Dia O'Brien, APRN
NPI 1750168951 · Psychiatric/Mental Health Nurse Practitioner · New Haven, CT
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Dia O'Brien, APRN is a Psychiatric/Mental Health Nurse Practitioner provider in New Haven, CT (NPI 1750168951).
Provider details
- NPI number
- 1750168951
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- 12121 (CT)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
2 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
- 2023-09-11
- Last updated
- 2023-09-11
- Certified
- 2023-09-11
Frequently asked questions
- What is Dia O'Brien's NPI number?
- Dia O'Brien's National Provider Identifier (NPI) is 1750168951, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Dia O'Brien's specialty?
- Dia O'Brien is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Dia O'Brien located?
- Dia O'Brien's practice location on file with NPPES is 34 Park St, New Haven, CT 06519-1109.
- What is Dia O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Dia O'Brien is (203) 974-7560.
- Does Dia O'Brien accept Medicare?
- Dia O'Brien is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Dia O'Brien's NPI active?
- Yes — Dia O'Brien's NPI (1750168951) is active in the NPPES registry as of the last update on 2023-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.