Jaroslaw Leszczak, MD
NPI 1588606222 · Internal Medicine Physician · Park Ridge, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jaroslaw Leszczak, MD is a Internal Medicine Physician provider in Park Ridge, IL (NPI 1588606222).
Provider details
- NPI number
- 1588606222
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 36-096239 (IL)
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
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
5,734 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,689 | $132 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 844 | $17 |
| Therapy Procedure Using Exercise to Develop Strength, Endurance, Range of Motion, and Flexibility, Each 15 Minutes97110 | 499 | $22 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 491 | $24 |
| Therapy Procedure Using Manual Technique, Each 15 Minutes97140 | 431 | $21 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 130 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rosuvastatin Calcium | 376 | 126 |
| Atorvastatin Calcium | 346 | 100 |
| Levothyroxine Sodium | 325 | 87 |
| Amlodipine Besylate | 250 | 78 |
| Metformin Hcl | 201 | 64 |
| Pantoprazole Sodium | 176 | 64 |
| Losartan Potassium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,687 across 74 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
- 2006-06-10
- Last updated
- 2015-09-01
Frequently asked questions
- What is Jaroslaw Leszczak's NPI number?
- Jaroslaw Leszczak's National Provider Identifier (NPI) is 1588606222, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jaroslaw Leszczak's specialty?
- Jaroslaw Leszczak is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Jaroslaw Leszczak located?
- Jaroslaw Leszczak's practice location on file with NPPES is 1550 N Northwest Hwy, Park Ridge, IL 60068-1411.
- What is Jaroslaw Leszczak's phone number?
- The practice phone number listed in the NPPES registry for Jaroslaw Leszczak is (847) 653-8413.
- Does Jaroslaw Leszczak accept Medicare?
- Jaroslaw Leszczak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jaroslaw Leszczak's NPI active?
- Yes — Jaroslaw Leszczak's NPI (1588606222) is active in the NPPES registry as of the last update on 2015-09-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.