IndividualActive
Katherine O'Brien, RD, LDN
NPI 1588129639 · Registered Dietitian · Acton, MA
Katherine O'Brien, RD, LDN is a Registered Dietitian provider in Acton, MA (NPI 1588129639).
Provider details
- NPI number
- 1588129639
- Entity type
- Individual
- Primary specialty
- Registered DietitianDietary & Nutritional Service Providers
- Credential
- RD, LDN
- Sex
- Female
- Sole proprietor
- Yes
- License
- 4418 (MA)
Specialties & taxonomies
Dietary & Nutritional Service Providers
Profile Score
Established profile(67/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 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
321 Main St
Acton, MA 01720-3799
Phone: (978) 635-8700
Street-level locationGet directions
Mailing address
33 Marlboro Rd
Stow, MA 01775-1401
Registry dates
- Enumerated
- 2019-02-04
- Last updated
- 2021-02-11
- Certified
- 2021-02-11
Frequently asked questions
- What is Katherine O'Brien's NPI number?
- Katherine O'Brien's National Provider Identifier (NPI) is 1588129639, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine O'Brien's specialty?
- Katherine O'Brien is listed in the NPPES registry with a primary specialty of Registered Dietitian (Dietary & Nutritional Service Providers).
- Where is Katherine O'Brien located?
- Katherine O'Brien's practice location on file with NPPES is 321 Main St, Acton, MA 01720-3799.
- What is Katherine O'Brien's phone number?
- The practice phone number listed in the NPPES registry for Katherine O'Brien is (978) 635-8700.
- Is Katherine O'Brien's NPI active?
- Yes — Katherine O'Brien's NPI (1588129639) is active in the NPPES registry as of the last update on 2021-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.