Dr. William R. Zimmer, MD
- Medicare services, 2017
- 13
- Industry payments
- $254
- Affiliated sites
- 1
- State license
- 1
- Year NPI issued
- 2006
- Practice address
- 301 N 8th St, Springfield, IL 62701-1041
- Practice phone
- Call (217) 535-3799
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
William Zimmer M.D.
Physician office · Springfield, Illinois
Find Dr. Zimmer's 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. William R. Zimmer is a hematologist and oncologist in Springfield, Illinois
Dr. Zimmer practices at William Zimmer M.D. in Springfield, Illinois.
Dr. Zimmer's NPI, 1275575821, was assigned on June 11, 2006.
- NPI
- 1275575821NPI Registry (opens in a new tab)
- NPI enumeration date
- June 11, 2006
- NPI status
- Active
- Practice phone
- (217) 535-3799
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William R. Zimmer practices at William Zimmer M.D. in Springfield, Illinois
Dr. Zimmer's primary practice is William Zimmer M.D., at 301 N 8th St, Springfield, IL 62701-1041. The practice phone is (217) 535-3799.
- William Zimmer M.D.301 N 8th St, Springfield, IL 62701-1041Phone(217) 535-3799
Source: Dmand AI Affiliation Data
Dr. William R. Zimmer is affiliated with 1 site of care
Dr. Zimmer's primary practice is William Zimmer M.D. in Springfield, Illinois.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William R. Zimmer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zimmer practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| William Zimmer M.D. | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William R. Zimmer is one of 563 hematologists and oncologists in Illinois
Hematology and oncology is Dr. Zimmer's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Zimmer has a license on file in Illinois.
Specialties and state licenses
- Hematology and oncology, Illinois
Hematologists and oncologists near Dr. Zimmer
Counts of hematologists and oncologists 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. William R. Zimmer billed Medicare for 13 services in 2017
CMS data shows 13 Medicare services from Dr. Zimmer across 1 procedure code in 2017. Medicare paid $38 for them. Every service was in an office.
Dr. Zimmer's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Surgery
- 2016: 202017: 1335%
- Drugs given in the office
- 2016: 4022017: 0100%
- Tests and treatments
- 2016: 722017: 0100%
- Office and hospital visits
- 2016: 472017: 0100%
Dr. Zimmer compared with the Illinois median for hematologists and oncologists, 2017
- Dr. Zimmer
- Illinois median
- Medicare services
- 13vs 1,05699% below
Medians across 547 hematologists and oncologists in Illinois with Dmand AI profiles that report each measure.
Dr. Zimmer's most billed Medicare procedure codes, 2017
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 hematologists and oncologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
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Dr. William R. Zimmer received $254 in industry payments from 2016 to 2017
CMS Open Payments shows 11 general payments to Dr. Zimmer from 4 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $131.
General payments to Dr. Zimmer by program year, 2016 to 2017
Companies that paid Dr. Zimmer the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William R. 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 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 |
| 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. William R. 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. William R. Zimmer's NPI number?
Dr. William R. Zimmer's NPI number is 1275575821. It was assigned on June 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William R. Zimmer?
Dr. William R. Zimmer is a hematologist and oncologist in Springfield, Illinois. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. William R. Zimmer practice?
Dr. Zimmer practices at 301 N 8th St, Springfield, IL 62701-1041. Dr. Zimmer's primary practice is William Zimmer M.D. in Springfield, Illinois.
What is Dr. William R. Zimmer's office phone number?
The practice phone on file for Dr. Zimmer is (217) 535-3799.
Does Dr. William R. Zimmer accept Medicare?
Yes. CMS data shows Dr. Zimmer billed Medicare for 13 services in 2017.
What services does Dr. William R. Zimmer bill to Medicare?
In 2017, Dr. Zimmer's most billed Medicare services were surgery: heart and blood vessels (36415).
Has Dr. William R. Zimmer received payments from drug or device companies?
CMS Open Payments shows $254 in general payments to Dr. Zimmer from 4 companies from 2016 to 2017. The largest total came from Pfizer Inc.
How long has Dr. William R. Zimmer been practicing?
Dr. Zimmer's NPI was assigned in 2006.
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