Cathryn Sawalski, DO, MBA
Cathryn Sawalski, DO, MBA is an Internal Medicine Physician in Maywood, IL, registered under NPI 1003492620. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
Here is what surrounds this office in Maywood, based on OpenStreetMap data collected Sep 3, 2026. Parking is available about 0.34 mi away. The nearest transit stop is 1,015 ft away, served by 1st Avenue & Roosevelt.
Getting here and what is nearby
Transit Loyola Hospital Medical Center 284 ft ~2 min
Transit Loyola Surgical Pavilion 338 ft ~2 min
Transit 1st Avenue & Roosevelt 1,015 ft ~4 min
Gas station Shell 0.24 mi ~5 min
Convenience Shell 0.25 mi ~6 min
Parking 0.25 mi ~5 min
sunrise-sunset
Restaurant Slice Factory 0.25 mi ~5 min
211 Roosevelt Road, Maywood 60153
Restaurant Burger King 0.25 mi ~6 min
Restaurant Poor Boy 0.25 mi ~6 min
101 Roosevelt Road, Maywood 60153
Parking 0.27 mi ~6 min
sunrise-sunset
Parking 0.34 mi ~7 min
sunrise-sunset
Convenience Citgo 0.42 mi ~9 min
715 Roosevelt Road, Maywood 60153
Gas station Citgo 0.42 mi ~9 min
715 Roosevelt Road, Maywood 60153
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 125.077389 | IL | Internal Medicine Physician primary |
| 125.077389 | IL | Cardiovascular Disease Physician |
This provider holds licence 125.077389 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Internal Medicine covers
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs. NUCC Health Care Provider Taxonomy, code 207R00000X
All registered taxonomy codes
This provider registers 2 taxonomy codes. The primary code is what appears on most claims; the others record additional recognised specialties.
| Code | Specialty | Licence | State | |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | 125.077389 | IL | primary |
| 207RC0000X | Cardiovascular Disease Physician Cardiovascular Disease | 125.077389 | IL |
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003492620 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 23, 2021 |
| Last updated | Mar 21, 2024 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | DO, MBA |
| Practice address |
2160 S 1ST AVE Maywood, IL 60153 (888) 584-7888 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 4 | 9 | 2 | 6 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 9 | 4 | 6 | 4 |
Sum = 60 · next multiple of 10 = 60 · check digit = 0 · actual last digit = 0
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.