Dr. Gregory P. Witkowski, MD
- Medicare services, 2024
- 1,223
- Medicare patients, 2024
- 377
- Part D claims, 2024
- 189
- MIPS score, 2024
- 96
- Hospital affiliations
- 3
- Practice address
- 25 North Winfield Road, Winfield, IL 60190
- Practice phone
- Call (630) 682-1600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Witkowski's professional email, personal email and mobile number
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Dr. Gregory P. Witkowski is an orthopedic surgeon in Winfield, Illinois
Dr. Witkowski practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare.
Dr. Witkowski's NPI, 1750598850, was assigned on May 17, 2007. Dr. Witkowski graduated from Wayne State University School of Medicine in 2003. Dr. Witkowski holds Illinois license 036123834.
- NPI
- 1750598850NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1052485133
- NPI enumeration date
- May 17, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (630) 682-1600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory P. Witkowski practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois
Dr. Witkowski's primary practice is Northwestern Medicine Central DuPage Hospital, at 25 North Winfield Road, Winfield, IL 60190 in Du Page County. The practice phone is (630) 682-1600.
- Northwestern Medicine Central DuPage Hospital25 North Winfield Road, Winfield, IL 60190 · Du Page CountyPhone(630) 682-1600
Source: Dmand AI Affiliation Data
Dr. Gregory P. Witkowski is affiliated with 7 sites of care and 2 medical groups
Dr. Witkowski's primary practice is Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare. Dr. Witkowski is also affiliated with Northwestern Medicine Delnor Hospital. The medical group on file is Northwestern Medicine Regional Medical Group. Dmand AI also links Dr. Witkowski to 1 more hospital, 2 group practices and clinics, 1 breast imaging center, 1 clinical lab and 1 medical group, 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. Gregory P. Witkowski's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Witkowski practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medicine Central DuPage Hospital | Available with a free account |
| +6 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Gregory P. Witkowski is one of 849 orthopedic surgeons in Illinois
Orthopaedic surgery is Dr. Witkowski's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Witkowski is licensed in Illinois.
Specialties and state licenses
- Orthopaedic surgery, IllinoisPrimary
Orthopedic surgeons near Dr. Witkowski
Counts of orthopedic 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. Gregory P. Witkowski billed Medicare for 1,223 services in 2024
CMS data shows 1,223 Medicare services from Dr. Witkowski across 16 procedure codes in 2024, for 377 Medicare patients. Medicare paid $67,866 for them.
Dr. Witkowski's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4672024: 59527%
- Imaging
- 2023: 4282024: 58938%
- Drugs given in the office
- 2023: 362024: 398%
- Surgery
- 2023: 382024: 0100%
Where Dr. Witkowski's Medicare services took place, 2024
- In an office1,15895%
- In a facility655%
Dr. Witkowski compared with the Illinois median for orthopedic surgeons, 2024
- Dr. Witkowski
- Illinois median
- Medicare services
- 1,223vs 1,250Close to median
- Medicare patients
- 377vs 29627% above
- Part D claims
- 127vs 1206% above
Medians across 741 orthopedic surgeons in Illinois with Dmand AI profiles that report each measure.
Dr. Witkowski'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. Gregory P. Witkowski treated 377 Medicare patients in 2024, average age 76
CMS counts 377 Medicare patients who saw Dr. Witkowski in 2024. The largest group is 65 to 74, with 144 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.72, 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. Witkowski's median patient age at 63, with 63% women.
Dr. Witkowski's Medicare patients by age, 2024
Dr. Witkowski's Medicare patients by sex, 2024
- Women25568%
- Men12232%
Chronic conditions among Dr. Witkowski's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Mood disorders42%
- Anxiety38%
- Depression37%
- Ischemic heart disease31%
- Osteoporosis31%
Share of Medicare patients with each condition. A patient can have several.
Dr. Witkowski's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women63%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory P. Witkowski wrote 189 Medicare Part D claims in 2024
In 2024, Dr. Witkowski wrote 189 Medicare Part D claims for 82 patients. 98% of them were for generic drugs. CMS names the drug for 127 of them, across 5 drugs with 11 or more claims each, at $889 in total drug cost. In 2023, CMS named 133 claims across 5 drugs.
Dr. Witkowski's Part D claims by kind of drug, 2024
- Generic185 claims98%
- Brand-name and other4 claims2%
Dr. Witkowski'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. Witkowski's Part D claims, 2024
- Opioids35%66 of 189 claims
- Antibiotics14%27 of 189 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: 1332024: 1275%
Drugs named by CMS: 5 in 2024, 5 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
Dr. Gregory P. Witkowski scored 96 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Witkowski for performance year 2024, reported through an alternative payment model (APM). Dr. Witkowski accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Witkowski's MIPS scores, performance year 2024
- 96of 100Final score
- 88.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Hip replacement: 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); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gregory P. Witkowski received $781,776 in industry payments from 2016 to 2025
CMS Open Payments shows 172 general payments to Dr. Witkowski from 27 drug and device companies from 2016 to 2025. Acquisitions make up the largest share, 93% of the total. DePuy Synthes Sales Inc. paid the most, $482,066.
General payments to Dr. Witkowski by program year, 2016 to 2025
General payments to Dr. Witkowski by kind, 2016 to 2025
- Acquisitions$727,49493%
- Consulting fees$22,8023%
- Speaker and faculty fees$13,8132%
- Food and beverage$9,9181%
- Other$7,7491%
Companies that paid Dr. Witkowski 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. Gregory P. Witkowski graduated from Wayne State University School of Medicine
Dr. Witkowski graduated from Wayne State University School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory P. Witkowski'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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. Gregory P. Witkowski
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What is Dr. Gregory P. Witkowski's NPI number?
Dr. Gregory P. Witkowski's NPI number is 1750598850. It was assigned on May 17, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory P. Witkowski?
Dr. Gregory P. Witkowski is an orthopedic surgeon in Winfield, Illinois. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Gregory P. Witkowski practice?
Dr. Witkowski practices at 25 North Winfield Road, Winfield, IL 60190. Dr. Witkowski's primary practice is Northwestern Medicine Central DuPage Hospital in Winfield, Illinois, part of Northwestern Memorial HealthCare. Dmand AI also links Dr. Witkowski to 1 hospital, 2 group practices and clinics, 1 breast imaging center, 1 clinical lab and 1 medical group.
What is Dr. Gregory P. Witkowski's office phone number?
The practice phone on file for Dr. Witkowski is (630) 682-1600.
What is Dr. Gregory P. Witkowski's medical license number?
Dr. Witkowski holds Illinois license 036123834.
Which hospitals is Dr. Gregory P. Witkowski affiliated with?
Dr. Witkowski practices at Northwestern Medicine Central DuPage Hospital in Winfield, Illinois. Dr. Witkowski is also affiliated with Northwestern Medicine Delnor Hospital. Dmand AI links Dr. Witkowski to 1 more hospital.
What medical group is Dr. Gregory P. Witkowski part of?
Dr. Witkowski is linked to Northwestern Medicine Regional Medical Group. Dmand AI links Dr. Witkowski to 1 more medical group.
Does Dr. Gregory P. Witkowski accept Medicare?
Yes. CMS data shows Dr. Witkowski billed Medicare for 1,223 services in 2024, and Dr. Witkowski accepts Medicare assignment.
What is Dr. Gregory P. Witkowski's MIPS score?
Dr. Witkowski's MIPS final score for performance year 2024 is 96 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Gregory P. Witkowski see?
CMS counts 377 Medicare patients who saw Dr. Witkowski in 2024, with an average age of 76.
Show 5 more questionsShow fewer questions
What services does Dr. Gregory P. Witkowski bill to Medicare?
In 2024, Dr. Witkowski's most billed Medicare services were office visit, established patient (99213), diagnostic imaging (73610) and office visit, established patient (99214).
Where did Dr. Gregory P. Witkowski go to medical school?
Dr. Witkowski graduated from Wayne State University School of Medicine in 2003.
What drugs does Dr. Gregory P. Witkowski prescribe most?
In 2024 Medicare Part D data, Dr. Witkowski's most prescribed drugs by claims were Hydrocodone-Acetaminophen, Gabapentin and Ondansetron HCl.
Has Dr. Gregory P. Witkowski received payments from drug or device companies?
CMS Open Payments shows $781,776 in general payments to Dr. Witkowski from 27 companies from 2016 to 2025. The largest total came from DePuy Synthes Sales Inc.
How long has Dr. Gregory P. Witkowski been practicing?
Dr. Witkowski graduated from medical school in 2003, 23 years ago.
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