Nicholas Rigler
Nicholas Rigler is an Internal Medicine Physician in Chicago, IL, registered under NPI 1003490194. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty. 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 Sep 30, 2026. Parking is available about 0.23 mi away. The nearest transit stop is 380 ft away, served by Harrison & Paulina. If you arrive early, there is a coffee shop 0.39 mi away.
Getting here and what is nearby
Transit Harrison & Ashland 203 ft ~1 min
Transit Harrison & Ashland 294 ft ~2 min
Restaurant Au Bon Pain 299 ft ~2 min
Transit Harrison & Paulina 380 ft ~2 min
Restaurant Subway 373 ft ~2 min
1611 West Harrison Street, Chicago 60612
Mo-Fr 06:30-21:00; Sa 07:00-17:00; Su 10:00-17:00
Coffee Starbucks 526 ft ~2 min
600 South Paulina Street, Chicago
Hotel Courtyard by Marriott Chicago at Medical District / UIC 573 ft ~3 min
Convenience Papo's Express 754 ft ~3 min
1600 West Van Buren Street, Chicago 60612
Gas station BP 714 ft ~3 min
Parking Rush Staff & Student Parking 805 ft ~4 min
1625 West Flournoy Street, Chicago 60612
Parking 896 ft ~4 min
711 South Ashland Avenue
Coffee Leaf and Bean Cafe 1,010 ft ~4 min
700 South Hermitage Avenue, Chicago 60612
Hotel Hotel Chicago West Loop 0.22 mi ~5 min
Hotel Hyatt House Chicago - Medical / University District 0.23 mi ~5 min
Parking 0.23 mi ~5 min
1640 West Jackson Boulevard
Restaurant Dunkin' 0.25 mi ~5 min
Coffee FROTH 0.39 mi ~8 min
1515 West Monroe Street, Chicago 60607
Th-Sa 08:00-23:00; Su-We 08:00-19:00
Convenience 7-Eleven 0.39 mi ~8 min
Convenience Campus Market 0.41 mi ~9 min
West Taylor Street, Chicago 60607
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 |
|---|---|---|
| 125.081797 | IL | Internal Medicine Physician primary |
This provider holds licence 125.081797 issued in IL. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Order And Referring Only - Internal Medicine
- PAC ID
- 5496100661
- Enrollment ID
- I20231006003076
Medicare enrolment is recorded as approved under the provider type Order And Referring Only - Internal Medicine. Being enrolled means the provider can bill Medicare; it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
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 | 125.081797 | IL | primary |
| 390200000X | Student in an Organized Health Care Education/Training Program | — | — |
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 | 1003490194 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 6, 2021 |
| Last updated | May 12, 2023 |
| Status | Active |
| Sole proprietor | Yes |
| Gender | Male |
| Practice address |
1620 W HARRISON ST Chicago, IL 60612 (312) 942-5000 |
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 | 0 | 1 | 9 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 8 | 9 | 0 | 1 | 9 |
Sum = 56 · next multiple of 10 = 60 · check digit = 4 · actual last digit = 4
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.