Dr. Robert D. Zimmerman, MD
- Medicare services, 2024
- 195
- Medicare patients, 2024
- 46
- Part D claims, 2024
- 140
- Industry payments
- $908
- Affiliated sites
- 2
- Practice address
- 120 S Lagrange Rd, Lagrange, IL 60525
- Practice phone
- Call (708) 352-6666
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
United Therapies
Lagrange, Illinois
Find Dr. Zimmerman's professional email, personal email and mobile number
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Dr. Robert D. Zimmerman is a urologist in Lagrange, Illinois
Dr. Zimmerman practices at United Therapies in Lagrange, Illinois.
Dr. Zimmerman's NPI, 1043355530, was assigned on February 21, 2007. Dr. Zimmerman holds Illinois license 036054963.
- NPI
- 1043355530NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800980343
- NPI enumeration date
- February 21, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (708) 352-6666
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 76
- Medical school graduation
- 1976
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Robert D. Zimmerman practices at United Therapies in Lagrange, Illinois
Dr. Zimmerman's primary practice is United Therapies, at 120 S Lagrange Rd, Lagrange, IL 60525 in Cook County. The practice phone is (708) 352-6666.
- United Therapies120 S Lagrange Rd, Lagrange, IL 60525 · Cook CountyPhone(708) 352-6666
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Robert D. Zimmerman is affiliated with 3 sites of care and 1 medical group
Dr. Zimmerman's primary practice is United Therapies in Lagrange, Illinois. The medical group on file is Metro Chicago Surgical Oncology. Dmand AI also links Dr. Zimmerman to 1 more physician office and 1 group practice or clinic, 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. Robert D. Zimmerman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zimmerman practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| United Therapies | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Robert D. Zimmerman is one of 513 urologists in Illinois
Urology is Dr. Zimmerman's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Zimmerman is licensed in Illinois.
Specialties and state licenses
- Urology, IllinoisPrimary
Urologists near Dr. Zimmerman
Counts of urologists 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. Robert D. Zimmerman billed Medicare for 195 services in 2024
CMS data shows 195 Medicare services from Dr. Zimmerman across 6 procedure codes in 2024, for 46 Medicare patients. Medicare paid $7,739 for them. Every service was in an office.
Dr. Zimmerman's Medicare services by type, 2022 to 2024
- 2022
- 2024
- Office and hospital visits
- 2022: 02024: 73
- Surgery
- 2022: 142024: 72414%
- Lab and pathology
- 2022: 02024: 50
Dr. Zimmerman compared with the Illinois median for urologists, 2024
- Dr. Zimmerman
- Illinois median
- Medicare services
- 195vs 1,32385% below
- Medicare patients
- 46vs 49091% below
- Part D claims
- 55vs 35885% below
Medians across 498 urologists in Illinois with Dmand AI profiles that report each measure.
Dr. Zimmerman'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. Zimmerman and other urologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Robert D. Zimmerman treated 46 Medicare patients in 2024, average age 74
CMS counts 46 Medicare patients who saw Dr. Zimmerman in 2024. The largest group is 65 to 74, with 26 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 33% are also on Medicaid. Their average risk score is 1.47, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Zimmerman's median patient age at 72, with 21% women.
Dr. Zimmerman's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Zimmerman's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Arthritis48%
- Ischemic heart disease46%
- Diabetes33%
- Cancer24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Zimmerman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women21%
- Men79%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Robert D. Zimmerman wrote 140 Medicare Part D claims in 2024
In 2024, Dr. Zimmerman wrote 140 Medicare Part D claims for 39 patients. 97% of them were for generic drugs. CMS names the drug for 55 of them, across 3 drugs with 11 or more claims each, at $838 in total drug cost. In 2023, CMS named 13 claims across 1 drug.
Dr. Zimmerman's Part D claims by kind of drug, 2024
- Generic136 claims97%
- Brand-name and other4 claims3%
Dr. Zimmerman'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 132024: 55323%
Drugs named by CMS: 3 in 2024, 1 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
How Dr. Robert D. Zimmerman takes part in Medicare
Dr. Zimmerman accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Robert D. Zimmerman received $908 in industry payments from 2016 to 2024
CMS Open Payments shows 31 general payments to Dr. Zimmerman from 12 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 89% of the total. Abbvie Inc. paid the most, $356.
General payments to Dr. Zimmerman by program year, 2016 to 2024
General payments to Dr. Zimmerman by kind, 2016 to 2024
- Food and beverage$80989%
- Education$9911%
Companies that paid Dr. Zimmerman the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Robert D. Zimmerman'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) |
| Industry payments | Open Payments (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. Robert D. Zimmerman
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. Robert D. Zimmerman's NPI number?
Dr. Robert D. Zimmerman's NPI number is 1043355530. It was assigned on February 21, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Robert D. Zimmerman?
Dr. Robert D. Zimmerman is a urologist in Lagrange, Illinois. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. Robert D. Zimmerman practice?
Dr. Zimmerman practices at 120 S Lagrange Rd, Lagrange, IL 60525. Dr. Zimmerman's primary practice is United Therapies in Lagrange, Illinois. Dmand AI also links Dr. Zimmerman to 1 physician office and 1 group practice or clinic.
What is Dr. Robert D. Zimmerman's office phone number?
The practice phone on file for Dr. Zimmerman is (708) 352-6666.
What is Dr. Robert D. Zimmerman's medical license number?
Dr. Zimmerman holds Illinois license 036054963.
What medical group is Dr. Robert D. Zimmerman part of?
Dr. Zimmerman is linked to Metro Chicago Surgical Oncology.
Does Dr. Robert D. Zimmerman accept Medicare?
Yes. CMS data shows Dr. Zimmerman billed Medicare for 195 services in 2024, and Dr. Zimmerman accepts Medicare assignment.
How many Medicare patients does Dr. Robert D. Zimmerman see?
CMS counts 46 Medicare patients who saw Dr. Zimmerman in 2024, with an average age of 74.
What services does Dr. Robert D. Zimmerman bill to Medicare?
In 2024, Dr. Zimmerman's most billed Medicare services were surgery: urinary system (51798), lab and pathology test (81002) and office visit, established patient (99213).
What drugs does Dr. Robert D. Zimmerman prescribe most?
In 2024 Medicare Part D data, Dr. Zimmerman's most prescribed drugs by claims were Tamsulosin HCl, Butalbital-Acetaminophen-Caffe and Oxybutynin Chloride ER.
Has Dr. Robert D. Zimmerman received payments from drug or device companies?
CMS Open Payments shows $908 in general payments to Dr. Zimmerman from 12 companies from 2016 to 2024. The largest total came from Abbvie Inc.
How long has Dr. Robert D. Zimmerman been practicing?
Dr. Zimmerman graduated from medical school in 1976, 50 years ago.
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