Mark O'Neill, LCSW-C
NPI 1588653950 · Clinical Social Worker · Kingsville, MD
Mark O'Neill, LCSW-C is a Clinical Social Worker provider in Kingsville, MD (NPI 1588653950).
Provider details
- NPI number
- 1588653950
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW-C
- Sex
- Male
- License
- 00218 (MD)
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
20 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
- 2005-10-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark O'Neill's NPI number?
- Mark O'Neill's National Provider Identifier (NPI) is 1588653950, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark O'Neill's specialty?
- Mark O'Neill is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark O'Neill located?
- Mark O'Neill's practice location on file with NPPES is 19 Elray Rd, Kingsville, MD 21087-1741.
- What is Mark O'Neill's phone number?
- The practice phone number listed in the NPPES registry for Mark O'Neill is (410) 592-7517.
- Is Mark O'Neill's NPI active?
- Yes — Mark O'Neill's NPI (1588653950) 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.