DR. MATTHEW ANTHONY DIAMOND MD
NPI 1770044778
Internal Medicine - Medical Oncology in Newark, DE
About Dr. Matthew Anthony Diamond Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MATTHEW ANTHONY DIAMOND MD (NPI 1770044778) is an individual medical oncology provider in Newark, Delaware, licensed in Pennsylvania (MD491702) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with St Luke's Warren Hospital, and maintains a secondary practice location in Easton.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Matthew Anthony Diamond Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Matthew Diamond reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Newark, DE 19713
- Reassigned Medicare billing, Delaware enrollment
- 460 clinicians in this Medicare group
Harleysville, PA 19438
- Reassigned Medicare billing, Pennsylvania enrollment
- Medicare enrollment name: St Lukes Physician Group Inc
- 2,851 clinicians in this Medicare group
New Hyde Park, NY 11040
- Reassigned Medicare billing, New York enrollment
- 9,353 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
St Luke's Warren Hospital
Acute Care Hospitals · Phillipsburg, NJSt Luke's Hospital Bethlehem
Acute Care Hospitals · Bethlehem, PASt Luke's Miners Memorial Hospital
Acute Care Hospitals · Coaldale, PASt Luke's Hospital - Monroe Campus
Acute Care Hospitals · Stroudsburg, PASt Luke's Hospital - Carbon Campus
Acute Care Hospitals · Lehighton, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19718 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NEWARK, DE 19718
NEWARK, DE 19718
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Matthew Diamond's NPI number?
The NPI number for Matthew Diamond is 1770044778. It was assigned to this individual provider in the NPPES registry on March 31, 2019.
Where is Matthew Diamond located?
Matthew Diamond practices at 4755 Ogletown Stanton Road Suite 5a43, Newark, DE 19718. The listed phone number is (302) 623-0188.
What is Matthew Diamond's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Matthew Diamond enrolled in Medicare?
Yes. Matthew Diamond is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Matthew Diamond's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Diamond reassigns Medicare benefits to 3 organizations: Christiana Care Health Services Inc (Newark, DE), St Luke's Physician Group Inc (Harleysville, PA) and North Shore - Lij Medical PC (New Hyde Park, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Matthew Diamond's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Matthew Diamond affiliated with any hospitals?
According to CMS data, Matthew Diamond is affiliated with St Luke's Warren Hospital, St Luke's Hospital Bethlehem, St Luke's Miners Memorial Hospital, St Luke's Hospital - Monroe Campus and St Luke's Hospital - Carbon Campus.
When was this NPI record last updated?
The NPPES record for Matthew Diamond was last updated on January 21, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Matthew Anthony Diamond, MD · NPI 1770044778
Medical Oncology physician in Newark, Delaware. Individual provider, active in the CMS NPPES registry since March 31, 2019.
## Identity
- **NPI:** 1770044778 (Entity type: Individual)
- **Enumerated:** March 31, 2019
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** MD491702 (Pennsylvania)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4755 OGLETOWN STANTON ROAD, SUITE 5A43, Newark, DE 19718-2200
- **Phone:** (302) 623-0188 · **Fax:** (302) 733-5640
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Christiana Care Health Services Inc (NPI 1245474329, Newark, DE); St Luke's Physician Group Inc (NPI 1184518581, Harleysville, PA); North Shore - Lij Medical PC (NPI 1790043479, New Hyde Park, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** January 21, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1770044778) · Data from the CMS NPPES public registry.