Dr. Charles E. Geringer, MD
- Medicare services, 2024
- 554
- Medicare patients, 2024
- 312
- Part D claims, 2024
- 1,623
- Hospital affiliations
- 1
- Industry payments
- $23,702
- Practice address
- 20201 Crawford Ave, Olympia Fields, IL 60461
- Practice phone
- Call (708) 756-1000
- 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. Geringer's professional email, personal email and mobile number
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Dr. Charles E. Geringer is a rheumatologist in Olympia Fields, Illinois
Dr. Geringer practices at Prime Healthcare Olympia Fields in Olympia Fields, Illinois.
Dr. Geringer's NPI, 1235195702, was assigned on April 25, 2006. Dr. Geringer graduated from Feinberg School of Medicine in 1979. Dr. Geringer holds Illinois license 036063321.
- NPI
- 1235195702NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325170897
- NPI enumeration date
- April 25, 2006
- NPI status
- Active
- Practice phone
- (708) 756-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Charles E. Geringer practices at Prime Healthcare Olympia Fields in Olympia Fields, Illinois
Dr. Geringer's primary practice is Prime Healthcare Olympia Fields, at 20201 Crawford Ave, Olympia Fields, IL 60461 in Cook County. The practice phone is (708) 756-1000.
- Prime Healthcare Olympia Fields20201 Crawford Ave, Olympia Fields, IL 60461 · Cook CountyPhone(708) 756-1000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Charles E. Geringer is affiliated with 2 sites of care and 1 medical group
Dr. Geringer's primary practice is Prime Healthcare Olympia Fields in Olympia Fields, Illinois. Dr. Geringer is also affiliated with Olympia Fields Hospital. The medical group on file is Specialty Physicians of Illinois.
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. Charles E. Geringer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Geringer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Prime Healthcare Olympia Fields | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Charles E. Geringer is one of 285 rheumatologists in Illinois
Rheumatology is Dr. Geringer's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Geringer is board certified in internal medicine by the American Board of Internal Medicine. Dr. Geringer is licensed in Illinois.
Specialties and state licenses
- Rheumatology, IllinoisPrimary
Clinical focus
Dmand AI lists arteritis, arthritis, fibromyalgia and chronic pain, fluid in a joint, gout, joint arthropathy, joint pain and lupus among the conditions Dr. Geringer treats.
Rheumatologists near Dr. Geringer
Counts of rheumatologists 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. Charles E. Geringer billed Medicare for 554 services in 2024
CMS data shows 554 Medicare services from Dr. Geringer across 8 procedure codes in 2024, for 312 Medicare patients. Medicare paid $32,787 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Geringer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8082024: 50937%
- Surgery
- 2023: 542024: 4517%
- Drugs given in the office
- 2023: 582024: 0100%
- Tests and treatments
- 2023: 342024: 0100%
Dr. Geringer compared with the Illinois median for rheumatologists, 2024
- Dr. Geringer
- Illinois median
- Medicare services
- 554vs 98744% below
- Medicare patients
- 312vs 26219% above
- Part D claims
- 1,470vs 1,07736% above
Medians across 290 rheumatologists in Illinois with Dmand AI profiles that report each measure.
Dr. Geringer'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. Geringer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Geringer and other rheumatologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Charles E. Geringer treated 312 Medicare patients in 2024, average age 73
CMS counts 312 Medicare patients who saw Dr. Geringer in 2024. The largest group is 65 to 74, with 130 patients. 75% of them have arthritis, and 75% have high blood pressure. 20% are also on Medicaid. Their average risk score is 1.69, 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. Geringer's median patient age at 70, with 82% women.
Dr. Geringer's Medicare patients by age, 2024
Dr. Geringer's Medicare patients by sex, 2024
- Women24177%
- Men7123%
Chronic conditions among Dr. Geringer's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Diabetes37%
- Chronic kidney disease32%
- Ischemic heart disease32%
- Mood disorders27%
- Osteoporosis25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Geringer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women82%
- Men18%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Charles E. Geringer wrote 1,623 Medicare Part D claims in 2024
In 2024, Dr. Geringer wrote 1,623 Medicare Part D claims for 435 patients. 91% of them were for generic drugs. CMS names the drug for 1,470 of them, across 27 drugs with 11 or more claims each, at $393,316 in total drug cost. In 2023, CMS named 1,667 claims across 30 drugs.
Dr. Geringer's Part D claims by kind of drug, 2024
- Generic1,474 claims91%
- Brand-name149 claims9%
Dr. Geringer'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. Geringer's Part D claims, 2024
- Opioids4%67 of 1,623 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: 1,6672024: 1,47012%
Drugs named by CMS: 27 in 2024, 30 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. Charles E. Geringer received $23,702 in industry payments from 2016 to 2025
CMS Open Payments shows 991 general payments to Dr. Geringer from 40 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Amgen Inc. paid the most, $4,009.
General payments to Dr. Geringer by program year, 2016 to 2025
General payments to Dr. Geringer by kind, 2016 to 2025
- Food and beverage$23,45499%
- Education$2491%
Companies that paid Dr. Geringer 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. Charles E. Geringer has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Geringer, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Geringer
- 2013
- CMS Stage 1 EHR
- Undated
- ACR Fellow
Source: Dmand AI Professional Profile Data
Dr. Charles E. Geringer graduated from Feinberg School of Medicine
Dr. Geringer graduated from Feinberg School of Medicine in 1979. Dr. Geringer is a member of ACR.
- Medical school
- Board certified in internal medicine
- Board certified in rheumatology
Source: Dmand AI Professional Profile Data
Dr. Charles E. Geringer accepts plans from 11 insurance carriers
Dr. Geringer is in network with 11 carriers, including Aetna, Cigna 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
- Cigna
- Blue Cross Blue Shield of Michigan
- HCSC
- Humana
- Blue Cross Blue Shield of Massachusetts
- Molina
- Regence Health Plans
- +3 more carriersWith a free account
Plan types Dr. Geringer accepts, by number of carriers
- Medicare8
- PPO8
- HMO7
- POS4
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Charles E. Geringer'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) |
| 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. Charles E. Geringer
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. Charles E. Geringer's NPI number?
Dr. Charles E. Geringer's NPI number is 1235195702. It was assigned on April 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Charles E. Geringer?
Dr. Charles E. Geringer is a rheumatologist in Olympia Fields, Illinois. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Charles E. Geringer practice?
Dr. Geringer practices at 20201 Crawford Ave, Olympia Fields, IL 60461. Dr. Geringer's primary practice is Prime Healthcare Olympia Fields in Olympia Fields, Illinois.
What is Dr. Charles E. Geringer's office phone number?
The practice phone on file for Dr. Geringer is (708) 756-1000.
What is Dr. Charles E. Geringer's medical license number?
Dr. Geringer holds Illinois license 036063321.
Which hospitals is Dr. Charles E. Geringer affiliated with?
Dr. Geringer is affiliated with Olympia Fields Hospital.
What medical group is Dr. Charles E. Geringer part of?
Dr. Geringer is linked to Specialty Physicians of Illinois.
Does Dr. Charles E. Geringer accept Medicare?
Yes. CMS data shows Dr. Geringer billed Medicare for 554 services in 2024.
How many Medicare patients does Dr. Charles E. Geringer see?
CMS counts 312 Medicare patients who saw Dr. Geringer in 2024, with an average age of 73.
Is Dr. Charles E. Geringer board certified?
Yes. Dr. Geringer is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Charles E. Geringer bill to Medicare?
In 2024, Dr. Geringer's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, new patient (99204).
Where did Dr. Charles E. Geringer go to medical school?
Dr. Geringer graduated from Feinberg School of Medicine in 1979.
What drugs does Dr. Charles E. Geringer prescribe most?
In 2024 Medicare Part D data, Dr. Geringer's most prescribed drugs by claims were Prednisone, Hydroxychloroquine Sulfate and Methotrexate.
Has Dr. Charles E. Geringer received payments from drug or device companies?
CMS Open Payments shows $23,702 in general payments to Dr. Geringer from 40 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Charles E. Geringer been practicing?
Dr. Geringer graduated from medical school in 1979, 47 years ago.
What insurance does Dr. Charles E. Geringer accept?
Dr. Geringer is in network with 11 carriers, including Aetna, Cigna 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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