Mark Chapin, PH.D., LISW
NPI 1710177704 · Clinical Social Worker · Washington, DC
Mark Chapin, PH.D., LISW is a Clinical Social Worker provider in Washington, DC (NPI 1710177704).
Provider details
- NPI number
- 1710177704
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- PH.D., LISW
- Sex
- Male
- Sole proprietor
- No
- License
- I-7114 (OH)
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
18 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
- 2007-07-26
- Last updated
- 2007-07-26
Frequently asked questions
- What is Mark Chapin's NPI number?
- Mark Chapin's National Provider Identifier (NPI) is 1710177704, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Chapin's specialty?
- Mark Chapin is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Chapin located?
- Mark Chapin's practice location on file with NPPES is Wramc Bldg 2, Department of Social Work, Washington, DC 20307-0001.
- What is Mark Chapin's phone number?
- The practice phone number listed in the NPPES registry for Mark Chapin is (202) 782-6378.
- Is Mark Chapin's NPI active?
- Yes — Mark Chapin's NPI (1710177704) is active in the NPPES registry as of the last update on 2007-07-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.