Mary Stringer, LCSW
NPI 1083884217 · Clinical Social Worker · Alexandria, VA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Stringer, LCSW is a Clinical Social Worker provider in Alexandria, VA (NPI 1083884217).
Provider details
- NPI number
- 1083884217
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- 0904005917 (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 tenure28% of score
18 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
219 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy, 45 Minutes90834 | 127 | $81 |
| Psychotherapy, 30 Minutes90832 | 71 | $56 |
| Psychiatric Diagnostic Evaluation90791 | 21 | $137 |
Typical Medicare-allowed amounts for these services range $56–$137 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 5045 Backlick RdAnnandale, VA 22003-6045Phone: (703) 914-1082Fax: (703) 914-3920
Registry dates
- Enumerated
- 2008-03-04
- Last updated
- 2020-08-13
- Certified
- 2020-08-13
Frequently asked questions
- What is Mary Stringer's NPI number?
- Mary Stringer's National Provider Identifier (NPI) is 1083884217, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Stringer's specialty?
- Mary Stringer is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Stringer located?
- Mary Stringer's practice location on file with NPPES is 325 S Washington St, Alexandria, VA 22314-3627.
- What is Mary Stringer's phone number?
- The practice phone number listed in the NPPES registry for Mary Stringer is (703) 683-7220.
- Does Mary Stringer accept Medicare?
- Mary Stringer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Stringer's NPI active?
- Yes — Mary Stringer's NPI (1083884217) is active in the NPPES registry as of the last update on 2020-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.