SOUND SLEEP LLC
NPI 1639776347
Internal Medicine - Sleep Medicine in Haymarket, VA
About Sound Sleep Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
SOUND SLEEP LLC (NPI 1639776347) is a healthcare organization registered as a sleep medicine in Haymarket, Virginia and active in the NPI registry since October 2020. The organization lists Sharmili Mathur, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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)
Sound Sleep Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
3Medicare enrollment records show 3 clinicians reassign Medicare billing to Sound Sleep LLC, which bills Medicare for the services they deliver. Of these, 1 practice within 10 miles. They are listed nearest first.
Clinicians, nearest first (3)
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 Sound Sleep LLC's NPI number?
The NPI number for Sound Sleep LLC is 1639776347. It was assigned to this organization in the NPPES registry on October 6, 2020.
Where is Sound Sleep LLC located?
Sound Sleep LLC is located at 6626 Muir Dr, Haymarket, VA 20169. The listed phone number is (301) 873-8379.
What is Sound Sleep LLC's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Sleep Medicine, with taxonomy code 207RS0012X.
Is Sound Sleep LLC enrolled in Medicare?
Yes. Sound Sleep LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Sound Sleep LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Sound Sleep LLC, in Nurse Practitioner and Sleep Medicine. 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. Of these, 1 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Sound Sleep LLC was last updated on October 6, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Sound Sleep Llc · NPI 1639776347
Sleep Medicine organization in Haymarket, Virginia. Organization record, active in the CMS NPPES registry since October 6, 2020.
## Identity
- **NPI:** 1639776347 (Entity type: Organization)
- **Enumerated:** October 6, 2020
- **Primary specialty:** Internal Medicine - Sleep Medicine · taxonomy 207RS0012X
- **Organization subpart:** No
- **Authorized official:** Sharmili Mathur, OWNER
## Practice location
- **Address:** 6626 MUIR DR, Haymarket, VA 20169-2742
- **Phone:** (301) 873-8379
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 3 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (2), Sleep Medicine (1); 1 practice within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 6, 2020
- **Other identifiers:** Other 0102202672 (VA)
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Source: [NPI Profile](https://npiprofile.com/npi/1639776347) · Data from the CMS NPPES public registry.