Margaret O'Callaghan, ANP-BC, WHNP-BC
NPI 1881818110 · Nurse Practitioner · Middleton, MA
Margaret O'Callaghan, ANP-BC, WHNP-BC is a Nurse Practitioner provider in Middleton, MA (NPI 1881818110).
Provider details
- NPI number
- 1881818110
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ANP-BC, WHNP-BC
- Sex
- Female
- Sole proprietor
- No
- License
- 234033 (MA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
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
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
- 2007-04-11
- Last updated
- 2018-11-16
Frequently asked questions
- What is Margaret O'Callaghan's NPI number?
- Margaret O'Callaghan's National Provider Identifier (NPI) is 1881818110, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret O'Callaghan's specialty?
- Margaret O'Callaghan is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Margaret O'Callaghan located?
- Margaret O'Callaghan's practice location on file with NPPES is Dys Ne Health Services, Middleton, MA 01949.
- What is Margaret O'Callaghan's phone number?
- The practice phone number listed in the NPPES registry for Margaret O'Callaghan is (978) 716-1183.
- Is Margaret O'Callaghan's NPI active?
- Yes — Margaret O'Callaghan's NPI (1881818110) is active in the NPPES registry as of the last update on 2018-11-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.