Mcdonald & O'Callaghan, P.A.
NPI 1265553879 · Clinical Psychologist · Arnold, MD
Mcdonald & O'Callaghan, P.A. is a Clinical Psychologist organization in Arnold, MD (NPI 1265553879).
Provider details
- NPI number
- 1265553879
- Entity type
- Organization
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- P Gayle O'Callaghan, President(410) 757-9311
- License
- 1753 (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
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
Mailing address
Registry dates
- Enumerated
- 2007-04-02
- Last updated
- 2020-08-22
Frequently asked questions
- What is Mcdonald & O'Callaghan, P.A.'s NPI number?
- Mcdonald & O'Callaghan, P.A.'s National Provider Identifier (NPI) is 1265553879, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mcdonald & O'Callaghan, P.A.?
- Mcdonald & O'Callaghan, P.A. is classified in the NPPES registry as Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Mcdonald & O'Callaghan, P.A. located?
- Mcdonald & O'Callaghan, P.A.'s practice location on file with NPPES is 1521 Ritchie Hwy Ste 3e, Arnold, MD 21012-2747.
- What is Mcdonald & O'Callaghan, P.A.'s phone number?
- The practice phone number listed in the NPPES registry for Mcdonald & O'Callaghan, P.A. is (410) 757-9311.
- Who is the authorized official for Mcdonald & O'Callaghan, P.A.?
- The authorized official listed on Mcdonald & O'Callaghan, P.A.'s NPPES record is P Gayle O'Callaghan, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mcdonald & O'Callaghan, P.A.'s NPI active?
- Yes — Mcdonald & O'Callaghan, P.A.'s NPI (1265553879) is active in the NPPES registry as of the last update on 2020-08-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.