Quick answers
- Does Adam J. Mariotti accept Medicare assignment?
- Yes. Medicare's clinician data says Adam J. Mariotti 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 Adam J. Mariotti see?
- In 2024, CMS data shows 851 Original Medicare patients and 4,590 services for Adam J. Mariotti. This counts Original Medicare only and measures volume, not quality.
- What is Adam J. Mariotti's NPI number?
- 1184884298. 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 Adam J. Mariotti, 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 | 851 |
|---|---|
| Services billed to Medicare | 4,590 |
| Different services or procedures | 63 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,244 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)526 services
- Professional service for preparation and provision of 1 or more antigens (95165)473 services
- Removal of impacted ear wax (69210)414 services
- Diagnostic exam of nasal passages using an endoscope (31231)323 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 cholesterol75%
- High blood pressure73%
- Arthritis50%
- Ischemic heart disease29%
- Anxiety26%
- Diabetes24%
Hospitals where Adam J. Mariotti works
Medicare's Facility Affiliation Data lists Adam J. Mariotti at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Chester County HospitalWest Chester, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390179
- Paoli HospitalPaoli, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390153
- Riddle Memorial HospitalMedia, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390222
Practice locations
Addresses where Adam J. Mariotti is enrolled with Medicare (CMS data updated October 2, 2026).
- 111 Arrandale BlvdExton, PA 19341 (610) 363‑2532
- 200 Willowbrook Ln, Suite 240West Chester, PA 19382 (610) 363‑2532
Group practices
Medicare enrollment lists Adam J. Mariotti as a member of this group (CMS data updated October 2, 2026).
- Ear Nose and Throat Associates of Chester County16 clinicians in the group
Specialties
- Otolaryngologyprimary
- Allergy/Immunologyalso
Other ENT doctors in Exton
Clinicians with the same Medicare primary specialty in Exton, PA — not a recommendation.
Other clinicians in Ear Nose and Throat Associates of Chester County
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Medical school | Jefferson Medical College Of Thomas Jefferson University |
|---|---|
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1184884298 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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