Quick answers
- Does Summer Herlihy accept Medicare assignment?
- Yes. Medicare's clinician data says Summer Herlihy accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Summer Herlihy see?
- In 2024, CMS data shows 82 Original Medicare patients and 1,850 services for Summer Herlihy. This counts Original Medicare only and measures volume, not quality.
- What is Summer Herlihy's NPI number?
- 1043458847. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Summer Herlihy, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 82 |
|---|---|
| Services billed to Medicare | 1,850 |
| Different services or procedures | 45 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)1,200 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure72%
- High cholesterol46%
- Arthritis44%
- Diabetes41%
- Chronic kidney disease33%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)23%
Practice locations
Addresses where Summer Herlihy is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 16; the Medicare profile lists all.
- 10810 Connecticut AveKensington, MD 20895 (301) 929‑7100
- 1201 Hospital DrFredericksburg, VA 22401 (540) 368‑3700
- 12201 Plum Orchard DrSilver Spring, MD 20904 (301) 572‑1000
- 1221 Mercantile LnLargo, MD 20774 (301) 618‑5700
- 13285 Minnieville RdWoodbridge, VA 22192 (703) 986‑2400
Group practices
Medicare enrollment lists Summer Herlihy as a member of this group (CMS data updated October 2, 2026).
- Kaiser Foundation Health Plan of the Mid Atlantic States, Inc1,899 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Kensington
Clinicians with the same Medicare primary specialty in Kensington, MD — not a recommendation.
Other clinicians in Kaiser Foundation Health Plan of the Mid Atlantic States, Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Medical school | University Of Virginia School Of Medicine |
|---|---|
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043458847 |
| 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 October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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