THE GARRETT COUNTY SLEEP CENTER
NPI 1518467323
Clinic/Center - Sleep Disorder Diagnostic in Oakland, MD

Q: What is The Garrett County Sleep Center's NPI number?

The NPI number for The Garrett County Sleep Center is 1518467323. It was assigned to this organization in the NPPES registry on February 19, 2018.

Q: What is The Garrett County Sleep Center's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Sleep Disorder Diagnostic, with taxonomy code 261QS1200X.

Active since February 19, 2018

13145 GARRETT HWY, OAKLAND, MD 21550(301) 334-8600(866) 235-7361 Get Directions Write a Review

NPPES record last updated: December 2, 2025. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Dec 2, 2025, May 15, 2025, Feb 19, 2018 (3 updates tracked since 2018).

On this page

About The Garrett County Sleep Center NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

THE GARRETT COUNTY SLEEP CENTER (NPI 1518467323) is a healthcare organization registered as a sleep disorder diagnostic in Oakland, Maryland and active in the NPI registry since February 2018. The organization maintains a secondary practice location in Friendsville and lists Angel Williams, Office Manager, as its authorized official.

NPPES Registry Identity

NPI1518467323

Entity TypeOrganization

Primary Taxonomy261QS1200X

Legal Business NameTHE GARRETT COUNTY SLEEP CENTER

Location Address13145 GARRETT HWYOakland, MD 21550-1164

Mailing Address13145 Garrett HwyOakland, MD 21550-1164 · (301) 334-8600 · Fax (866) 235-7361

Phone(301) 334-8600

Fax(866) 235-7361

Organization SubpartNo

Authorized OfficialAngel WilliamsOffice Manager · (301) 334-8600

Enumeration DateFebruary 19, 2018

Last NPPES UpdateDecember 2, 20253 updates tracked since enumeration

NPPES CertifiedDecember 2, 2025

✔ NPI 1518467323 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Sleep Disorder DiagnosticAmbulatory Health Care Facilities

Taxonomy Code261QS1200X

13145 GARRETT HWY, Oakland, MD 21550

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Secondary Practice Location 1

Location 1253 Maple StFriendsville, MD 21531-2131 · Phone (301) 334-8600 · Fax (301) 576-5510

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

The Garrett County Sleep Center is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 3 clinicians reassign Medicare billing to The Garrett County Sleep Center, which bills Medicare for the services they deliver. Of these, 1 practice at this address and 2 within 10 miles. They are listed nearest first.

Clinicians, nearest first (3)

Alea Mcclintock-Donahue, CRNP

Nurse Practitioner

NPI 1164860250

13145 GARRETT HWY
Oakland, MD 21550

(301) 334-8600

✔ PECOS✔ Accepts MedicareSame address

Margaret Kaiser, M.D.

Internal Medicine

NPI 1396732129

251 N 4TH ST
Oakland, MD 21550

(301) 533-4000

✔ PECOS✔ Accepts Medicare1.0 mi

Lisa Shives, M.D.

Internal Medicine

NPI 1740322825

1853 LYNDON RD
San Diego, CA 92103

(619) 944-7532

✔ PECOS✔ Accepts Medicare2,148 mi

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 The Garrett County Sleep Center's NPI number?

The NPI number for The Garrett County Sleep Center is 1518467323. It was assigned to this organization in the NPPES registry on February 19, 2018.

Where is The Garrett County Sleep Center located?

The Garrett County Sleep Center is located at 13145 Garrett Hwy, Oakland, MD 21550. The listed phone number is (301) 334-8600.

What is The Garrett County Sleep Center's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Sleep Disorder Diagnostic, with taxonomy code 261QS1200X.

Is The Garrett County Sleep Center enrolled in Medicare?

Yes. The Garrett County Sleep Center is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through The Garrett County Sleep Center?

According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to The Garrett County Sleep Center, in Internal Medicine and Nurse Practitioner. 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 at this address and 2 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 The Garrett County Sleep Center was last updated on December 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.