David Harder, PH.D.
NPI 1801973227 · Clinical Psychologist · Lincoln, MA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
David Harder, PH.D. is a Clinical Psychologist provider in Lincoln, MA (NPI 1801973227).
Provider details
- NPI number
- 1801973227
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2323 (MA)
Specialties & taxonomies
Behavioral Health & Social Service 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
- 2006-11-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is David Harder's NPI number?
- David Harder's National Provider Identifier (NPI) is 1801973227, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Harder's specialty?
- David Harder is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is David Harder located?
- David Harder's practice location on file with NPPES is 112 S Great Rd, Lincoln, MA 01773-4700.
- What is David Harder's phone number?
- The practice phone number listed in the NPPES registry for David Harder is (781) 259-8122.
- Does David Harder accept Medicare?
- David Harder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is David Harder's NPI active?
- Yes — David Harder's NPI (1801973227) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.