IndividualActive
John Duff, D.C.
NPI 1598971582 · Chiropractor · Peoria, AZ
John Duff, D.C. is a Chiropractor provider in Peoria, AZ (NPI 1598971582).
Provider details
- NPI number
- 1598971582
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Credential
- D.C.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 7297 (AZ)
Specialties & taxonomies
Chiropractic Providers
Profile Score
Detailed profile(89/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
8466 W Peoria Ave
#11
Peoria, AZ 85345-6548
Phone: (623) 776-1555
Fax: (623) 845-0667
Street-level locationGet directions
Mailing address
Po Box 45
Peoria, AZ 85380-0045
Registry dates
- Enumerated
- 2007-05-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Duff's NPI number?
- John Duff's National Provider Identifier (NPI) is 1598971582, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Duff's specialty?
- John Duff is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is John Duff located?
- John Duff's practice location on file with NPPES is 8466 W Peoria Ave, Peoria, AZ 85345-6548.
- What is John Duff's phone number?
- The practice phone number listed in the NPPES registry for John Duff is (623) 776-1555.
- Is John Duff's NPI active?
- Yes — John Duff's NPI (1598971582) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.