MARK SULLIVAN LLC
NPI 1710470711
Social Worker - Clinical in Silver Spring, MD
About Mark Sullivan Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK SULLIVAN LLC (NPI 1710470711) is a healthcare organization registered as a clinical in Silver Spring, Maryland and active in the NPI registry since June 2018. The organization lists Mark J Sullivan, Clinical Social Worker, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mark Sullivan Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Mark Sullivan LLC, which bills Medicare for the services this clinician delivers.
Clinician (1)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mark Sullivan LLC's NPI number?
The NPI number for Mark Sullivan LLC is 1710470711. It was assigned to this organization in the NPPES registry on June 13, 2018.
Where is Mark Sullivan LLC located?
Mark Sullivan LLC is located at 8703 Milford Ave, Silver Spring, MD 20910. The listed phone number is (202) 264-0070.
What is Mark Sullivan LLC's specialty?
The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.
Is Mark Sullivan LLC enrolled in Medicare?
Yes. Mark Sullivan LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mark Sullivan LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Clinical Social Worker) reassigns their Medicare billing to Mark Sullivan LLC. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Mark Sullivan LLC was last updated on March 7, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.