Mark Onderdonk
NPI 1952710469 · Developmental Therapist · Worcester, MA
Mark Onderdonk is a Developmental Therapist provider in Worcester, MA (NPI 1952710469).
Provider details
- NPI number
- 1952710469
- Entity type
- Individual
- Primary specialty
- Developmental TherapistRespiratory, Developmental, Rehabilitative and Restorative Service Providers
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Respiratory, Developmental, Rehabilitative and Restorative Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2014-08-08
- Last updated
- 2014-08-08
Frequently asked questions
- What is Mark Onderdonk's NPI number?
- Mark Onderdonk's National Provider Identifier (NPI) is 1952710469, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Onderdonk's specialty?
- Mark Onderdonk is listed in the NPPES registry with a primary specialty of Developmental Therapist (Respiratory, Developmental, Rehabilitative and Restorative Service Providers).
- Where is Mark Onderdonk located?
- Mark Onderdonk's practice location on file with NPPES is 345a Greenwood Street, Worcester, MA 01607.
- What is Mark Onderdonk's phone number?
- The practice phone number listed in the NPPES registry for Mark Onderdonk is (508) 363-0200.
- Is Mark Onderdonk's NPI active?
- Yes — Mark Onderdonk's NPI (1952710469) is active in the NPPES registry as of the last update on 2014-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.