Mary Lewis, PSY.D.
NPI 1689386625 · Psychologist · Chevy Chase, MD
Mary Lewis, PSY.D. is a Psychologist provider in Chevy Chase, MD (NPI 1689386625).
Provider details
- NPI number
- 1689386625
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Cognitive & Behavioral Psychologist103TB0200X
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
- Clinical Child & Adolescent Psychologist103TC2200X
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
3 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
- 2022-12-21
- Last updated
- 2022-12-21
- Certified
- 2022-12-21
Frequently asked questions
- What is Mary Lewis's NPI number?
- Mary Lewis's National Provider Identifier (NPI) is 1689386625, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Lewis's specialty?
- Mary Lewis is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Mary Lewis located?
- Mary Lewis's practice location on file with NPPES is 5530 Wisconsin Ave Ste 1528, Chevy Chase, MD 20815-4300.
- What is Mary Lewis's phone number?
- The practice phone number listed in the NPPES registry for Mary Lewis is (240) 780-8214.
- Is Mary Lewis's NPI active?
- Yes — Mary Lewis's NPI (1689386625) is active in the NPPES registry as of the last update on 2022-12-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.