Carolyn O'Donnell-Walker, M.D.
NPI 1922205020 · Pediatrics Physician · Acton, MA
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carolyn O'Donnell-Walker, M.D. is a Pediatrics Physician provider in Acton, MA (NPI 1922205020).
Provider details
- NPI number
- 1922205020
- Entity type
- Individual
- Primary specialty
- Pediatrics PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 232565 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2007-07-02
- Last updated
- 2019-05-29
Frequently asked questions
- What is Carolyn O'Donnell-Walker's NPI number?
- Carolyn O'Donnell-Walker's National Provider Identifier (NPI) is 1922205020, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carolyn O'Donnell-Walker's specialty?
- Carolyn O'Donnell-Walker is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).
- Where is Carolyn O'Donnell-Walker located?
- Carolyn O'Donnell-Walker's practice location on file with NPPES is 321 Main St, Acton, MA 01720-3718.
- What is Carolyn O'Donnell-Walker's phone number?
- The practice phone number listed in the NPPES registry for Carolyn O'Donnell-Walker is (978) 635-8700.
- Does Carolyn O'Donnell-Walker accept Medicare?
- Carolyn O'Donnell-Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carolyn O'Donnell-Walker's NPI active?
- Yes — Carolyn O'Donnell-Walker's NPI (1922205020) is active in the NPPES registry as of the last update on 2019-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.