Quick answers
- Does Theresa Shafer accept Medicare assignment?
- Yes. Medicare's clinician data says Theresa Shafer 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 Theresa Shafer see?
- In 2024, CMS data shows 135 Original Medicare patients and 333 services for Theresa Shafer. This counts Original Medicare only and measures volume, not quality.
- What is Theresa Shafer's NPI number?
- 1356777353. 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 Theresa Shafer, 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 | 135 |
|---|---|
| Services billed to Medicare | 333 |
| Different services or procedures | 22 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)84 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)65 services
- Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)39 services
- Fusion of additional segment of spine (22614)25 services
- Fusion of spine in lower back (22612)24 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%
- Arthritis75%
- High blood pressure71%
- Ischemic heart disease36%
- Diabetes30%
- Anxiety23%
Hospitals where Theresa Shafer works
Medicare's Facility Affiliation Data lists Theresa Shafer 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
- 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 Theresa Shafer is enrolled with Medicare (CMS data updated October 2, 2026).
- 154 Exton Square MallExton, PA 19341
- 154 Exton Square Mall, Family Medicine at Exton SquareExton, PA 19341 (484) 565‑8500
- 255 W Lancaster AvePaoli, PA 19301
- 830 Old Lancaster RdBryn Mawr, PA 19010
Group practices
Medicare enrollment lists Theresa Shafer as a member of this group (CMS data updated October 2, 2026).
- Main Line Healthcare1,184 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Exton
Clinicians with the same Medicare primary specialty in Exton, PA — not a recommendation.
Other clinicians in Main Line Healthcare
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2013 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1356777353 |
| 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