Quick answers
- Where does Merrill Groff see patients?
- Medicare's clinician data lists 6 practice locations, including Fairfax, VA, Olney, MD and Falls Church, VA. Call before your visit to confirm the address.
- What is Merrill Groff's specialty?
- Medicare lists Clinical Social Worker as the primary specialty.
- Does Merrill Groff accept Medicare assignment?
- Yes. Medicare's clinician data says Merrill Groff 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.
- What is the phone number for Merrill Groff?
- (571) 977-6870, as listed in official Medicare / NPI Registry data.
- What is Merrill Groff's NPI number?
- 1578101358. 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 Merrill Groff is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 10721 Main StFairfax, VA 22030 (571) 977‑6870
- 17904 Georgia Ave, Suite 200Olney, MD 20832 (240) 304‑3327
- 2960 Sleepy Hollow RdFalls Church, VA 22044 (703) 536‑2000
- 6410 Dobbin Rd, Suite FColumbia, MD 21045 (240) 304‑3327
- 7474 Greenway Ctr Dr, Suite 202Greenbelt, MD 20770 (240) 277‑3359
Group practices
Medicare enrollment lists Merrill Groff as a member of these groups (CMS data updated 2026-10-02).
- Columbia Associates in Psychiatry PC149 clinicians in the group
- Families First Counseling and Psychiatry LLC25 clinicians in the group
Specialties
- Clinical Social Workerprimary
Other clinical social workers in Fairfax
Clinicians with the same Medicare primary specialty in Fairfax, VA — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Graduation year | 2018 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578101358 |
| 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