Mary O'Brien, LCSW, CASAC
NPI 1962848820 · Clinical Social Worker · New York, NY
Mary O'Brien, LCSW, CASAC is a Clinical Social Worker provider in New York, NY (NPI 1962848820).
Provider details
- NPI number
- 1962848820
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW, CASAC
- Sex
- Female
- Sole proprietor
- No
- License
- 30264 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
13 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
- 2013-05-20
- Last updated
- 2020-08-26
- Certified
- 2020-08-26
Frequently asked questions
- What is Mary O'Brien's NPI number?
- Mary O'Brien's National Provider Identifier (NPI) is 1962848820, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary O'Brien's specialty?
- Mary O'Brien is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary O'Brien located?
- Mary O'Brien's practice location on file with NPPES is 1901 1st Ave, New York, NY 10029-7494.
- What is Mary O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Mary O'Brien is (212) 423-8255.
- Is Mary O'Brien's NPI active?
- Yes — Mary O'Brien's NPI (1962848820) is active in the NPPES registry as of the last update on 2020-08-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.