Quick answers
- Does Rebecca M. Calder accept Medicare assignment?
- Yes. Medicare's clinician data says Rebecca M. Calder 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 Rebecca M. Calder see?
- In 2024, CMS data shows 85 Original Medicare patients and 102 services for Rebecca M. Calder. This counts Original Medicare only and measures volume, not quality.
- What is Rebecca M. Calder's NPI number?
- 1881993988. 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 Rebecca M. Calder, 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 | 85 |
|---|---|
| Services billed to Medicare | 102 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 64 |
Most frequent services
- Emergency department visit with moderate level of medical decision making (99284)40 services
- Emergency department visit with low level of medical decision making (99283)23 services
- Emergency department visit with high level of medical decision making (99285)22 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 cholesterol68%
- High blood pressure66%
- Arthritis55%
- Anxiety48%
- Depression35%
- Diabetes29%
Practice locations
Addresses where Rebecca M. Calder is enrolled with Medicare (CMS data updated October 2, 2026).
- 1305 W Chester PikeHavertown, PA 19083 (610) 482‑4949
- 3356 Aramingo AvePhiladelphia, PA 19134 (215) 999‑3356
- 4190 City Ave, Suite 101Philadelphia, PA 19131 (215) 857‑5300
- 599 E Lancaster AveSt Davids, PA 19087 (484) 254‑4984
Group practices
Medicare enrollment lists Rebecca M. Calder as a member of this group (CMS data updated October 2, 2026).
- On Demand Urgent Care Group PC101 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Havertown
Clinicians with the same Medicare primary specialty in Havertown, PA — not a recommendation.
Other clinicians in On Demand Urgent Care Group PC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2010 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1881993988 |
| 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