Dr. John Robert Vantimmeren, MD
- Medicare services, 2021
- 19
- Medicare patients, 2024
- 87
- Part D claims, 2020
- 48
- Hospital affiliations
- 1
- Industry payments
- $226
- Practice address
- 100 Michigan St NE, Grand Rapids, MI 49503
- Practice phone
- Call (616) 391-1774
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Vantimmeren'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. John Robert Vantimmeren is an anesthesiologist in Grand Rapids, Michigan
Dr. Vantimmeren practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health.
Dr. Vantimmeren's NPI, 1164401758, was assigned on January 11, 2006. Dr. Vantimmeren graduated from University of Michigan Medical School in 1974. Dr. Vantimmeren holds Michigan license 4301035269.
- NPI
- 1164401758NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0749182954
- NPI enumeration date
- January 11, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (616) 391-1774
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 78
- Medical school graduation
- 1974
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Robert Vantimmeren practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan
Dr. Vantimmeren's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth, at 100 Michigan St NE, Grand Rapids, MI 49503 in Kent County. The practice phone is (616) 391-1774.
- Corewell Health Grand Rapids Hospitals - Butterworth100 Michigan St NE, Grand Rapids, MI 49503 · Kent CountyPhone(616) 391-1774
Source: Dmand AI Affiliation Data
Dr. John Robert Vantimmeren is affiliated with 3 sites of care and 2 medical groups
Dr. Vantimmeren's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health. The medical group on file is Corewell Health Medical Group West. Dmand AI also links Dr. Vantimmeren to 2 more group practices and clinics 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. John Robert Vantimmeren's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Vantimmeren practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Corewell Health Grand Rapids Hospitals - Butterworth | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Robert Vantimmeren is one of 1,302 anesthesiologists in Michigan
Anesthesiology is Dr. Vantimmeren's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Vantimmeren is licensed in Michigan.
Specialties and state licenses
- Anesthesiology, MichiganPrimary
Anesthesiologists near Dr. Vantimmeren
Counts of anesthesiologists 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. John Robert Vantimmeren billed Medicare for 19 services in 2021
CMS data shows 19 Medicare services from Dr. Vantimmeren across 1 procedure code in 2021, for 87 Medicare patients. Medicare paid $674 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Vantimmeren's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Surgery
- 2020: 112021: 1973%
Dr. Vantimmeren compared with the Michigan median for anesthesiologists, 2021
- Dr. Vantimmeren
- Michigan median
- Medicare services
- 19vs 8979% below
- Medicare patients
- 87vs 17751% below
- Part D claims
- 48vs 48Close to median
Medians across 1,283 anesthesiologists in Michigan with Dmand AI profiles that report each measure.
Dr. Vantimmeren's most billed Medicare procedure codes, 2021
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. Vantimmeren and other anesthesiologists in Michigan.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Robert Vantimmeren treated 87 Medicare patients in 2024, average age 69
CMS counts 87 Medicare patients who saw Dr. Vantimmeren in 2024. The largest group is 65 to 74, with 40 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 26% are also on Medicaid. Their average risk score is 1.79, 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. Vantimmeren's median patient age at 61, with 52% women.
Dr. Vantimmeren's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Vantimmeren's Medicare patients by sex, 2024
- Women4956%
- Men3844%
Chronic conditions among Dr. Vantimmeren's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Anxiety54%
- Mood disorders49%
- Depression46%
- Diabetes38%
- Ischemic heart disease36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Vantimmeren's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women52%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Robert Vantimmeren wrote 48 Medicare Part D claims in 2020
In 2020, Dr. Vantimmeren wrote 48 Medicare Part D claims. They cover 2 drugs, with $1,841 in total drug cost.
Dr. Vantimmeren's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. John Robert Vantimmeren takes part in Medicare
Dr. Vantimmeren 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. John Robert Vantimmeren received $226 in industry payments from 2016 to 2022
CMS Open Payments shows 12 general payments to Dr. Vantimmeren from 6 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $66.
General payments to Dr. Vantimmeren by program year, 2016 to 2022
Companies that paid Dr. Vantimmeren the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Robert Vantimmeren graduated from University of Michigan Medical School
Dr. Vantimmeren graduated from University of Michigan Medical School in 1974.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Robert Vantimmeren'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) |
| 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) |
| 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. John Robert Vantimmeren
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. John Robert Vantimmeren's NPI number?
Dr. John Robert Vantimmeren's NPI number is 1164401758. It was assigned on January 11, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John Robert Vantimmeren?
Dr. John Robert Vantimmeren is an anesthesiologist in Grand Rapids, Michigan. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. John Robert Vantimmeren practice?
Dr. Vantimmeren practices at 100 Michigan St NE, Grand Rapids, MI 49503. Dr. Vantimmeren's primary practice is Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan, part of Corewell Health. Dmand AI also links Dr. Vantimmeren to 2 group practices and clinics and 1 medical group.
What is Dr. John Robert Vantimmeren's office phone number?
The practice phone on file for Dr. Vantimmeren is (616) 391-1774.
What is Dr. John Robert Vantimmeren's medical license number?
Dr. Vantimmeren holds Michigan license 4301035269.
Which hospitals is Dr. John Robert Vantimmeren affiliated with?
Dr. Vantimmeren practices at Corewell Health Grand Rapids Hospitals - Butterworth in Grand Rapids, Michigan.
What medical group is Dr. John Robert Vantimmeren part of?
Dr. Vantimmeren is linked to Corewell Health Medical Group West. Dmand AI links Dr. Vantimmeren to 1 more medical group.
Does Dr. John Robert Vantimmeren accept Medicare?
Yes. CMS data shows Dr. Vantimmeren billed Medicare for 19 services in 2021, and Dr. Vantimmeren accepts Medicare assignment.
How many Medicare patients does Dr. John Robert Vantimmeren see?
CMS counts 87 Medicare patients who saw Dr. Vantimmeren in 2024, with an average age of 69.
What services does Dr. John Robert Vantimmeren bill to Medicare?
In 2021, Dr. Vantimmeren's most billed Medicare services were surgery: heart and blood vessels (36620).
Show 4 more questionsShow fewer questions
Where did Dr. John Robert Vantimmeren go to medical school?
Dr. Vantimmeren graduated from University of Michigan Medical School in 1974.
What drugs does Dr. John Robert Vantimmeren prescribe most?
In 2020 Medicare Part D data, Dr. Vantimmeren's most prescribed drugs by claims were Ceftriaxone and Sodium Chloride.
Has Dr. John Robert Vantimmeren received payments from drug or device companies?
CMS Open Payments shows $226 in general payments to Dr. Vantimmeren from 6 companies from 2016 to 2022. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. John Robert Vantimmeren been practicing?
Dr. Vantimmeren graduated from medical school in 1974, 52 years ago.
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