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DR. WILLIAM C MASON MD
NPI 1083654917
Radiology - Diagnostic Radiology in Seneca, PA

Active since June 08, 2006PECOS EnrolledAccepts Medicare Assignment
79.55/100
CMS Quality Rating
100 FAIRFIELD DR, SENECA, PA 16346(814) 676-7130(814) 676-7950 Get Directions Write a Review

NPPES record last updated: August 19, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. William C Mason Md NPPES

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

DR. WILLIAM C MASON MD (NPI 1083654917) is an individual diagnostic radiology provider in Seneca, Pennsylvania, licensed in Pennsylvania (MD463059) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, is affiliated with Upmc Northwest, and is a graduate of Rush Medical College Of Rush University (1979).

NPPES Registry Identity

NPI1083654917
Entity TypeIndividualMale
Primary Taxonomy2085R0202X
Provider Legal NameDR. WILLIAM C MASONCredential: MD
Location Address100 FAIRFIELD DRSeneca, PA 16346-2130
Mailing Address100 Fairfield DrSeneca, PA 16346-2130 · (814) 676-7130 · Fax (814) 676-7950
Phone(814) 676-7130
Fax(814) 676-7950
Sole ProprietorNo
Medical School CMSRush Medical College Of Rush UniversityGraduated 1979
Enumeration DateJune 8, 2006
Last NPPES UpdateAugust 19, 2025
NPPES CertifiedAugust 19, 2025
✔ NPI 1083654917 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085R0202X
Licenses✔ Licensed in PA · MD463059✔ Licensed in IN · 01036336A
Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

100 FAIRFIELD DR, Seneca, PA 16346
Open in Google Maps ↗

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William C Mason 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.

PECOS PAC ID6507847027
PECOS Enrollment IDI20180925000839
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.

Areas of Expertise CMS Part B claims 8

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.

Screening 3d breast mammography 77063
Screening 3D breast mammography is a procedure that uses low-dose X-rays to create detailed images of the breast. This allows for early detection of any unusual changes or growths. It's a non-invasive, outpatient procedure that typically takes about 30 minutes.
215 services215 patients
Screening mammography 77067
Screening mammography is a preventative measure that uses low-dose X-rays to take images of the chest area. It's a key tool in early detection of abnormalities, helping to identify issues before they become symptomatic. It is recommended annually for certain age groups.
215 services215 patients
Screening 3d breast mammography 77063
Screening 3D breast mammography is a procedure that uses low-dose X-rays to create detailed images of the breast. This allows for early detection of any unusual changes or growths. It's a non-invasive, outpatient procedure that typically takes about 30 minutes.
115 services115 patients
Screening mammography 77067
Screening mammography is a preventative measure that uses low-dose X-rays to take images of the chest area. It's a key tool in early detection of abnormalities, helping to identify issues before they become symptomatic. It is recommended annually for certain age groups.
115 services115 patients
Diagnostic digital breast tomosynthesis, unilateral or bilateral (list separately in addition to 77065 or 77066) G0279
Diagnostic digital breast tomosynthesis is a 3D imaging test that allows doctors to examine your breast tissue layer by layer. It's performed on one or both sides. It helps in detecting abnormalities more accurately. It's often done in addition to other tests.
78 services78 patients
Limited ultrasound scan of 1 breast 76642
A limited ultrasound scan of one breast is a non-invasive imaging test. It uses sound waves to create pictures of the inside of your breast. It helps identify any unusual growths or changes. It's safe, quick, and typically painless.
45 services44 patients

Hospital Affiliations CMS Care Compare

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

Upmc Northwest

Acute Care Hospitals · Seneca, PA
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number390091
Location100 Fairfield DriveSeneca, PA 16346 · Venango County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 16346 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$84.88 typical visit price
range $54.64 – $166.87
Typical copayment $21.22 (range $13.66 – $41.71)
Most-billed visit code 99203
Established Patient
$68.36 typical visit price
range $17.33 – $135.84
Typical copayment $17.09 (range $4.33 – $33.96)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

79.55/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality64.36
Promoting Interoperability100
Improvement Activities40
Cost67.48

Reported Quality Measures

Radiation Consideration for Adult CT: Utilization of Dose Lowering Techniques
Percentage of final reports for patients aged 18 years and older undergoing CT with documentation that one or more of the following dose reduction techniques were used: - Automated exposure control - Adjustment of the mA and/or kV according to patient size -…
100%408 patients
Radiology: Reminder System for Screening Mammograms
Percentage of patients undergoing a screening mammogram whose information is entered into a reminder system with a target due date for the next mammogram
100%119 patients
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

PAMELA SUE REID
Occupational Therapy Assistant
100 FAIRFIELD DR
SENECA, PA 16346
Venango County (814) 678-4662
JULIA ANN SIMPSON PTA
Physical Therapy Assistant
100 FAIRFIELD DR
SENECA, PA 16346
Venango County (814) 676-7932
UPMC NORTHWEST
Psychiatric Unit
100 FAIRFIELD DR
SENECA, PA 16346
Venango County (814) 676-7600
MICHELLE WRIGHT
Obstetrics & Gynecology
100 FAIRFIELD DR
SENECA, PA 16346
Venango County (814) 676-7845
ALI GIRT
Registered Nurse
100 FAIRFIELD DR
SENECA, PA 16346
Venango County (814) 676-7600
NARENDRA BHAGWANDIEN
Internal Medicine
100 FAIRFIELD DR
SENECA, PA 16346
Venango County (814) 676-7932
CYNTHIA MICHELLE COMISKE M.P.T., W.C.C.
Physical Therapist
100 FAIRFIELD DR
SENECA, PA 16346
Venango County (814) 676-7932
MARY JEAN MCCAULEY
Physical Therapy Assistant
100 FAIRFIELD DR
SENECA, PA 16346
Venango County (814) 676-7600

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 Mason's NPI number?

The NPI number for William Mason is 1083654917. It was assigned to this individual provider in the NPPES registry on June 8, 2006.

Where is William Mason located?

William Mason practices at 100 Fairfield Dr, Seneca, PA 16346. The listed phone number is (814) 676-7130.

What is William Mason's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is William Mason enrolled in Medicare?

Yes. William Mason 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.

Is William Mason affiliated with any hospitals?

According to CMS data, William Mason is affiliated with Upmc Northwest.

When was this NPI record last updated?

The NPPES record for William Mason was last updated on August 19, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.