Quick answers
- Does Denise D. Najjar accept Medicare assignment?
- Yes. Medicare's clinician data says Denise D. Najjar 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 Denise D. Najjar see?
- In 2024, CMS data shows 4,508 Original Medicare patients and 11,342 services for Denise D. Najjar. This counts Original Medicare only and measures volume, not quality.
- What is Denise D. Najjar's NPI number?
- 1104911718. 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 Denise D. Najjar, 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 | 4,508 |
|---|---|
| Services billed to Medicare | 11,342 |
| Different services or procedures | 14 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Pathology examination of tissue using a microscope, intermediate complexity (88305)4,209 services
- Cell examination of specimen, selective cellular enhancement technique (88112)2,548 services
- Cell examination of urine, computer-assisted (88121)1,203 services
- Special stained specimen slides to examine tissue including interpretation and report (88313)1,118 services
- Special stained specimen slides to examine tissue, initial procedure (88342)884 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%
- Arthritis43%
- Ischemic heart disease31%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)30%
- Diabetes26%
Practice locations
Addresses where Denise D. Najjar is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 E Lancaster Ave, Suite 252Wynnewood, PA 19096 (610) 896‑7360
- 180 Sheree Blvd, Suite 2900Exton, PA 19341 (484) 229‑7200
- 211 S Gulph Rd, Suite 200 the Prostate CenterKing Of Prussia, PA 19406 (610) 579‑3577
- 2112 Harrisburg Pike, Suite 202Lancaster, PA 17601 (717) 869‑4600
- 815 Sumneytown PikeLansdale, PA 19446 (215) 257‑5071
Group practices
Medicare enrollment lists Denise D. Najjar as a member of these groups (CMS data updated October 2, 2026).
- Regional Gastroenterology Associates of Lancaster, Ltd.244 clinicians in the group
- The Centers for Advanced Urology LLP145 clinicians in the group
Specialties
- Pathologyprimary
Other pathologists in Pennsylvania
Clinicians with the same Medicare primary specialty in Pennsylvania — not a recommendation.
Other clinicians in Regional Gastroenterology Associates of Lancaster, Ltd.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1978 (48 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1104911718 |
| 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