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DR. NICHOLAS FREDERICK WILLISON DO
NPI 1174102826
Anesthesiology in Greensburg, PA

Active since April 07, 2021PECOS EnrolledAccepts Medicare Assignment
532 W PITTSBURGH ST, GREENSBURG, PA 15601(724) 832-4000 Get Directions Write a Review

NPPES record last updated: August 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 23, 2021, Apr 7, 2021 (2 updates tracked since 2021).

About Dr. Nicholas Frederick Willison Do NPPES

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

DR. NICHOLAS FREDERICK WILLISON DO (NPI 1174102826) is an individual anesthesiology provider in Greensburg, Pennsylvania, licensed in Pennsylvania (OS024586) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, is affiliated with Magee Womens Hospital Of Upmc Health System, and is a graduate of Lake Erie College Of Osteopathic Medicine, Erie (2021).

NPPES Registry Identity

NPI1174102826
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. NICHOLAS FREDERICK WILLISONCredential: DO
Location Address532 W PITTSBURGH STGreensburg, PA 15601-2239
Mailing Address532 W Pittsburgh StGreensburg, PA 15601-2239 · (724) 832-4000
Phone(724) 832-4000
Sole ProprietorNo
Medical School CMSLake Erie College Of Osteopathic Medicine, ErieGraduated 2021
Enumeration DateApril 7, 2021
Last NPPES UpdateAugust 3, 20252 updates tracked since enumeration
NPPES CertifiedAugust 3, 2025
✔ NPI 1174102826 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in PA · OS024586
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
532 W PITTSBURGH ST, Greensburg, PA 15601
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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. Nicholas Frederick Willison Do 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.

PECOS PAC ID6204235492
PECOS Enrollment IDI20250616000789
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 Nicholas Willison reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Excela Health Physician Practices, Inc.
Same address
Neonatal
532 W PITTSBURGH ST
Greensburg, PA 15601
  • Reassigned Medicare billing, Pennsylvania enrollment
  • 669 clinicians in this Medicare group
NPI 1386016855 (724) 832-4189

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Magee Womens Hospital Of Upmc Health System

Acute Care Hospitals · Pittsburgh, PA
3/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number390114
Location300 Halket StreetPittsburgh, PA 15213 · Allegheny County
Emergency services Birthing friendly

Excela Health - Frick Hospital

Acute Care Hospitals · Mount Pleasant, PA
OwnershipVoluntary non-profit - Other
CMS Certification Number390217
Location508 South Church StreetMount Pleasant, PA 15666 · Westmoreland County
Emergency services

Excela Health Latrobe Hospital

Acute Care Hospitals · Latrobe, PA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number390219
LocationOne Mellon WayLatrobe, PA 15650 · Westmoreland County
Emergency services

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.

WESTMORELAND REGIONAL HOSPITAL
Psychiatric Unit
532 W PITTSBURGH ST
GREENSBURG, PA 15601
Westmoreland County (724) 832-4000
GOWRI ARULANANTHAM MD
Psychiatry & Neurology (Psychiatry)
532 W PITTSBURGH ST
GREENSBURG, PA 15601
Westmoreland County (724) 832-4450
MATTHEW THOMAS BECKMAN CRNP
Nurse Practitioner (Family)
532 W PITTSBURGH ST
GREENSBURG, PA 15601
Westmoreland County (724) 832-4000
WESTMORELAND REGIONAL HOSPITAL
Clinic/Center
532 W PITTSBURGH ST
GREENSBURG, PA 15601
Westmoreland County (724) 832-4000
JORDAN ANNE CULLER CRNP
Nurse Practitioner (Family)
532 W PITTSBURGH ST
GREENSBURG, PA 15601
Westmoreland County (724) 832-4000
ROBERT R WHIPKEY M.D.
Emergency Medicine
532 W PITTSBURGH ST
GREENSBURG, PA 15601
Westmoreland County (724) 832-4626
MS. KRISTINA MARIE KEEFE PA-C
Physician Assistant
532 W PITTSBURGH ST
GREENSBURG, PA 15601
Westmoreland County (724) 832-4000
HALIE FERRENBERG
Physician Assistant
532 W PITTSBURGH ST
GREENSBURG, PA 15601
Westmoreland County (724) 832-4000

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 Nicholas Willison's NPI number?

The NPI number for Nicholas Willison is 1174102826. It was assigned to this individual provider in the NPPES registry on April 7, 2021.

Where is Nicholas Willison located?

Nicholas Willison practices at 532 W Pittsburgh St, Greensburg, PA 15601. The listed phone number is (724) 832-4000.

What is Nicholas Willison's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Nicholas Willison enrolled in Medicare?

Yes. Nicholas Willison 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 organization bills Medicare for Nicholas Willison's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nicholas Willison reassigns Medicare benefits to Excela Health Physician Practices, 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 Nicholas Willison's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Nicholas Willison affiliated with any hospitals?

According to CMS data, Nicholas Willison is affiliated with Magee Womens Hospital Of Upmc Health System, Excela Health - Frick Hospital and Excela Health Latrobe Hospital.

When was this NPI record last updated?

The NPPES record for Nicholas Willison was last updated on August 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.