William J Tester, MD
William J Tester is a Hematology & Oncology specialist based in Philadelphia, PA with over 54 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
With over 54 years in internal medicine, William J Tester, MD is a long-established hematology & oncology specialist in Philadelphia. He graduated from Hahnemann University College of Medicine in 1972 and has 54+ years of clinical experience. He regularly sees Medicare patients with hypertension, high cholesterol, and cancer (per CMS claims data).
Older · 2753dNPPES updated 2018-11-09 · verify NPI on CMS · Verify license at Pennsylvania State Board of Medicine
Contact & Location
Practice Location
925 Chestnut St Ste 320a, Philadelphia, PA 19107
How Does This Doctor Compare?
Opioid Rx
↓ Lower = better7.59%
Pennsylvania avg: 4.3 · US avg: 5.1
⚠ Lower than most doctors nationally(+2.5 pts)
7.59% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Medicare Patients
140
Unique beneficiaries
Standard volumePrescription Recipients
74
Patients prescribed
Prescriptions Written
619
Total claims
Total Medicare drug cost: $2.38M
Percentile rankings compared against 3,764 reporting peers in Pennsylvania.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Cancer.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
Diseases involving abnormal cell growth with potential to spread to other body parts
US avg: 20.8%↑ More patients than average (+54%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-1%) — less common here
Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+9%) — a focus area for this doctor
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↑ More patients than average (+1%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$29 received from industry
1 transaction reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to William J Tester's NPI.
Social Vulnerability Index: 0.32 / 1.00
Below-average vulnerabilityHe practices in a community where the CDC measures social vulnerability across socioeconomic status, household composition, racial/ethnic minority status, and housing/transportation factors. A higher index indicates more residents may face barriers accessing care.
Source: CDC/ATSDR Social Vulnerability Index.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1972
Hahnemann University College of Medicine
54 years in practice
Senior practitioner
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Taxonomy: 207RH0003X
Education & Training
Hahnemann University College of Medicine (Class of 1972)
Mailing address
925 Chestnut St Ste 320a, Philadelphia, PA 19107-4216
Differs from practice location
Virtual Hematology & Oncology Care With William J Tester
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with William J Tester for blood pressure monitoring, cholesterol management, follow-up consultations — no travel to Philadelphia required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about William J Tester
Dr. Tester is listed as active in the NPI registry with telehealth listed in Philadelphia, PA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (215) 955-8874.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator · HRSA HPSA · CDC SVI. See Data Methodology.
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Contact William J Tester
Practice Location
925 Chestnut St Ste 320a, Philadelphia, PA 19107
Mailing Address
925 Chestnut St Ste 320a, Philadelphia, PA 19107-4216
This is a provider directory. Contact the office directly to schedule appointments.
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