Ronald Lenefsky, MD
NPI 1588663546 · Infectious Disease Physician · West Islip, NY
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ronald Lenefsky, MD is a Infectious Disease Physician provider in West Islip, NY (NPI 1588663546).
Provider details
- NPI number
- 1588663546
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 191235 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 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
1,909 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 50 Minutes99233 | 384 | $134 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 316 | $209 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 298 | $9 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 270 | $89 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 222 | $148 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 90 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 298 | 88 |
| Rosuvastatin Calcium | 231 | 66 |
| Losartan Potassium | 201 | 58 |
| Amlodipine Besylate | 185 | 48 |
| Hydrochlorothiazide | 180 | 49 |
| Levothyroxine Sodium | 148 | 42 |
| Alprazolam |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$900 across 1 record (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
- 2005-07-20
- Last updated
- 2024-12-30
- Certified
- 2024-12-30
Frequently asked questions
- What is Ronald Lenefsky's NPI number?
- Ronald Lenefsky's National Provider Identifier (NPI) is 1588663546, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ronald Lenefsky's specialty?
- Ronald Lenefsky is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Ronald Lenefsky located?
- Ronald Lenefsky's practice location on file with NPPES is 500 Montauk Hwy, West Islip, NY 11795-4418.
- What is Ronald Lenefsky's phone number?
- The practice phone number listed in the NPPES registry for Ronald Lenefsky is (631) 587-7733.
- Does Ronald Lenefsky accept Medicare?
- Ronald Lenefsky is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ronald Lenefsky's NPI active?
- Yes — Ronald Lenefsky's NPI (1588663546) is active in the NPPES registry as of the last update on 2024-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.