Quick answers
- Where does Cassandra Sims see patients?
- Medicare's clinician data lists 3 practice locations, including Largo, MD, Falls Church, VA and Ashburn, VA. Call before your visit to confirm the address.
- What is Cassandra Sims's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Cassandra Sims accept Medicare assignment?
- Yes. Medicare's clinician data says Cassandra Sims 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 Cassandra Sims?
- (301) 618-5700, as listed in official Medicare / NPI Registry data.
- What is Cassandra Sims's NPI number?
- 1790986594. 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 Cassandra Sims is enrolled with Medicare (CMS data updated 2026-10-02).
- 1221 Mercantile LnLargo, MD 20774 (301) 618‑5700
- 201 N Washington StFalls Church, VA 22046 (703) 237‑4000
- 43480 Yukon Dr, Suite 100Ashburn, VA 20147 (571) 252‑6000
Group practices
Medicare enrollment lists Cassandra Sims as a member of this group (CMS data updated 2026-10-02).
- Kaiser Foundation Health Plan of the Mid Atlantic States, Inc1,899 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Largo
Clinicians with the same Medicare primary specialty in Largo, MD — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 2006 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790986594 |
| 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