Mary Johnston, MA,OTR/L
NPI 1174778336 · Mental Health Counselor · Gardena, CA
Mary Johnston, MA,OTR/L is a Mental Health Counselor provider in Gardena, CA (NPI 1174778336).
Provider details
- NPI number
- 1174778336
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- MA,OTR/L
- Sex
- Female
- Sole proprietor
- No
- License
- 1610 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 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
Mailing address
Registry dates
- Enumerated
- 2008-12-01
- Last updated
- 2008-12-01
Frequently asked questions
- What is Mary Johnston's NPI number?
- Mary Johnston's National Provider Identifier (NPI) is 1174778336, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Johnston's specialty?
- Mary Johnston is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Mary Johnston located?
- Mary Johnston's practice location on file with NPPES is 130 W Victoria St, Gardena, CA 90248-3523.
- What is Mary Johnston's phone number?
- The practice phone number listed in the NPPES registry for Mary Johnston is (310) 715-2020.
- Is Mary Johnston's NPI active?
- Yes — Mary Johnston's NPI (1174778336) is active in the NPPES registry as of the last update on 2008-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.