Mary Darby, RN
NPI 1417659913 · Psychiatric/Mental Health Registered Nurse · Lexington, MA
Mary Darby, RN is a Psychiatric/Mental Health Registered Nurse provider in Lexington, MA (NPI 1417659913).
Provider details
- NPI number
- 1417659913
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Registered NurseNursing Service Providers
- Credential
- RN
- Sex
- Female
- Sole proprietor
- Yes
- License
- RN2326271 (MA)
Specialties & taxonomies
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 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
- 2023-03-20
- Last updated
- 2023-03-20
- Certified
- 2023-03-17
Frequently asked questions
- What is Mary Darby's NPI number?
- Mary Darby's National Provider Identifier (NPI) is 1417659913, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Darby's specialty?
- Mary Darby is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Registered Nurse (Nursing Service Providers).
- Where is Mary Darby located?
- Mary Darby's practice location on file with NPPES is 125 Hartwell Ave, Lexington, MA 02421-3100.
- What is Mary Darby's phone number?
- The practice phone number listed in the NPPES registry for Mary Darby is (781) 861-0890.
- Is Mary Darby's NPI active?
- Yes — Mary Darby's NPI (1417659913) is active in the NPPES registry as of the last update on 2023-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.