John Zerfing, CRNP
NPI 1992303895 · Adult Health Nurse Practitioner · York, PA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Zerfing, CRNP is a Adult Health Nurse Practitioner provider in York, PA (NPI 1992303895).
Provider details
- NPI number
- 1992303895
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNP
- Sex
- Male
- Sole proprietor
- No
- License
- SP022606 (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 tenure25% of score
5 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
47 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 32 | $60 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 15 | $91 |
Typical Medicare-allowed amounts for these services range $60–$91 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote 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 · 23 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lenalidomide | 78 | 15 |
| Prednisone | 46 | 20 |
| Oxycodone Hcl | 42 | 24 |
| Hydroxyurea | 41 | 17 |
| Tramadol Hcl | 35 | 25 |
| Lenalidomidebrand: Revlimid | 31 | — |
| Lorazepam | 29 | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$170 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-10-13
- Last updated
- 2026-04-29
- Certified
- 2026-04-29
Frequently asked questions
- What is John Zerfing's NPI number?
- John Zerfing's National Provider Identifier (NPI) is 1992303895, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Zerfing's specialty?
- John Zerfing is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is John Zerfing located?
- John Zerfing's practice location on file with NPPES is 25 Monument Rd Ste 294, York, PA 17403-5049.
- What is John Zerfing's phone number?
- The practice phone number listed in the NPPES registry for John Zerfing is (717) 741-9229.
- Does John Zerfing accept Medicare?
- John Zerfing is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Zerfing's NPI active?
- Yes — John Zerfing's NPI (1992303895) is active in the NPPES registry as of the last update on 2026-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.