William Mcswain
NPI 1821789371 · Addiction (Substance Use Disorder) Counselor · Washington, DC
William Mcswain is a Addiction (Substance Use Disorder) Counselor provider in Washington, DC (NPI 1821789371).
Provider details
- NPI number
- 1821789371
- Entity type
- Individual
- Primary specialty
- Addiction (Substance Use Disorder) CounselorBehavioral Health & Social Service Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- CACI1059 (DC)
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
3 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
- 2023-05-16
- Last updated
- 2023-05-16
- Certified
- 2023-05-16
Frequently asked questions
- What is William Mcswain's NPI number?
- William Mcswain's National Provider Identifier (NPI) is 1821789371, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mcswain's specialty?
- William Mcswain is listed in the NPPES registry with a primary specialty of Addiction (Substance Use Disorder) Counselor (Behavioral Health & Social Service Providers).
- Where is William Mcswain located?
- William Mcswain's practice location on file with NPPES is 2759 Martin Luther King Jr Ave Se, Washington, DC 20032-2646.
- What is William Mcswain's phone number?
- The practice phone number listed in the NPPES registry for William Mcswain is (202) 827-9961.
- Is William Mcswain's NPI active?
- Yes — William Mcswain's NPI (1821789371) is active in the NPPES registry as of the last update on 2023-05-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.