ALEXANDRIA COMMUNITY SERVICES BOARD
NPI 1447279658
Clinic/Center - Mental Health (Including Community Mental Health Center) in Alexandria, VA

Active since July 19, 2006CLIA 49D1053743 · Waiver
4850 MARK CENTER DR, ALEXANDRIA, VA 22311(703) 746-3400 Get Directions Write a Review

NPPES record last updated: May 20, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 11, 2024, Jul 17, 2023 (2 updates tracked since 2023).

About Alexandria Community Services Board NPPES

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

ALEXANDRIA COMMUNITY SERVICES BOARD (NPI 1447279658) is a healthcare organization registered as a mental health (including community mental health center) in Alexandria, Virginia and active in the NPI registry since July 2006. The organization holds a CLIA Waiver certificate valid through May 2, 2028 and lists Catherine Garvey, Director, as its authorized official.

NPPES Registry Identity

NPI1447279658
Entity TypeOrganization
Primary Taxonomy261QM0801X
Legal Business NameCITY OF ALEXANDRIA
Location Address4850 MARK CENTER DRAlexandria, VA 22311-1882
Mailing Address4850 Mark Center Dr Fl 8Alexandria, VA 22311-1882 · (703) 746-3400
Organization SubpartYes
Authorized OfficialCatherine GarveyDirector · (703) 746-3400
Enumeration DateJuly 19, 2006
Last NPPES UpdateMay 20, 20242 updates tracked since enumeration
NPPES CertifiedMay 20, 2024
✔ NPI 1447279658 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Mental Health (Including Community Mental Health Center)Ambulatory Health Care Facilities
Taxonomy Code261QM0801X
4850 MARK CENTER DR, Alexandria, VA 22311

Other Names 1

Doing Business AsAlexandria Community Services Board

Other Identifiers 3

Medicaid004945026VA
OtherA439VA · Blue Cross Blue Shield
Other18023VA · Anthem Healthkeepers Mco

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alexandria Community Services Board is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

62

Medicare enrollment records show 62 clinicians reassign Medicare billing to Alexandria Community Services Board, which bills Medicare for the services they deliver. Of these, 50 practice at this address and 57 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 5

Clinical Social Worker32
Mental Health Counselor17
Psychiatry7
Clinical Psychologist4
Nurse Practitioner2

Nearest to this location (20)

See all 62
Clinical Social Worker
NPI 1417447293
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOS✔ Accepts MedicareSame address
Clinical Social Worker
NPI 1396924569
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Clinical Social Worker
NPI 1003561069
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Clinical Social Worker
NPI 1104324334
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3489
✔ PECOSSame address
Clinical Social Worker
NPI 1124269584
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Mental Health Counselor
NPI 1295154771
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Clinical Psychologist
NPI 1780943761
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3505
✔ PECOS✔ Accepts MedicareSame address
Mental Health Counselor
NPI 1659304384
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOS✔ Accepts MedicareSame address
Mental Health Counselor
NPI 1598859555
4850 MARK CENTER DR FL 9
Alexandria, VA 22311
(703) 746-3446
✔ PECOS✔ Accepts MedicareSame address
Mental Health Counselor
NPI 1740067586
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOS✔ Accepts MedicareSame address
Psychiatry
NPI 1902874605
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOS✔ Accepts MedicareSame address
Mental Health Counselor
NPI 1063018299
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOS✔ Accepts MedicareSame address
Psychiatry
NPI 1699876292
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOS✔ Accepts MedicareSame address
Psychiatry
NPI 1962571646
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3444
✔ PECOS✔ Accepts MedicareSame address
Clinical Psychologist
NPI 1023866191
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Nurse Practitioner
NPI 1427585413
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Clinical Psychologist
NPI 1275736043
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Clinical Psychologist
NPI 1922196658
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Nurse Practitioner
NPI 1790563914
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOSSame address
Psychiatry
NPI 1841498193
4850 MARK CENTER DR
Alexandria, VA 22311
(703) 746-3400
✔ PECOS✔ Accepts MedicareSame address
See all 62 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 49D1053743

City Of Alexandria Otp · Alexandria, VA
Active · expires May 2, 2028
CLIA Number49D1053743
Laboratory TypeComp. Outpatient Rehab Facility
Certificate Effective DateMay 3, 2026
Certificate Expiration DateMay 2, 2028
Laboratory DirectorAlexandra Partridge
Laboratory Phone(703) 867-2564
Laboratory LocationCity Of Alexandria Otp4850 Mark Center Dr, Alexandria, VA 22311
CLIA data matches this NPI record on: Address Name
This certificate is issued to a laboratory to perform only waived tests.

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 City Of Alexandria's NPI number?

The NPI number for City Of Alexandria is 1447279658. It was assigned to this organization in the NPPES registry on July 19, 2006. The provider is doing business as Alexandria Community Services Board.

Where is City Of Alexandria located?

City Of Alexandria is located at 4850 Mark Center Dr, Alexandria, VA 22311. The listed phone number is (703) 746-3400.

What is City Of Alexandria's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Mental Health (Including Community Mental Health Center), with taxonomy code 261QM0801X.

Is City Of Alexandria enrolled in Medicare?

Yes. City Of Alexandria is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through City Of Alexandria?

According to the CMS Revalidation Reassignment List (October 2026 release), 62 clinicians in 5 Medicare specialties reassign their Medicare billing to City Of Alexandria. 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. The largest specialties are Clinical Social Worker (32), Mental Health Counselor (17) and Psychiatry (7). Of these, 50 practice at this address and 57 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does City Of Alexandria hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 49D1053743) is associated with this NPI, valid through May 2, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for City Of Alexandria was last updated on May 20, 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.