IndividualActive
Donald Marks, PSYD
NPI 1851646475 · Health Psychologist · Wilmington, DE
Donald Marks, PSYD is a Health Psychologist provider in Wilmington, DE (NPI 1851646475).
Provider details
- NPI number
- 1851646475
- Entity type
- Individual
- Primary specialty
- Health PsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD
- Sex
- Male
- Sole proprietor
- No
- License
- PS017170 (PA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(80/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 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
1601 Kirkwood Highway
Wilmington, DE 19805
Phone: (215) 534-0398
Street-level locationGet directions
Mailing address
2115 Stackhouse Dr
Yardley, PA 19067-1839
Registry dates
- Enumerated
- 2012-07-19
- Last updated
- 2012-07-19
Frequently asked questions
- What is Donald Marks's NPI number?
- Donald Marks's National Provider Identifier (NPI) is 1851646475, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Donald Marks's specialty?
- Donald Marks is listed in the NPPES registry with a primary specialty of Health Psychologist (Behavioral Health & Social Service Providers).
- Where is Donald Marks located?
- Donald Marks's practice location on file with NPPES is 1601 Kirkwood Highway, Wilmington, DE 19805.
- What is Donald Marks's phone number?
- The practice phone number listed in the NPPES registry for Donald Marks is (215) 534-0398.
- Is Donald Marks's NPI active?
- Yes — Donald Marks's NPI (1851646475) is active in the NPPES registry as of the last update on 2012-07-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.