IndividualActive
Mariellen O'Brien
NPI 1578697637 · Social Worker · Auburn, CA
Mariellen O'Brien is a Social Worker provider in Auburn, CA (NPI 1578697637).
Provider details
- NPI number
- 1578697637
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(83/100 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
83% 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
11716 Enterprise Dr
Auburn, CA 95603-3732
Phone: (530) 889-6700
Street-level locationGet directions
Mailing address
405 Hanworth Ct
Roseville, CA 95661-5102
Registry dates
- Enumerated
- 2007-03-14
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mariellen O'Brien's NPI number?
- Mariellen O'Brien's National Provider Identifier (NPI) is 1578697637, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mariellen O'Brien's specialty?
- Mariellen O'Brien is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Mariellen O'Brien located?
- Mariellen O'Brien's practice location on file with NPPES is 11716 Enterprise Dr, Auburn, CA 95603-3732.
- What is Mariellen O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Mariellen O'Brien is (530) 889-6700.
- Is Mariellen O'Brien's NPI active?
- Yes — Mariellen O'Brien's NPI (1578697637) 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.