Leszek Ballarin, M.D.
NPI 1720088107 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leszek Ballarin, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1720088107).
Provider details
- NPI number
- 1720088107
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036103966 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
2,755 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) |
|---|---|---|
| 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 | 1,163 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,012 | $127 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 270 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 190 | $90 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 73 | $14 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 88 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Lisinopril | 518 | 175 |
| Rosuvastatin Calcium | 454 | 174 |
| Metoprolol Succinate | 411 | 140 |
| Amlodipine Besylate | 400 | 145 |
| Atorvastatin Calcium | 338 | 110 |
| Metformin Hcl | 321 | 104 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-07-27
- Last updated
- 2009-11-18
Frequently asked questions
- What is Leszek Ballarin's NPI number?
- Leszek Ballarin's National Provider Identifier (NPI) is 1720088107, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leszek Ballarin's specialty?
- Leszek Ballarin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Leszek Ballarin located?
- Leszek Ballarin's practice location on file with NPPES is 7045 W Belmont Ave, Chicago, IL 60634-4539.
- What is Leszek Ballarin's phone number?
- The practice phone number listed in the NPPES registry for Leszek Ballarin is (773) 745-7377.
- Does Leszek Ballarin accept Medicare?
- Leszek Ballarin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leszek Ballarin's NPI active?
- Yes — Leszek Ballarin's NPI (1720088107) is active in the NPPES registry as of the last update on 2009-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.