Quick answers
- Where does David A. Sayles see patients?
- Medicare's clinician data lists 12 practice locations, including Herndon, VA, Reston, VA and Gainesville, VA. Call before your visit to confirm the address.
- What is David A. Sayles's specialty?
- Medicare lists Psychiatry as the primary specialty, and also Geriatric Psychiatry.
- Does David A. Sayles accept Medicare assignment?
- Yes. Medicare's clinician data says David A. Sayles accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- Does David A. Sayles offer telehealth?
- Medicare's clinician data says David A. Sayles offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for David A. Sayles?
- (703) 421-0690, as listed in official Medicare / NPI Registry data.
- What is David A. Sayles's NPI number?
- 1124047337. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where David A. Sayles is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 12; the Medicare profile lists all.
- 1121 Reston AveHerndon, VA 20170 (703) 421‑0690
- 12052 N Shore Dr, Talls Oaks Assisted LivingReston, VA 20190 (703) 834‑9800
- 14935 Holly Knoll LnGainesville, VA 20155 (703) 743‑3999
- 1778 Fountain DrReston, VA 20190 (703) 956‑8930
- 3710 Lee HwyArlington, VA 22207 (703) 243‑7640
Group practices
Medicare enrollment lists David A. Sayles as a member of this group (CMS data updated 2026-10-02).
- David a Sayles MD PLLC2 clinicians in the group
Specialties
- Psychiatryprimary
- Geriatric Psychiatryalso
Other psychiatrists in Virginia
Clinicians with the same Medicare primary specialty in Virginia — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loyola University Of Chicago, Stritch School Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1124047337 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians