John Matthew Duff, D.C.
Chiropractor · Peoria, AZ
John Matthew Duff, D.C. is a chiropractor with a practice address in Peoria, Arizona, and NPI 1598971582, issued on May 15, 2007. Check the license (Arizona 7297, as entered in NPPES) with the Arizona board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John Matthew Duff
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- 7297 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 8466 W Peoria Ave, Peoria, AZ 85345
- Phone
- (623) 776-1555
- Enumerated
- May 15, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (623) 845-0667
- Entity
- Type 1 · individual
8 nearest chiropractor records → All 1,971 in Arizona → Look up another NPI →
Also registered at 8466 W Peoria Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Evans, MDInternal Medicine Physician1669560389
- Kim MolinaClinical Social Worker1326408006
Verify John Matthew Duff in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Arizona board licenses this profession
Search for license 7297Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
John Matthew Duff among 1,971 chiropractor records in Arizona
John Matthew Duff, D.C. is one of 1,971 chiropractor records with a practice address in Arizona. 14% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 42% of them.
- NPI issued2007 · 42% of these records are older, 36% newer
- In a Medicare fileNo · 14% of these records are
- In the CMS Doctors and Clinicians fileNo · 35% of these records are
- Record last updated2007 · 76% 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 Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
54 chiropractor records list a practice address in Peoria
They are 54 of the 2,528 NPPES records with a practice address in Peoria, and 1,971 chiropractor records in Arizona. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,971 in Arizona → Every provider in Peoria → Chiropractor nationwide →
The 8 chiropractor records with the nearest ZIP codes
- Gary Collins, D.C.Peoria, AZ 853451669438099
- Catherine Devore Meehan, D.C.Peoria, AZ 853451497865661
- Russell Erhardt, DCPeoria, AZ 853451891774493
- Stephen Ossipinsky, D.C.Peoria, AZ 853451710953948
- Tyler Powell, D.C.Peoria, AZ 853451598971608
- David Thomas, D.C.Peoria, AZ 853451790173920
- Vernon York, D.C.Peoria, AZ 853451528172525
- Patrick Bradley, D.C.Litchfield Park, AZ 853401356449169
Common questions
What is John Matthew Duff, D.C.'s NPI number?
John Matthew Duff, D.C.'s National Provider Identifier (NPI) is 1598971582, issued on May 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Matthew Duff, D.C. located?
The NPPES record lists a practice address at 8466 W Peoria Ave, Peoria, AZ, 85345. Phone: (623) 776-1555. Providers update this record themselves, so call before visiting.
How can I verify John Matthew Duff, D.C.'s license?
NPPES lists Arizona license number 7297, as entered by the provider. Search the Arizona 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.