Mark W. Collar, M.D.
Anesthesiology Physician · Monroe, WI
Mark W. Collar, M.D. is an anesthesiology physician with a practice address in Monroe, Wisconsin, and NPI 1659354553, issued on Nov 23, 2005. Check the license (Wisconsin 38554, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mark W. Collar
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 38554 WI
Self-reported in NPPES; status is on the state search - Practice location
- 515 22ND Ave, Monroe, WI 53566
- Phone
- (608) 324-2222
- Enumerated
- Nov 23, 2005
- Record last updated
- Feb 21, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20230815003117); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,313 in Wisconsin → Look up another NPI →
Also registered at 515 22ND Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark W. Collar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 38554Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Hospitalist Medicine Physicians OF Michigan-Alpena PLLCIron Mountain, MI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark W. Collar among 1,313 anesthesiology physician records in Wisconsin
Mark W. Collar, M.D. is one of 1,313 anesthesiology physician records with a practice address in Wisconsin. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 80% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1994 · median 2006 among the 872 with a school on file
- Record last updated2017 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
7 anesthesiology physician records list a practice address in Monroe
They are 7 of the 433 NPPES records with a practice address in Monroe, and 1,313 anesthesiology physician records in Wisconsin.
All 1,313 in Wisconsin → Every provider in Monroe → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Martin Arnold, MDMonroe, WI 535661528088499
- Steven Borene, M.D.Monroe, WI 535661851345383
- Dana Doll, D.O.Monroe, WI 535661255545695
- Christine Hunsicker, MDMonroe, WI 535661396062782
- Meghan Oujiri, MDMonroe, WI 535661699839373
- Kishor Rana, MDMonroe, WI 535661265506638
- Pamela Avery, MDMadison, WI 535621376627505
- Susan Goelzer, MD MS CPEMiddleton, WI 535621780650275
Common questions
What is Mark W. Collar, M.D.'s NPI number?
Mark W. Collar, M.D.'s National Provider Identifier (NPI) is 1659354553, issued on Nov 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Mark W. Collar, M.D. located?
The NPPES record lists a practice address at 515 22ND Ave, Monroe, WI, 53566. Phone: (608) 324-2222. Providers update this record themselves, so call before visiting.
How can I verify Mark W. Collar, M.D.'s license?
NPPES lists Wisconsin license number 38554, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.