Sophia Mastakas, LCSW
NPI 1386511764 · Clinical Social Worker · Alexandria, VA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sophia Mastakas, LCSW is a Clinical Social Worker provider in Alexandria, VA (NPI 1386511764).
Provider details
- NPI number
- 1386511764
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 0904019304 (VA)
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
Under 1 yr in 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
- 2025-10-21
- Last updated
- 2025-10-24
- Certified
- 2025-10-24
Frequently asked questions
- What is Sophia Mastakas's NPI number?
- Sophia Mastakas's National Provider Identifier (NPI) is 1386511764, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sophia Mastakas's specialty?
- Sophia Mastakas is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Sophia Mastakas located?
- Sophia Mastakas's practice location on file with NPPES is 6901 S Van Dorn St, Alexandria, VA 22315-3961.
- What is Sophia Mastakas's phone number?
- The practice phone number listed in the NPPES registry for Sophia Mastakas is (703) 313-6300.
- Does Sophia Mastakas accept Medicare?
- Sophia Mastakas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sophia Mastakas's NPI active?
- Yes — Sophia Mastakas's NPI (1386511764) is active in the NPPES registry as of the last update on 2025-10-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.