Quick answers
- Where does Jason Grainer see patients?
- Medicare's clinician data lists 1 practice location in Reston, VA. Call before your visit to confirm the address.
- What is Jason Grainer's specialty?
- Medicare lists Clinical Psychologist as the primary specialty.
- Does Jason Grainer accept Medicare assignment?
- Yes. Medicare's clinician data says Jason Grainer 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 Jason Grainer offer telehealth?
- Medicare's clinician data says Jason Grainer offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Jason Grainer?
- (410) 760-9079, as listed in official Medicare / NPI Registry data.
- What is Jason Grainer's NPI number?
- 1124387253. 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 Jason Grainer is enrolled with Medicare (CMS data updated 2026-10-02).
- 1800 Michael Faraday Dr, Suite 201Reston, VA 20190 (410) 760‑9079
Group practices
Medicare enrollment lists Jason Grainer as a member of these groups (CMS data updated 2026-10-02).
- Oasis the Mental Health Center LLC27 clinicians in the group
- Greater Baltimore Counseling Center LLC3 clinicians in the group
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Reston
Clinicians with the same Medicare primary specialty in Reston, VA — not a recommendation.
Clinician information
| Credential | PSY |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1124387253 |
| 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