Dr. Westley D. Zimmer, MD
- Medicare services, 2024
- 4,762
- Medicare patients, 2024
- 2,776
- MIPS score, 2024
- 75
- Hospital affiliations
- 5
- Industry payments
- $676
- Practice address
- 1555 N Barrington Rd, Hoffman Estates, IL 60169
- Practice phone
- Call (847) 843-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zimmer's professional email, personal email and mobile number
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Dr. Westley D. Zimmer is an interventional radiologist in Hoffman Estates, Illinois
Dr. Zimmer practices at Ascension Saint Alexius in Hoffman Estates, Illinois, part of Ascension Health Alliance.
Dr. Zimmer's NPI, 1023465150, was assigned on May 18, 2016. Dr. Zimmer graduated from R Franklin University of Med & Sci/Chicago Medical School in 2016. Dr. Zimmer holds Illinois license 036.150117.
- NPI
- 1023465150NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305131285
- NPI enumeration date
- May 18, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (847) 843-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Westley D. Zimmer practices at Ascension Saint Alexius in Hoffman Estates, Illinois
Dr. Zimmer's primary practice is Ascension Saint Alexius, at 1555 N Barrington Rd, Hoffman Estates, IL 60169 in Cook County. The practice phone is (847) 843-2000.
- Ascension Saint Alexius1555 N Barrington Rd, Hoffman Estates, IL 60169 · Cook CountyPhone(847) 843-2000
Source: Dmand AI Affiliation Data
Dr. Westley D. Zimmer is affiliated with 6 sites of care and 5 medical groups
Dr. Zimmer's primary practice is Ascension Saint Alexius in Hoffman Estates, Illinois, part of Ascension Health Alliance. Dr. Zimmer is also affiliated with Northwestern Medicine Central DuPage Hospital. The medical group on file is Endeavor Health Medical Group. Dmand AI also links Dr. Zimmer to 3 more hospitals, 4 medical groups and 1 breast imaging center, 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. Westley D. Zimmer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zimmer practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ascension Saint Alexius | Available with a free account |
| +5 more sites and 4 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Ascension Health Alliance and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Westley D. Zimmer is one of 187 interventional radiologists in Illinois
Vascular and interventional radiology is Dr. Zimmer's primary specialty in the NPI Registry, under taxonomy code 2085R0204X. Dr. Zimmer is licensed in Illinois.
Specialties and state licenses
- Vascular and interventional radiology, IllinoisPrimary
Interventional radiologists near Dr. Zimmer
Counts of interventional radiologists 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. Westley D. Zimmer billed Medicare for 4,762 services in 2024
CMS data shows 4,762 Medicare services from Dr. Zimmer across 71 procedure codes in 2024, for 2,776 Medicare patients. Medicare paid $121,628 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Zimmer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Imaging
- 2023: 3,4942024: 4,22121%
- Tests and treatments
- 2023: 3692024: 3583%
- Surgery
- 2023: 2202024: 18317%
Dr. Zimmer compared with the Illinois median for interventional radiologists, 2024
- Dr. Zimmer
- Illinois median
- Medicare services
- 4,762vs 9205.2 times
- Medicare patients
- 2,776vs 5385.2 times
Medians across 164 interventional radiologists in Illinois with Dmand AI profiles that report each measure.
Dr. Zimmer'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. Zimmer and other interventional radiologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Westley D. Zimmer treated 2,776 Medicare patients in 2024, average age 77
CMS counts 2,776 Medicare patients who saw Dr. Zimmer in 2024. The largest group is 75 to 84, with 1,085 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 15% are also on Medicaid. Their average risk score is 1.87, 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. Zimmer's median patient age at 62, with 62% women.
Dr. Zimmer's Medicare patients by age, 2024
Dr. Zimmer's Medicare patients by sex, 2024
- Women1,65360%
- Men1,12340%
Chronic conditions among Dr. Zimmer's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis59%
- Ischemic heart disease48%
- Diabetes40%
- Chronic kidney disease37%
- Heart failure37%
- Anxiety33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zimmer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 62
Patient panel by sex, all payers
- Women62%
- Men37%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Westley D. Zimmer scored 75 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 75 out of 100 for Dr. Zimmer for performance year 2024, reported as part of a group. Dr. Zimmer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
- MIPS final score, 2024
- 75 of 100
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Westley D. Zimmer received $676 in industry payments from 2018 to 2025
CMS Open Payments shows 7 general payments to Dr. Zimmer from 5 drug and device companies from 2018 to 2025. Food and beverage make up the largest share, 52% of the total. Medtronic Vascular, Inc. paid the most, $324.
General payments to Dr. Zimmer by program year, 2018 to 2025
General payments to Dr. Zimmer by kind, 2018 to 2025
- Food and beverage$35252%
- Education$32448%
Companies that paid Dr. Zimmer the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Westley D. Zimmer graduated from R Franklin University of Med & Sci/Chicago Medical School
Dr. Zimmer graduated from R Franklin University of Med & Sci/Chicago Medical School in 2016.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Westley D. Zimmer'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) |
| 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) |
| 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. Westley D. Zimmer
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. Westley D. Zimmer's NPI number?
Dr. Westley D. Zimmer's NPI number is 1023465150. It was assigned on May 18, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Westley D. Zimmer?
Dr. Westley D. Zimmer is an interventional radiologist in Hoffman Estates, Illinois. The primary specialty in the NPI Registry is Vascular & Interventional Radiology Physician (taxonomy code 2085R0204X).
Where does Dr. Westley D. Zimmer practice?
Dr. Zimmer practices at 1555 N Barrington Rd, Hoffman Estates, IL 60169. Dr. Zimmer's primary practice is Ascension Saint Alexius in Hoffman Estates, Illinois, part of Ascension Health Alliance. Dmand AI also links Dr. Zimmer to 3 hospitals, 4 medical groups and 1 breast imaging center.
What is Dr. Westley D. Zimmer's office phone number?
The practice phone on file for Dr. Zimmer is (847) 843-2000.
What is Dr. Westley D. Zimmer's medical license number?
Dr. Zimmer holds Illinois license 036.150117.
Which hospitals is Dr. Westley D. Zimmer affiliated with?
Dr. Zimmer practices at Ascension Saint Alexius in Hoffman Estates, Illinois. Dr. Zimmer is also affiliated with Northwestern Medicine Central DuPage Hospital. Dmand AI links Dr. Zimmer to 3 more hospitals.
What medical group is Dr. Westley D. Zimmer part of?
Dr. Zimmer is linked to Endeavor Health Medical Group. Dmand AI links Dr. Zimmer to 4 more medical groups.
Does Dr. Westley D. Zimmer accept Medicare?
Yes. CMS data shows Dr. Zimmer billed Medicare for 4,762 services in 2024, and Dr. Zimmer accepts Medicare assignment.
What is Dr. Westley D. Zimmer's MIPS score?
Dr. Zimmer's MIPS final score for performance year 2024 is 75 out of 100, reported as part of a group.
How many Medicare patients does Dr. Westley D. Zimmer see?
CMS counts 2,776 Medicare patients who saw Dr. Zimmer in 2024, with an average age of 77.
Show 4 more questionsShow fewer questions
What services does Dr. Westley D. Zimmer bill to Medicare?
In 2024, Dr. Zimmer's most billed Medicare services were diagnostic imaging (71045), diagnostic imaging (71046) and diagnostic imaging (70450).
Where did Dr. Westley D. Zimmer go to medical school?
Dr. Zimmer graduated from R Franklin University of Med & Sci/Chicago Medical School in 2016.
Has Dr. Westley D. Zimmer received payments from drug or device companies?
CMS Open Payments shows $676 in general payments to Dr. Zimmer from 5 companies from 2018 to 2025. The largest total came from Medtronic Vascular, Inc.
How long has Dr. Westley D. Zimmer been practicing?
Dr. Zimmer graduated from medical school in 2016, 10 years ago.
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