Sean C. Duffy, D.C.
Chiropractor · Appleton, WI
Sean C. Duffy, D.C. is a chiropractor with a practice address in Appleton, Wisconsin, and NPI 1083682348, issued on Mar 10, 2006. Check the license (Wisconsin 3260, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sean C. Duffy
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- 3260 WI
Self-reported in NPPES; status is on the state search - Practice location
- 811 N Lynndale Dr, Appleton, WI 54914
- Phone
- (920) 733-9330
- Enumerated
- Mar 10, 2006
- Record last updated
- Nov 16, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (920) 733-7220
- Medicaid ID
- 38892200 WI
- Medicare enrollment
- Enrolled (PECOS I20040324000716); accepts Medicare assignment
- Medical or professional school
- Palmer College Chiropractic - West Sunnyvale, 1995
- Entity
- Type 1 · individual
8 nearest chiropractor records → All 2,550 in Wisconsin → Look up another NPI →
Also registered at 811 N Lynndale Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karl Huiting, DCChiropractor1376653295
- Casey Rosendahl, D.C.Chiropractor1508600446
- Steven Weber, DDSGeneral Practice Dentistry1811090947
Verify Sean C. Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 3260Check 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
- Duffy Chiropractic IncAppleton, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sean C. Duffy among 2,550 chiropractor records in Wisconsin
Sean C. Duffy, D.C. is one of 2,550 chiropractor records with a practice address in Wisconsin. 32% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 60% newer
- In a Medicare fileYes · 32% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1995 · median 2005 among the 1,520 with a school on file
- Record last updated2010 · 69% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 111N00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
88 chiropractor records list a practice address in Appleton
They are 88 of the 3,249 NPPES records with a practice address in Appleton, and 2,550 chiropractor records in Wisconsin.
All 2,550 in Wisconsin → Every provider in Appleton → Chiropractor nationwide →
The 8 chiropractor records with the nearest ZIP codes
- Michael Croninger, D.C.Appleton, WI 549141477876134
- Judy Ellefson PeilAppleton, WI 549141770578106
- Karl Huiting, DCAppleton, WI 549141376653295
- Jason Lang, D.C.Appleton, WI 549141477605244
- Christopher Matt, DCAppleton, WI 549141548370265
- David Meyer, D.C.Appleton, WI 549141518129931
- Hien Nguyen, D.C.Appleton, WI 549141659438109
- Khristine Otto, D.C.Appleton, WI 549141902960750
Common questions
What is Sean C. Duffy, D.C.'s NPI number?
Sean C. Duffy, D.C.'s National Provider Identifier (NPI) is 1083682348, issued on Mar 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sean C. Duffy, D.C. located?
The NPPES record lists a practice address at 811 N Lynndale Dr, Appleton, WI, 54914. Phone: (920) 733-9330. Providers update this record themselves, so call before visiting.
How can I verify Sean C. Duffy, D.C.'s license?
NPPES lists Wisconsin license number 3260, 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.