Mary Karlan, LCSW
NPI 1871976431 · Social Worker · Old Greenwich, CT
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Karlan, LCSW is a Social Worker provider in Old Greenwich, CT (NPI 1871976431).
Provider details
- NPI number
- 1871976431
- Entity type
- Individual
- Primary specialty
- Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 088338-1 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
10 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
- 2015-07-01
- Last updated
- 2020-10-22
- Certified
- 2020-10-22
Frequently asked questions
- What is Mary Karlan's NPI number?
- Mary Karlan's National Provider Identifier (NPI) is 1871976431, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Karlan's specialty?
- Mary Karlan is listed in the NPPES registry with a primary specialty of Social Worker (Behavioral Health & Social Service Providers).
- Where is Mary Karlan located?
- Mary Karlan's practice location on file with NPPES is 177 Sound Beach Ave Ste 6, Old Greenwich, CT 06870-1740.
- What is Mary Karlan's phone number?
- The practice phone number listed in the NPPES registry for Mary Karlan is (203) 493-0937.
- Does Mary Karlan accept Medicare?
- Mary Karlan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Karlan's NPI active?
- Yes — Mary Karlan's NPI (1871976431) is active in the NPPES registry as of the last update on 2020-10-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.