Robert Chalupczak, M.D.
NPI 1679505051 · Internal Medicine Physician · Oak Lawn, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Chalupczak, M.D. is a Internal Medicine Physician provider in Oak Lawn, IL (NPI 1679505051).
Provider details
- NPI number
- 1679505051
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036098369 (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
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
2,465 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 | 529 | $131 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 403 | $64 |
| 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 | 255 | $17 |
| Face-To-Face Behavioral Counseling for Obesity, 15 MinutesG0447 | 176 | $26 |
| Annual, Face-To-Face Intensive Behavioral Therapy for Cardiovascular Disease, Individual, 15 MinutesG0446 | 132 | $26 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 304 | 91 |
| Amlodipine Besylate | 196 | 57 |
| Levothyroxine Sodium | 126 | 35 |
| Lisinopril | 118 | 33 |
| Metformin Hcl | 105 | 31 |
| Rosuvastatin Calcium | 104 | 33 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$877 across 45 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
- 2006-07-07
- Last updated
- 2021-12-28
- Certified
- 2021-12-28
Frequently asked questions
- What is Robert Chalupczak's NPI number?
- Robert Chalupczak's National Provider Identifier (NPI) is 1679505051, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Chalupczak's specialty?
- Robert Chalupczak is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Chalupczak located?
- Robert Chalupczak's practice location on file with NPPES is 4301 W 95th St, Oak Lawn, IL 60453-2670.
- What is Robert Chalupczak's phone number?
- The practice phone number listed in the NPPES registry for Robert Chalupczak is (708) 425-5500.
- Does Robert Chalupczak accept Medicare?
- Robert Chalupczak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Chalupczak's NPI active?
- Yes — Robert Chalupczak's NPI (1679505051) is active in the NPPES registry as of the last update on 2021-12-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.