WILLIAM D GAILLARD
NPI 1295754869
Psychiatry & Neurology - Psychiatry in Washington, DC
About William D Gaillard NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM D GAILLARD (NPI 1295754869) is an individual psychiatry provider in Washington, District Of Columbia, licensed in Virginia (0101053185) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Falls Church, and is a graduate of Yale University School Of Medicine (1985).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted 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
William D Gaillard 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.
Medicare Billing Reassignments
2Medicare enrollment records show William Gaillard reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia enrollment
- 1,417 clinicians in this Medicare group
Falls Church, VA 22042
- Reassigned Medicare billing, District of Columbia enrollment
- 2,618 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20007 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
WASHINGTON, DC 20007
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 William Gaillard's NPI number?
The NPI number for William Gaillard is 1295754869. It was assigned to this individual provider in the NPPES registry on July 18, 2006.
Where is William Gaillard located?
William Gaillard practices at 3800 Reservoir Rd NW, Washington, DC 20007. The listed phone number is (202) 444-8525.
What is William Gaillard's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is William Gaillard enrolled in Medicare?
Yes. William Gaillard 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 organizations bill Medicare for William Gaillard's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Gaillard reassigns Medicare benefits to 2 organizations: Children's Hospital (Washington, DC) and Inova Health Care Services (Falls Church, VA). Each 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 William Gaillard's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Gaillard accept?
Health plans from Oscar Health list William Gaillard 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 William Gaillard was last updated on July 19, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# William D Gaillard · NPI 1295754869
Psychiatry physician in Washington, District of Columbia. Individual provider, active in the CMS NPPES registry since July 18, 2006.
## Identity
- **NPI:** 1295754869 (Entity type: Individual)
- **Enumerated:** July 18, 2006
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** 0101053185 (Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 3800 RESERVOIR RD NW, Washington, DC 20007-2113
- **Phone:** (202) 444-8525
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Children's Hospital (NPI 1780800128, Washington, DC); Inova Health Care Services (NPI 1952320061, Falls Church, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Yale University School Of Medicine, class of 1985
## Record status
- **NPPES last updated:** July 19, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1295754869) · Data from the CMS NPPES public registry.