IndividualActive
Sharon Hasslen, M.S.
NPI 1952701955 · Psychologist · Fairfield, CA
Sharon Hasslen, M.S. is a Psychologist provider in Fairfield, CA (NPI 1952701955).
Provider details
- NPI number
- 1952701955
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- M.S.
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Established profile(69/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 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
801 Empire St
Fairfield, CA 94533-5702
Phone: (707) 425-5744
Street-level locationGet directions
Mailing address
805 Evergreen St
Menlo Park, CA 94025-5760
Registry dates
- Enumerated
- 2014-08-27
- Last updated
- 2014-08-27
Frequently asked questions
- What is Sharon Hasslen's NPI number?
- Sharon Hasslen's National Provider Identifier (NPI) is 1952701955, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sharon Hasslen's specialty?
- Sharon Hasslen is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Sharon Hasslen located?
- Sharon Hasslen's practice location on file with NPPES is 801 Empire St, Fairfield, CA 94533-5702.
- What is Sharon Hasslen's phone number?
- The practice phone number listed in the NPPES registry for Sharon Hasslen is (707) 425-5744.
- Is Sharon Hasslen's NPI active?
- Yes — Sharon Hasslen's NPI (1952701955) is active in the NPPES registry as of the last update on 2014-08-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.