Quick answers
- Does Maria Demario accept Medicare assignment?
- Yes. Medicare's clinician data says Maria Demario 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 Maria Demario see?
- In 2024, CMS data shows 361 Original Medicare patients and 2,742 services for Maria Demario. This counts Original Medicare only and measures volume, not quality.
- What is Maria Demario's NPI number?
- 1891792768. 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 Maria Demario, 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 | 361 |
|---|---|
| Services billed to Medicare | 2,742 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)406 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)292 services
- Administration and interpretation of patient-focused health risk assessment (96160)289 services
- Annual alcohol misuse screening, 5 to 15 minutes (G0442)289 services
- Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)276 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 pressure68%
- Arthritis44%
- Depression39%
- Ischemic heart disease34%
- Osteoporosis32%
Hospitals where Maria Demario works
Medicare's Facility Affiliation Data lists Maria Demario 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.
- Bryn Mawr HospitalBryn Mawr, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390139
- Chester County HospitalWest Chester, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390179
- Hospital of University of PennsylvaniaPhiladelphia, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390111
- Main Line Hospital LankenauWynnewood, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390195
- Riddle Memorial HospitalMedia, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390222
Practice locations
Addresses where Maria Demario is enrolled with Medicare (CMS data updated October 2, 2026).
- 4667 W Chester Pike, Gateway Medical Associates PCNewtown Square, PA 19073 (610) 356‑7870
- 51 Cedar Hill LnMedia, PA 19063 (610) 431‑7929
Group practices
Medicare enrollment lists Maria Demario as a member of this group (CMS data updated October 2, 2026).
- Pentahealth, LLC67 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Newtown Square
Clinicians with the same Medicare primary specialty in Newtown Square, PA — not a recommendation.
Other clinicians in Pentahealth, LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Philadelphia College Of Osteopathic Medicine |
| Graduation year | 1991 (35 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1891792768 |
| 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