Gregory Kaczmarek, MD
NPI 1629032958 · Internal Medicine Physician · Skokie, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Kaczmarek, MD is a Internal Medicine Physician provider in Skokie, IL (NPI 1629032958).
Provider details
- NPI number
- 1629032958
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036081697 (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
1,861 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 | 501 | $92 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 293 | $15 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 239 | $135 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 187 | $20 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 134 | $24 |
| Colorectal Cancer Screening; Fecal Occult Blood Test, Immunoassay, 1-3 Simultaneous |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 100 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 331 | 96 |
| Amlodipine Besylate | 198 | 42 |
| Gabapentin | 165 | 32 |
| Levothyroxine Sodium | 158 | 42 |
| Rosuvastatin Calcium | 152 | 48 |
| Montelukast Sodium | 127 | 35 |
| Metoprolol Succinate |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,948 across 152 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
- 2006-04-13
- Last updated
- 2008-05-12
Frequently asked questions
- What is Gregory Kaczmarek's NPI number?
- Gregory Kaczmarek's National Provider Identifier (NPI) is 1629032958, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Kaczmarek's specialty?
- Gregory Kaczmarek is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Kaczmarek located?
- Gregory Kaczmarek's practice location on file with NPPES is 4905 Old Orchard Ctr, Skokie, IL 60077-1425.
- What is Gregory Kaczmarek's phone number?
- The practice phone number listed in the NPPES registry for Gregory Kaczmarek is (847) 679-6707.
- Does Gregory Kaczmarek accept Medicare?
- Gregory Kaczmarek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Kaczmarek's NPI active?
- Yes — Gregory Kaczmarek's NPI (1629032958) is active in the NPPES registry as of the last update on 2008-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.