr. Ronald C. Gregus part of?
Dr. Gregus is linked to Physicians Immediate Care.
Does Dr. Ronald C. Gregus accept Medicare?
Yes. CMS data shows Dr. Gregus billed Medicare for 17 services in 2023.
How many Medicare patients does Dr. Ronald C. Gregus see?
CMS counts 14 Medicare patients who saw Dr. Gregus in 2024, with an average age of 76.
What services does Dr. Ronald C. Gregus bill to Medicare?
In 2023, Dr. Gregus' most billed Medicare services were office visit, established patient (99213).
What drugs does Dr. Ronald C. Gregus prescribe most?
In 2023 Medicare Part D data, Dr. Gregus' most prescribed drugs by claims were Prednisone.
How long has Dr. Ronald C. Gregus been practicing?
Dr. Gregus graduated from medical school in 1984, 42 years ago.
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