Lawrence Zelonis, D.O.
NPI 1427147503 · Family Medicine Physician · Butler, PA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lawrence Zelonis, D.O. is a Family Medicine Physician provider in Butler, PA (NPI 1427147503).
Provider details
- NPI number
- 1427147503
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- OS003959-L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
102 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 102 | $72 |
Typical Medicare-allowed amounts for these services range $72–$72 (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 · 60 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Aripiprazole | 218 | 26 |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 197 | 16 |
| Trazodone Hcl | 193 | 24 |
| Quetiapine Fumarate | 163 | 16 |
| Gabapentin | 152 | 20 |
| Buspirone Hcl | 151 | 23 |
| Clonazepam |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$480 across 18 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
- 2006-10-12
- Last updated
- 2019-09-11
Frequently asked questions
- What is Lawrence Zelonis's NPI number?
- Lawrence Zelonis's National Provider Identifier (NPI) is 1427147503, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lawrence Zelonis's specialty?
- Lawrence Zelonis is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lawrence Zelonis located?
- Lawrence Zelonis's practice location on file with NPPES is 1610 N Main Street Ext, Butler, PA 16001-1513.
- What is Lawrence Zelonis's phone number?
- The practice phone number listed in the NPPES registry for Lawrence Zelonis is (724) 234-1370.
- Does Lawrence Zelonis accept Medicare?
- Lawrence Zelonis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lawrence Zelonis's NPI active?
- Yes — Lawrence Zelonis's NPI (1427147503) is active in the NPPES registry as of the last update on 2019-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.