Quick answers
- Where does Derwin Harris see patients?
- Medicare's clinician data lists 4 practice locations, including Columbia, MD, Rockville, MD and Aldie, VA. Call before your visit to confirm the address.
- What is Derwin Harris's specialty?
- Medicare lists Clinical Social Worker as the primary specialty.
- Does Derwin Harris accept Medicare assignment?
- Yes. Medicare's clinician data says Derwin Harris 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 Derwin Harris offer telehealth?
- Medicare's clinician data says Derwin Harris offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Derwin Harris?
- (571) 977-6870, as listed in official Medicare / NPI Registry data.
- What is Derwin Harris's NPI number?
- 1952403115. 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 Derwin Harris is enrolled with Medicare (CMS data updated 2026-10-02).
- 10400 Little Patuxent PkwyColumbia, MD 21044 (571) 977‑6870
- 11921 Rockville Pike, Suite 402Rockville, MD 20852 (425) 658‑2254
- 24560 Southpoint Dr, Suite 260Aldie, VA 20105 (571) 248‑7493
- 2501 N Glebe Rd, Suite 303Arlington, VA 22207 (703) 841‑1290
Group practices
Medicare enrollment lists Derwin Harris as a member of this group (CMS data updated 2026-10-02).
- Columbia Associates in Psychiatry PC149 clinicians in the group
Specialties
- Clinical Social Workerprimary
Other clinical social workers in Columbia
Clinicians with the same Medicare primary specialty in Columbia, MD — not a recommendation.
Clinician information
| Credential | CSW |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1952403115 |
| 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