Quick answers
- Does Erik L. Zeger accept Medicare assignment?
- Yes. Medicare's clinician data says Erik L. Zeger 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 Erik L. Zeger see?
- In 2024, CMS data shows 422 Original Medicare patients and 149,980 services for Erik L. Zeger. This counts Original Medicare only and measures volume, not quality.
- What is Erik L. Zeger's NPI number?
- 1639188659. 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 Erik L. Zeger, 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 | 422 |
|---|---|
| Services billed to Medicare | 149,980 |
| Different services or procedures | 86 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Injection, ferric carboxymaltose, 1 mg (J1439)39,000 services
- Injection, oxaliplatin, 0.5 mg (J9263)21,500 services
- Injection, pembrolizumab, 1 mg (J9271)12,600 services
- Injection, eflapegrastim-xnst, 0.1 mg (J1449)6,336 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)2,794 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 blood pressure75%
- High cholesterol75%
- Arthritis48%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)44%
- Ischemic heart disease42%
- Chronic kidney disease36%
Hospitals where Erik L. Zeger works
Medicare's Facility Affiliation Data lists Erik L. Zeger 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
- 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
- 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 Erik L. Zeger is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 E Lancaster AveWynewood, PA 19096 (610) 645‑2494
- 1203 Langhorne Newtown Rd, Suite 135Langhorne, PA 19047 (215) 750‑5050
Group practices
Medicare enrollment lists Erik L. Zeger as a member of this group (CMS data updated October 2, 2026).
- Alliance Cancer Specialists P.C.43 clinicians in the group
Specialties
- Medical Oncologyprimary
Other oncologists in Pennsylvania
Clinicians with the same Medicare primary specialty in Pennsylvania — not a recommendation.
Other clinicians in Alliance Cancer Specialists P.C.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Hahnemann University College Of Medicine |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639188659 |
| 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