Tam Nguyen-Louie, PHD
NPI 1659866390 · Psychologist · Columbia, MD
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tam Nguyen-Louie, PHD is a Psychologist provider in Columbia, MD (NPI 1659866390).
Provider details
- NPI number
- 1659866390
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 06548 (MD)
Specialties & taxonomies
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
8 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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
Additional practice locations (2)
- 733 N BroadwayBaltimore, MD 21205-1832Phone: (410) 955-5000
- 5116 Dorsey Hall Dr Ste BEllicott City, MD 21042-7877Phone: (410) 995-8274
Registry dates
- Enumerated
- 2018-06-26
- Last updated
- 2021-03-01
- Certified
- 2021-03-01
Frequently asked questions
- What is Tam Nguyen-Louie's NPI number?
- Tam Nguyen-Louie's National Provider Identifier (NPI) is 1659866390, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tam Nguyen-Louie's specialty?
- Tam Nguyen-Louie is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Tam Nguyen-Louie located?
- Tam Nguyen-Louie's practice location on file with NPPES is 5570 Sterrett Pl Ste 310, Columbia, MD 21044-2680.
- What is Tam Nguyen-Louie's phone number?
- The practice phone number listed in the NPPES registry for Tam Nguyen-Louie is (443) 355-7572.
- Does Tam Nguyen-Louie accept Medicare?
- Tam Nguyen-Louie is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tam Nguyen-Louie's NPI active?
- Yes — Tam Nguyen-Louie's NPI (1659866390) is active in the NPPES registry as of the last update on 2021-03-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.