Pierce Paterakos
Pierce Paterakos is an Internal Medicine Physician in Chicago, IL, registered under NPI 1003759945. NPPES records them as a sole proprietor, meaning the practice is not incorporated as a separate legal entity.
Getting there
Here is what surrounds this office in Chicago, based on OpenStreetMap data collected Oct 5, 2026. Parking is available about 0.51 mi away. The nearest transit stop is 352 ft away, served by Foster & California. A pharmacy sits 0.33 mi from the entrance (Walgreens), which helps if you leave with a prescription. If you arrive early, there is a coffee shop 0.48 mi away.
Getting here and what is nearby
Parking Swedish Covenant Hospital 277 ft ~2 min
2801-2839 West Winona Street
Transit Foster & California 310 ft ~2 min
Transit California & Foster 338 ft ~2 min
Restaurant Hilltop 319 ft ~2 min
2800 West Foster Avenue, Chicago 60625
Transit Foster & California 352 ft ~2 min
Restaurant Au Bon Pain 366 ft ~2 min
Parking 452 ft ~2 min
Pharmacy Walgreens 0.33 mi ~7 min
5158 North Lincoln Avenue, Chicago 60625
Restaurant Dunkin' 0.35 mi ~7 min
5200 North Lincoln Avenue, Chicago 60625
05:00-22:00
Hotel Diplomat Motel 0.36 mi ~8 min
5230 North Lincoln Avenue, Chicago 60625
Coffee Royal Cafe 0.39 mi ~8 min
5074 North Lincoln Avenue, Chicago 60625
Hotel Summit Motel 0.40 mi ~8 min
5308-5310 North Lincoln Avenue, Chicago 60625
Grocery Tony's Fresh Market 0.40 mi ~8 min
Coffee Cafe Utjeha 0.43 mi ~9 min
Convenience Mobil Mart 0.43 mi ~9 min
2800 West Lawrence Avenue, Chicago 60625
Gas station Mobil 0.44 mi ~9 min
2800 West Lawrence Avenue, Chicago 60625
Convenience Food & Liquor Express 0.45 mi ~9 min
2752 West Lawrence Avenue, Chicago 60625
Coffee Shibam Coffee 0.48 mi ~10 min
Grocery HarvesTime Foods 0.48 mi ~10 min
Parking 0.51 mi ~11 min
5434-5458 North Lincoln Avenue, Chicago 60625
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 |
|---|---|---|
| 125.088106 | IL | Internal Medicine Physician primary |
This provider holds licence 125.088106 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
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 | 1003759945 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 14, 2026 |
| Last updated | Jun 4, 2026 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
5140 N CALIFORNIA AVE Chicago, IL 60625 (773) 878-8200 |
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 | 7 | 5 | 9 | 9 | 4 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 5 | 5 | 9 | 9 | 8 |
Sum = 65 · next multiple of 10 = 70 · check digit = 5 · actual last digit = 5
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.