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MR. VASILIOS A GACIS NCC, LMFT, LPC
NPI 1265548051
Marriage & Family Therapist in Herndon, VA

Active since August 22, 2006PECOS EnrolledAccepts Medicare Assignment
433A CARLISLE DR, HERNDON, VA 20170(703) 481-6001 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mr. Vasilios A Gacis Ncc, Lmft, Lpc NPPES

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

MR. VASILIOS A GACIS NCC, LMFT, LPC (NPI 1265548051) is an individual marriage & family therapist in Herndon, Virginia, licensed in Virginia (0717001059) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1981).

NPPES Registry Identity

NPI1265548051
Entity TypeIndividualMale
Primary Taxonomy106H00000X
Provider Legal NameMR. VASILIOS A GACISCredential: NCC, LMFT, LPC
Location Address433A CARLISLE DRHerndon, VA 20170-4802
Mailing AddressPo Box 5238Herndon, VA 20172-1916 · (703) 481-6001
Phone(703) 481-6001
Sole ProprietorNo
Medical School CMSOtherGraduated 1981
Enumeration DateAugust 22, 2006
Last NPPES UpdateSeptember 11, 2025
✔ NPI 1265548051 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyMarriage & Family TherapistBehavioral Health & Social Service Providers
Taxonomy Code106H00000X
License✔ Licensed in VA · 0717001059
Definition
A marriage and family therapist is a person with a master's degree in marriage and family therapy, or a master's or doctoral degree in a related mental health field with substantially equivalent coursework in marriage and family therapy, who receives supervised clinical experience, or a person who meets the state requirements to practice as a marriage and family therapist. A marriage and family therapist treats mental and emotional disorders within the context of marriage and family systems. A marriage and family therapist provides mental health and counseling services to individuals, couples, families, and groups.
Also ListedCounselor · ProfessionalTaxonomy 101YP2500X · License 0701003468 (VA)
433A CARLISLE DR, Herndon, VA 20170
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mr. Vasilios A Gacis Ncc, Lmft, Lpc is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4880194612
PECOS Enrollment IDI20250825004063
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency– Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Vasilios Gacis reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Associated Clinical Services
14 mi
Clinical
8348 TRAFORD LN, SUITE 102
Springfield, VA 22152
  • Reassigned Medicare billing, District of Columbia enrollment
  • 15 clinicians in this Medicare group
NPI 1073522124 (703) 569-8731

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 Vasilios Gacis's NPI number?

The NPI number for Vasilios Gacis is 1265548051. It was assigned to this individual provider in the NPPES registry on August 22, 2006.

Where is Vasilios Gacis located?

Vasilios Gacis practices at 433A Carlisle Dr, Herndon, VA 20170. The listed phone number is (703) 481-6001.

What is Vasilios Gacis's specialty?

The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.

Is Vasilios Gacis enrolled in Medicare?

Yes. Vasilios Gacis is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Vasilios Gacis's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Vasilios Gacis reassigns Medicare benefits to Associated Clinical Services (Springfield, VA). The 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 Vasilios Gacis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Vasilios Gacis accept?

Health plans from Oscar Health list Vasilios Gacis as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Vasilios Gacis was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.