IndividualActive
Dennis O'Brien, D.C.
NPI 1801826573 · Chiropractor · Fair Oaks, CA
Dennis O'Brien, D.C. is a Chiropractor provider in Fair Oaks, CA (NPI 1801826573).
Provider details
- NPI number
- 1801826573
- Entity type
- Individual
- Primary specialty
- ChiropractorChiropractic Providers
- Credential
- D.C.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 19235 (CA)
Specialties & taxonomies
Chiropractic Providers
Profile Score
Detailed profile(91/100 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
4408 San Juan Ave.
Suite 2
Fair Oaks, CA 95628
Phone: (916) 965-1564
Fax: (916) 965-3868
Street-level locationGet directions
Mailing address
4408 San Juan Ave
Fair Oaks, CA 95628-6747
Registry dates
- Enumerated
- 2006-07-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Dennis O'Brien's NPI number?
- Dennis O'Brien's National Provider Identifier (NPI) is 1801826573, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dennis O'Brien's specialty?
- Dennis O'Brien is listed in the NPPES registry with a primary specialty of Chiropractor (Chiropractic Providers).
- Where is Dennis O'Brien located?
- Dennis O'Brien's practice location on file with NPPES is 4408 San Juan Ave., Fair Oaks, CA 95628.
- What is Dennis O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Dennis O'Brien is (916) 965-1564.
- Is Dennis O'Brien's NPI active?
- Yes — Dennis O'Brien's NPI (1801826573) 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.