Sonja Fischer
NPI 1912425950 · Clinical Social Worker · Alexandria, VA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sonja Fischer is a Clinical Social Worker provider in Alexandria, VA (NPI 1912425950).
Provider details
- NPI number
- 1912425950
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- No
- License
- 0904009948 (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
8 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
- 2017-08-30
- Last updated
- 2024-06-18
- Certified
- 2024-06-18
Frequently asked questions
- What is Sonja Fischer's NPI number?
- Sonja Fischer's National Provider Identifier (NPI) is 1912425950, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sonja Fischer's specialty?
- Sonja Fischer is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Sonja Fischer located?
- Sonja Fischer's practice location on file with NPPES is 4850 Mark Center Dr, Alexandria, VA 22311-1882.
- What is Sonja Fischer's phone number?
- The practice phone number listed in the NPPES registry for Sonja Fischer is (703) 746-3530.
- Does Sonja Fischer accept Medicare?
- Sonja Fischer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sonja Fischer's NPI active?
- Yes — Sonja Fischer's NPI (1912425950) is active in the NPPES registry as of the last update on 2024-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.