IndividualActive
John O'Brien, MSW
NPI 1740394477 · Clinical Social Worker · Baltimore, MD
John O'Brien, MSW is a Clinical Social Worker provider in Baltimore, MD (NPI 1740394477).
Provider details
- NPI number
- 1740394477
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- MSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 03699 (MD)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(90/100 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
10 N Greene St
Baltimore, MD 21201-1524
Phone: (410) 605-7012
Street-level locationGet directions
Mailing address
416 Sunny View Rd
Bel Air, MD 21014-5578
Registry dates
- Enumerated
- 2006-08-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is John O'Brien's NPI number?
- John O'Brien's National Provider Identifier (NPI) is 1740394477, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John O'Brien's specialty?
- John O'Brien is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is John O'Brien located?
- John O'Brien's practice location on file with NPPES is 10 N Greene St, Baltimore, MD 21201-1524.
- What is John O'Brien's phone number?
- The practice phone number listed in the NPPES registry for John O'Brien is (410) 605-7012.
- Is John O'Brien's NPI active?
- Yes — John O'Brien's NPI (1740394477) 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.