Mark A. Cassellius, D.C.
Chiropractor · Onalaska, WI
Mark A. Cassellius, D.C. is a chiropractor with a practice address in Onalaska, Wisconsin, and NPI 1669433462, issued on Mar 31, 2006. Check the license (Wisconsin 2293, as entered in NPPES) with the Wisconsin board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark A. Cassellius
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- 2293 WI
Self-reported in NPPES; status is on the state search - Practice location
- 419 Sand Lake RD, Onalaska, WI 54650
- Phone
- (608) 783-3307
- Enumerated
- Mar 31, 2006
- Record last updated
- Apr 26, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (608) 779-9728
- Medicaid ID
- 38800700 WI
- Entity
- Type 1 · individual
Also registered at 419 Sand Lake RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brennan Quinn, LACAcupuncturist1720544620
- Carolyn SeraukasMassage Therapist1205181310
Verify Mark A. Cassellius in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 2293Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30 chiropractor records list a practice address in Onalaska
They are 30 of the 568 NPPES records with a practice address in Onalaska, and 2,550 chiropractor records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 30 in Onalaska → All 2,550 in Wisconsin → Every provider in Onalaska →
Other chiropractor records in Wisconsin
- Gregory Abbott, D.C.Appleton, WI1942588942
- Miranda AbbottAppleton, WI1932487931
- Christopher Abel, D.C.Neenah, WI1578691143
- James Abens, DCEau Claire, WI1528160496
- Jeffrey Aberle, D.C.Madison, WI1144310582
- Abdoullah Aboulhassani, D.CAppleton, WI1093806622
- Aaron Abplanalp, D.C.Madison, WI1578600656
- Randall Adams, D.C.Chippewa Falls, WI1134126519
- Teri Adams, D.C.Baldwin, WI1770653602
- John Aderholdt, D.C.Pickerel, WI1487710075
Common questions
What is Mark A. Cassellius, D.C.'s NPI number?
Mark A. Cassellius, D.C.'s National Provider Identifier (NPI) is 1669433462, issued on Mar 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Cassellius, D.C. located?
The NPPES record lists a practice address at 419 Sand Lake RD, Onalaska, WI, 54650. Phone: (608) 783-3307. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Cassellius, D.C.'s license?
NPPES lists Wisconsin license number 2293, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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.