Mark Sullivan LLC
NPI 1710470711 · Clinical Social Worker · Silver Spring, MD
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Sullivan LLC is a Clinical Social Worker organization in Silver Spring, MD (NPI 1710470711).
Provider details
- NPI number
- 1710470711
- Entity type
- Organization
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Organization subpart
- No
- Authorized official
- Mark Sullivan, Clinical Social Worker(202) 264-0070
- License
- LC50079401 (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
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
- 2018-06-13
- Last updated
- 2024-03-07
- Certified
- 2024-03-07
Frequently asked questions
- What is Mark Sullivan LLC's NPI number?
- Mark Sullivan LLC's National Provider Identifier (NPI) is 1710470711, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark Sullivan LLC?
- Mark Sullivan LLC is classified in the NPPES registry as Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Sullivan LLC located?
- Mark Sullivan LLC's practice location on file with NPPES is 8703 Milford Ave, Silver Spring, MD 20910-5030.
- What is Mark Sullivan LLC's phone number?
- The practice phone number listed in the NPPES registry for Mark Sullivan LLC is (202) 264-0070.
- Does Mark Sullivan LLC accept Medicare?
- Mark Sullivan LLC is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mark Sullivan LLC?
- The authorized official listed on Mark Sullivan LLC's NPPES record is Mark Sullivan, Clinical Social Worker. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark Sullivan LLC's NPI active?
- Yes — Mark Sullivan LLC's NPI (1710470711) is active in the NPPES registry as of the last update on 2024-03-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.