DR. MARK W. COLLAR M.D.
NPI 1659354553
Anesthesiology in Monroe, WI
About Dr. Mark W. Collar M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK W. COLLAR M.D. (NPI 1659354553) is an individual anesthesiology provider in Monroe, Wisconsin, licensed in Wisconsin (38554) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with Dickinson County Memorial Hospital, and is a graduate of Saint Louis University School Of Medicine (1994).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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. Mark W. Collar M.d. 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 Reassignments
5Medicare enrollment records show Mark Collar reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Monroe, WI 53566
- Reassigned Medicare billing, Wisconsin enrollment
- 376 clinicians in this Medicare group
Janesville, WI 53548
- Reassigned Medicare billing, Wisconsin enrollment
- 1,155 clinicians in this Medicare group
Mount Pleasant, WI 53405
- Reassigned Medicare billing, Wisconsin enrollment
- 162 clinicians in this Medicare group
Green Bay, WI 54311
- Reassigned Medicare billing, Wisconsin enrollment
- 275 clinicians in this Medicare group
Brentwood, TN 37027
- Reassigned Medicare billing, Michigan enrollment
- 44 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.
Areas of Expertise CMS Part B claims 4
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Dickinson County Memorial Hospital
Acute Care Hospitals · Iron Mountain, 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.
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 Mark Collar's NPI number?
The NPI number for Mark Collar is 1659354553. It was assigned to this individual provider in the NPPES registry on November 23, 2005.
Where is Mark Collar located?
Mark Collar practices at 515 22nd Ave Monroe Clinic, Monroe, WI 53566. The listed phone number is (608) 324-2222.
What is Mark Collar's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Mark Collar enrolled in Medicare?
Yes. Mark Collar 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 organizations bill Medicare for Mark Collar's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Collar reassigns Medicare benefits to 5 organizations: The Monroe Clinic, Inc. (Monroe, WI), Mercy Health System Corporation (Janesville, WI), Racine Anesthesia Services, LLC (Mount Pleasant, WI), Baycare Clinic LLP (Green Bay, WI) and Hospitalist Medicine Physicians Of Michigan-Alpena PLLC (Brentwood, TN). Each 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 Mark Collar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mark Collar affiliated with any hospitals?
According to CMS data, Mark Collar is affiliated with Dickinson County Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Mark Collar was last updated on February 21, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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. Mark W. Collar, M.D. · NPI 1659354553
Anesthesiology physician in Monroe, Wisconsin. Individual provider, active in the CMS NPPES registry since November 23, 2005.
## Identity
- **NPI:** 1659354553 (Entity type: Individual)
- **Enumerated:** November 23, 2005
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 38554 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 515 22ND AVE, MONROE CLINIC, Monroe, WI 53566-1569
- **Phone:** (608) 324-2222
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): The Monroe Clinic, Inc. (NPI 1386720548, Monroe, WI); Mercy Health System Corporation (NPI 1598718603, Janesville, WI); Racine Anesthesia Services, LLC (NPI 1467782748, Mount Pleasant, WI); Baycare Clinic LLP (NPI 1588609648, Green Bay, WI); Hospitalist Medicine Physicians Of Michigan-Alpena PLLC (NPI 1043818156, Brentwood, TN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 1994
## Record status
- **NPPES last updated:** February 21, 2017
- **Other identifiers:** Medicare UPIN G94723 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1659354553) · Data from the CMS NPPES public registry.