DR. WILLIAM HARRY HARTZ M.D.
NPI 1194721803
Radiology - Vascular & Interventional Radiology in Newark, DE
About Dr. William Harry Hartz M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM HARRY HARTZ M.D. (NPI 1194721803) is an individual vascular & interventional radiology provider in Newark, Delaware, licensed in Ohio (35.132810) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS, is affiliated with Tampa General Hospital Brooksville, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. William Harry Hartz M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
33Medicare enrollment records show William Hartz reassigns Medicare billing to 33 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Elkton, MD 21921
- Reassigned Medicare billing, Maryland and Pennsylvania enrollments
- Also billed through NPI 1124067848 (Pennsylvania)
- 512 clinicians in this Medicare group
Bryn Mawr, PA 19010
- Reassigned Medicare billing, Pennsylvania enrollment
- 85 clinicians in this Medicare group
Philadelphia, PA 19128
- Reassigned Medicare billing, Pennsylvania enrollment
- 7 clinicians in this Medicare group
Philadelphia, PA 19120
- Reassigned Medicare billing, Pennsylvania enrollment
- 360 clinicians in this Medicare group
Abington, PA 19001
- Reassigned Medicare billing, Pennsylvania enrollment
- 65 clinicians in this Medicare group
Philadelphia, PA 19115
- Reassigned Medicare billing, Pennsylvania enrollment
- 91 clinicians in this Medicare group
Hamilton, NJ 08691
- Reassigned Medicare billing, Pennsylvania enrollment
- 77 clinicians in this Medicare group
Woodmere, NY 11598
- Reassigned Medicare billing, New York enrollment
- 944 clinicians in this Medicare group
Melville, NY 11747
- Reassigned Medicare billing, New York enrollment
- 128 clinicians in this Medicare group
West Islip, NY 11795
- Reassigned Medicare billing, New York and Pennsylvania enrollments
- 356 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 53
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.
Tampa General Hospital Brooksville
Acute Care Hospitals · Brooksville, FLUnion Hospital Of Cecil County
Acute Care Hospitals · Elkton, MDSt Francis Hospital - The Heart Center
Acute Care Hospitals · Roslyn, NYGood Samaritan Hospital Medical Center
Acute Care Hospitals · West Islip, NYHoly Redeemer Hospital And Medical Center
Acute Care Hospitals · Meadowbrook, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 19713 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 William Hartz's NPI number?
The NPI number for William Hartz is 1194721803. It was assigned to this individual provider in the NPPES registry on June 27, 2005.
Where is William Hartz located?
William Hartz practices at H-42 Omega Drive, Newark, DE 19713. The listed phone number is (302) 738-1700.
What is William Hartz's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Vascular & Interventional Radiology, with taxonomy code 2085R0204X.
Is William Hartz enrolled in Medicare?
Yes. William Hartz is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for William Hartz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Hartz reassigns Medicare benefits to 33 organizations: Union Hospital Of Cecil County, Inc. (Elkton, MD), Rittenhouse Imaging Center, LLC (Bryn Mawr, PA), Precision Diagnostic Radiology LLC (Philadelphia, PA), Hr Physician Services (Philadelphia, PA), Radiology Group Of Abington PC (Abington, PA) and 28 more organizations, listed in the Medicare section above. 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 William Hartz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Hartz accept?
Health plans from Blue Cross Blue Shield of Arizona, Blue Cross and Blue Shield of Texas, CareSource, Cigna Healthcare and HMO Louisiana and 6 other insurers list William Hartz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is William Hartz affiliated with any hospitals?
According to CMS data, William Hartz is affiliated with Tampa General Hospital Brooksville, Union Hospital Of Cecil County, St Francis Hospital - The Heart Center, Good Samaritan Hospital Medical Center and Holy Redeemer Hospital And Medical Center.
When was this NPI record last updated?
The NPPES record for William Hartz was last updated on September 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 51 days 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. William Harry Hartz, M.D. · NPI 1194721803
Vascular & Interventional Radiology physician in Newark, Delaware. Individual provider, active in the CMS NPPES registry since June 27, 2005.
## Identity
- **NPI:** 1194721803 (Entity type: Individual)
- **Enumerated:** June 27, 2005
- **Primary specialty:** Radiology - Vascular & Interventional Radiology · taxonomy 2085R0204X
- **State license:** 35.132810 (Ohio)
- **Sole proprietor:** No
## Practice location
- **Address:** H-42 OMEGA DRIVE, Newark, DE 19713
- **Phone:** (302) 738-1700 · **Fax:** (302) 738-0100
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 33 organizations under Medicare reassignment (form CMS-855R): Union Hospital Of Cecil County, Inc. (NPI 1407607450, Elkton, MD); Rittenhouse Imaging Center, LLC (NPI 1962458034, Bryn Mawr, PA); Precision Diagnostic Radiology LLC (NPI 1558053181, Philadelphia, PA); Hr Physician Services (NPI 1023250065, Philadelphia, PA); Radiology Group Of Abington PC (NPI 1477541035, Abington, PA); and 28 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1978
## Record status
- **NPPES last updated:** September 2, 2026
- **Other identifiers:** Medicaid 000944944 (PA)
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Source: [NPI Profile](https://npiprofile.com/npi/1194721803) · Data from the CMS NPPES public registry.