John Zerfass, PA-C
John Zerfass is a Medical Physician Assistant based in Allentown, PA with over 12 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
John Zerfass, PA-C has practiced medical for 12+ years, working in group practice. He has been practicing since 2014 — over 12 years. CMS Medicare data shows his patients commonly have high cholesterol, hypertension, and arthritis.
At a glance
- Prescribes opioids less than 24% of reporting doctors in Pennsylvania
- Uses generic medications more than 57% of reporting doctors in Pennsylvania
- Virtual visits available — no app or travel required
Older · 4269dNPPES updated 2014-09-15 · verify NPI on CMS · Verify license at Pennsylvania State Board of Medicine
Contact & Location
Practice Location
1250 S Cedar Crest Blvd Suite 400, Allentown, PA 18103-6224
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
Opioid Rx
↓ Lower = better2.88%
Pennsylvania avg: 4.3 · US avg: 5.1
✓ Higher than most doctors nationally(-2.2 pts)
2.88% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better89.1%
Pennsylvania avg: 82.8 · US avg: 82.8
✓ Higher than most doctors nationally(+6.3 pts)
Typical range among reporting doctors in PennsylvaniaHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
132
Unique beneficiaries
Standard volumePrescription Recipients
209
Patients prescribed
Prescriptions Written
973
Total claims
Total Medicare drug cost: $87k
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 High Cholesterol, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↓ Fewer patients than average (-1%) — less common here
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-3%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%Conditions affecting emotional state, including depression and bipolar disorder
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%↓ Fewer patients than average (-2%) — less common here
Excessive worry or fear that interferes with daily life
US avg: 34.1%↓ Fewer patients than average (-4%) — less common here
Reduced blood flow to the heart muscle, commonly known as coronary artery disease
US avg: 31.7%↓ Fewer patients than average (-11%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
Social Vulnerability Index: 0.46 / 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.
Patient Reviews
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
12 years in practice
Established
Definition to come...
Taxonomy: 363AM0700X
Mailing address
2100 Mack Blvd 2nd Fl, Allentown, PA 18103-5622
Differs from practice location
Virtual Medical Care With John Zerfass
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with John Zerfass for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to Allentown 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 John Zerfass
Dr. Zerfass is listed as active in the NPI registry with telehealth listed in Allentown, PA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (610) 402-6555.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Physician Comparator · HRSA HPSA · CDC SVI. See Data Methodology.
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Contact John Zerfass
Practice Location
1250 S Cedar Crest Blvd Suite 400, Allentown, PA 18103-6224
Mailing Address
2100 Mack Blvd 2nd Fl, Allentown, PA 18103-5622
This is a provider directory. Contact the office directly to schedule appointments.
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