David Diffee, PHD
NPI 1790870590 · Psychologist · Denver, CO
David Diffee, PHD is a Psychologist provider in Denver, CO (NPI 1790870590).
Provider details
- NPI number
- 1790870590
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 4379 (CO)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
- 2006-10-04
- Last updated
- 2025-09-11
Frequently asked questions
- What is David Diffee's NPI number?
- David Diffee's National Provider Identifier (NPI) is 1790870590, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Diffee's specialty?
- David Diffee is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is David Diffee located?
- David Diffee's practice location on file with NPPES is 1777 S Harrison St, Denver, CO 80210.
- What is David Diffee's phone number?
- The practice phone number listed in the NPPES registry for David Diffee is (303) 757-4399.
- Is David Diffee's NPI active?
- Yes — David Diffee's NPI (1790870590) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.