DR. JOHN ROBERT VANTIMMEREN MD
NPI 1164401758
Anesthesiology in Grand Rapids, MI
About Dr. John Robert Vantimmeren Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN ROBERT VANTIMMEREN MD (NPI 1164401758) is an individual anesthesiology provider in Grand Rapids, Michigan, licensed in Michigan (4301035269) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Spectrum Health, and is a graduate of University Of Michigan Medical School (1974).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. John Robert Vantimmeren Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show John Vantimmeren reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Grand Rapids, MI 49525
- Reassigned Medicare billing, Michigan enrollment
- 2,446 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spectrum Health
Acute Care Hospitals · Grand Rapids, MIOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRAND RAPIDS, MI 49525
GRAND RAPIDS, MI 49525
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Vantimmeren's NPI number?
The NPI number for John Vantimmeren is 1164401758. It was assigned to this individual provider in the NPPES registry on January 11, 2006.
Where is John Vantimmeren located?
John Vantimmeren practices at 3333 Evergreen Dr NE, Grand Rapids, MI 49525. The listed phone number is (616) 364-4200.
What is John Vantimmeren's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is John Vantimmeren enrolled in Medicare?
Yes. John Vantimmeren is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for John Vantimmeren's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Vantimmeren reassigns Medicare benefits to Spectrum Health Primary Care Partners (Grand Rapids, MI). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Vantimmeren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is John Vantimmeren affiliated with any hospitals?
According to CMS data, John Vantimmeren is affiliated with Spectrum Health.
When was this NPI record last updated?
The NPPES record for John Vantimmeren was last updated on July 3, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. John Robert Vantimmeren, MD · NPI 1164401758
Anesthesiology physician in Grand Rapids, Michigan. Individual provider, active in the CMS NPPES registry since January 11, 2006.
## Identity
- **NPI:** 1164401758 (Entity type: Individual)
- **Enumerated:** January 11, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 4301035269 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 3333 EVERGREEN DR NE, Grand Rapids, MI 49525-9756
- **Phone:** (616) 364-4200 · **Fax:** (616) 364-7347
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Spectrum Health Primary Care Partners (NPI 1346480258, Grand Rapids, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Michigan Medical School, class of 1974
## Record status
- **NPPES last updated:** July 3, 2014
- **Other identifiers:** Medicare ID-Type Unspecified OM71590008; Medicare UPIN A76949; Medicaid 1847186 (MI)
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Source: [NPI Profile](https://npiprofile.com/npi/1164401758) · Data from the CMS NPPES public registry.