George Czajkowski, M.D.
NPI 1821021007 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
George Czajkowski, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1821021007).
Provider details
- NPI number
- 1821021007
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036-069503 (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
19 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
1,010 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 258 | $8 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 254 | $130 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 219 | $91 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 119 | $131 |
| Administration of Influenza Virus VaccineG0008 | 49 | $33 |
| Hemoglobin A1c Level83036 | 43 | $9 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 148 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 840 | 252 |
| Lisinopril | 552 | 166 |
| Amlodipine Besylate | 487 | 136 |
| Metformin Hcl | 343 | 116 |
| Metoprolol Succinate | 329 | 105 |
| Losartan Potassium | 309 | 91 |
| Levothyroxine Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-09
- Last updated
- 2021-12-26
- Certified
- 2021-12-26
Frequently asked questions
- What is George Czajkowski's NPI number?
- George Czajkowski's National Provider Identifier (NPI) is 1821021007, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is George Czajkowski's specialty?
- George Czajkowski is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is George Czajkowski located?
- George Czajkowski's practice location on file with NPPES is 4025 N Western Ave, Chicago, IL 60618-3726.
- What is George Czajkowski's phone number?
- The practice phone number listed in the NPPES registry for George Czajkowski is (773) 275-7700.
- Does George Czajkowski accept Medicare?
- George Czajkowski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is George Czajkowski's NPI active?
- Yes — George Czajkowski's NPI (1821021007) is active in the NPPES registry as of the last update on 2021-12-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.