John Zerfass, PA-C
NPI 1184025215 · Medical Physician Assistant · Allentown, PA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Zerfass, PA-C is a Medical Physician Assistant provider in Allentown, PA (NPI 1184025215).
Provider details
- NPI number
- 1184025215
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- MA057152 (PA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
265 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 115 | $103 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 61 | $73 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 43 | $104 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 31 | $11 |
| Transitional Care Management Services for Problem of at Least Moderate Complexity99495 | 15 | $165 |
Typical Medicare-allowed amounts for these services range $11–$165 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 43 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alprazolam | 76 | 21 |
| Atorvastatin Calcium | 69 | 20 |
| Levothyroxine Sodium | 68 | 20 |
| Amlodipine Besylate | 62 | 16 |
| Pantoprazole Sodium | 56 | 17 |
| Rosuvastatin Calcium | 53 | 17 |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-09-08
- Last updated
- 2014-09-15
Frequently asked questions
- What is John Zerfass's NPI number?
- John Zerfass's National Provider Identifier (NPI) is 1184025215, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Zerfass's specialty?
- John Zerfass is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is John Zerfass located?
- John Zerfass's practice location on file with NPPES is 1250 S Cedar Crest Blvd, Allentown, PA 18103-6224.
- What is John Zerfass's phone number?
- The practice phone number listed in the NPPES registry for John Zerfass is (610) 402-6555.
- Does John Zerfass accept Medicare?
- John Zerfass is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Zerfass's NPI active?
- Yes — John Zerfass's NPI (1184025215) is active in the NPPES registry as of the last update on 2014-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.