Brett Riederman, MD
Brett Riederman, MD is an Internal Medicine Physician in Northbrook, IL, registered under NPI 1003375254. 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 Northbrook, based on OpenStreetMap data collected Sep 22, 2026. Parking is available about 799 ft away. There is EV charging 1,027 ft from the office — useful if you are driving in from out of town. The nearest transit stop is 367 ft away, served by Lake Cook & Skokie Blvd.
Getting here and what is nearby
Transit Skokie Blvd & Lake Cook 171 ft ~1 min
Gas station Shell 333 ft ~2 min
10 Skokie Valley Road, Highland Park 60035
Transit Lake Cook & Skokie Blvd 349 ft ~2 min
Transit Lake Cook & Skokie Blvd 367 ft ~2 min
Convenience Shell 392 ft ~2 min
10 Skokie Valley Road, Highland Park 60035
Parking 437 ft ~2 min
Gas station Thorntons 499 ft ~2 min
55 Skokie Valley Road, Highland Park 60035
Parking 541 ft ~3 min
Convenience Thorntons 567 ft ~3 min
55 Skokie Valley Road, Highland Park 60035
Parking 799 ft ~4 min
Restaurant Burger King 896 ft ~4 min
90 Skokie Valley Road, Highland Park 60035
Mo-Sa 05:30-22:00; Su 07:00-22:00
EV charging 1,006 ft ~4 min
EV charging 1,027 ft ~4 min
Grocery Trader Joe's 0.22 mi ~5 min
127 Skokie Boulevard, Northbrook 60062
Mo-Su 09:00-21:00
Restaurant McDonald's 0.23 mi ~5 min
200 Skokie Boulevard, Northbrook 60062
Mo-Th 05:00-23:00; Fr-Sa 05:00-24:00; Su 05:00-23:00
Grocery The Fresh Market 0.25 mi ~6 min
Restaurant The Protein Bar Kitchen 0.33 mi ~7 min
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 |
|---|---|---|
| 125.073830 | IL | Internal Medicine Physician primary |
This provider holds licence 125.073830 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 | 125.073830 | 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 | 1003375254 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Mar 18, 2019 |
| Last updated | Nov 19, 2025 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
40 SKOKIE BLVD. SUITE 110 Northbrook, IL 60062 (224) 407-4400 Fax (224) 407-2255 |
| Mailing address |
950 TECHNOLOGY WAY SUITE 250 Libertyville, IL 60048 |
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 | 3 | 7 | 5 | 2 | 5 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 7 | 1 | 2 | 1 |
Sum = 46 · next multiple of 10 = 50 · 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.