WILLIAM J. HENNESSEY M.D.
NPI 1477589778
Physical Medicine & Rehabilitation in Greensburg, PA

Active since June 25, 2006PECOS Enrolled
120 VILLAGE DR, GREENSBURG, PA 15601(724) 836-7590(724) 836-7570 Get Directions Write a Review

NPPES record last updated: October 2, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About William J. Hennessey M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM J. HENNESSEY M.D. (NPI 1477589778) is an individual physical medicine & rehabilitation provider in Greensburg, Pennsylvania, licensed in Pennsylvania (MD059682L) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1477589778
Entity TypeIndividualMale
Primary Taxonomy208100000X
Provider Legal NameWILLIAM J. HENNESSEYCredential: M.D.
Location Address120 VILLAGE DRGreensburg, PA 15601-3707
Mailing Address120 Village DrGreensburg, PA 15601-3707 · (724) 836-7590 · Fax (724) 836-7570
Fax(724) 836-7570
Sole ProprietorNo
Enumeration DateJune 25, 2006
Last NPPES UpdateOctober 2, 2013
✔ NPI 1477589778 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysical Medicine & RehabilitationAllopathic & Osteopathic Physicians
Taxonomy Code208100000X
License✔ Licensed in PA · MD059682L
Definition
Physical medicine and rehabilitation, also referred to as rehabilitation medicine, is the medical specialty concerned with diagnosing, evaluating, and treating patients with physical disabilities. These disabilities may arise from conditions affecting the musculoskeletal system such as neck and back pain, sports injuries, or other painful conditions affecting the limbs, such as carpal tunnel syndrome. Alternatively, the disabilities may result from neurological trauma or disease such as spinal cord injury, head injury or stroke. A physician certified in physical medicine and rehabilitation is often called a physiatrist. The primary goal of the physiatrist is to achieve maximal restoration of physical, psychological, social and vocational function through comprehensive rehabilitation. Pain management is often an important part of the role of the physiatrist. For diagnosis and evaluation, a physiatrist may include the techniques of electromyography to supplement the standard history, physical, x-ray and laboratory examinations. The physiatrist has expertise in the appropriate use of therapeutic exercise, prosthetics (artificial limbs), orthotics and mechanical and electrical devices.
120 VILLAGE DR, Greensburg, PA 15601

Other Identifiers 3

Medicare UPINF93270PA
Medicare ID-Type UnspecifiedHE284184PA
Medicaid01641780PA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

William J. Hennessey M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show William Hennessey reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Physical Medicine & Rehabilitation
120 VILLAGE DR
Greensburg, PA 15601
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 2 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.

Other Providers at the Same Location NPPES 6

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Physician Assistant
120 VILLAGE DR
GREENSBURG, PA 15601
Family Medicine
120 VILLAGE DR
GREENSBURG, PA 15601
Physical Medicine & Rehabilitation
120 VILLAGE DR
GREENSBURG, PA 15601
Pain Medicine (Pain Medicine)
120 VILLAGE DR
GREENSBURG, PA 15601
Physical Medicine & Rehabilitation
120 VILLAGE DR
GREENSBURG, PA 15601
Family Medicine (Adult Medicine)
120 VILLAGE DR
GREENSBURG, PA 15601

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 Hennessey's NPI number?

The NPI number for William Hennessey is 1477589778. It was assigned to this individual provider in the NPPES registry on June 25, 2006.

Where is William Hennessey located?

William Hennessey practices at 120 Village Dr, Greensburg, PA 15601. The listed phone number is (724) 836-7590.

What is William Hennessey's specialty?

The primary specialty registered for this NPI is Physical Medicine & Rehabilitation with taxonomy code 208100000X.

Is William Hennessey enrolled in Medicare?

Yes. William Hennessey is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for William Hennessey's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Hennessey reassigns Medicare benefits to Pennsylvania Physical Medicine Inc (Greensburg, PA). The 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 Hennessey's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Hennessey was last updated on October 2, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years 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.