Grant Charles O'Brien, D.C.
Chiropractor · Neenah, WI
Grant Charles O'Brien, D.C. is a chiropractor with a practice address in Neenah, Wisconsin, and NPI 1851628283, issued on Nov 5, 2009. Check the license (Wisconsin 4582-12, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Grant Charles O'Brien
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- 4582-12 WI
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Wisconsin Ave, Neenah, WI 54956
- Phone
- (920) 720-6300
- Enumerated
- Nov 5, 2009
- Record last updated
- Feb 12, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (920) 720-6315
- Medicare enrollment
- Enrolled (PECOS I20100811000572); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 200 W Wisconsin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Courtney Cowie, L.M.B.T.Massage Therapist1770919110
- Tessa Loewe, L.M.TMassage Therapist1629377049
Verify Grant Charles O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 4582-12Check 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
- Align Chiropractic LLCNeenah, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
28 chiropractor records list a practice address in Neenah
They are 28 of the 919 NPPES records with a practice address in Neenah, and 2,550 chiropractor records in Wisconsin.
All 28 in Neenah → All 2,550 in Wisconsin → Every provider in Neenah →
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 Grant Charles O'Brien, D.C.'s NPI number?
Grant Charles O'Brien, D.C.'s National Provider Identifier (NPI) is 1851628283, issued on Nov 5, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Grant Charles O'Brien, D.C. located?
The NPPES record lists a practice address at 200 W Wisconsin Ave, Neenah, WI, 54956. Phone: (920) 720-6300. Providers update this record themselves, so call before visiting.
How can I verify Grant Charles O'Brien, D.C.'s license?
NPPES lists Wisconsin license number 4582-12, 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. 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.