Quick answers
- Does Marlon R. Maragh accept Medicare assignment?
- Yes. Medicare's clinician data says Marlon R. Maragh 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 Marlon R. Maragh see?
- In 2024, CMS data shows 24 Original Medicare patients and 72 services for Marlon R. Maragh. This counts Original Medicare only and measures volume, not quality.
- What is Marlon R. Maragh's NPI number?
- 1932119690. 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 Marlon R. Maragh, 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 | 24 |
|---|---|
| Services billed to Medicare | 72 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Ultrasound study of arm or leg veins with compression and maneuvers (93970)16 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)16 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 cholesterol50%
- Arthritis50%
Practice locations
Addresses where Marlon R. Maragh is enrolled with Medicare (CMS data updated October 2, 2026).
- 14995 Shady Grove Rd, Suite 150Rockville, MD 20850 (239) 465‑4916
- 419 Holiday Ct, Suite 10Warrenton, VA 20186 (540) 878‑5781
- 45155 Research Pl, Suite 140Ashburn, VA 20147 (703) 858‑0500
Group practices
Medicare enrollment lists Marlon R. Maragh as a member of these groups (CMS data updated October 2, 2026).
- Advanced Dermatology of Maryland PC44 clinicians in the group
- Advanced Dermatology of Virginia Inc27 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Rockville
Clinicians with the same Medicare primary specialty in Rockville, MD — not a recommendation.
Other clinicians in Advanced Dermatology of Maryland PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Yale University School Of Medicine |
| Graduation year | 2000 (26 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932119690 |
| 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