Bailey Frei, MD
Bailey Frei, MD is a Brain Injury Medicine (Physical Medicine & Rehabilitation) Physician in Chicago, IL, registered under NPI 1245810225. This provider registers 2 separate taxonomy codes, which usually means they practise across more than one recognised specialty.
Getting there
The practice address on file is 355 E ERIE ST, Chicago, IL 60611. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| 036.173964 | IL | Brain Injury Medicine (Physical Medicine… primary |
| 036.173964 | IL | Physical Medicine & Rehabilitation… |
This provider holds licence 036.173964 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 - Physical Medicine And Rehabilitation
- PAC ID
- 4486166139
Medicare enrolment is recorded as approved under the provider type Order And Referring Only - Physical Medicine And Rehabilitation. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Brain Injury Medicine covers
A Brain Injury Medicine physician specializes in disorders of brain function due to injury and disease. These disorders encompass a range of medical, physical, neurologic, cognitive, sensory, and behavioral disorders that result in psychosocial, educational, and vocational consequences. NUCC Health Care Provider Taxonomy, code 2081P0301X
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 | |
|---|---|---|---|---|
| 2081P0301X | Brain Injury Medicine (Physical Medicine & Rehabilitation) Physician Brain Injury Medicine | 036.173964 | IL | primary |
| 208100000X | Physical Medicine & Rehabilitation Physician | 036.173964 | 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 | 1245810225 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Apr 13, 2021 |
| Last updated | Jun 18, 2025 |
| Status | Active |
| Sole proprietor | No |
| Credential | MD |
| Practice address |
355 E ERIE ST Chicago, IL 60611 (312) 238-1000 |
| Mailing address |
600 N KINGSBURY ST APT 906 Chicago, IL 60654 |
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 | 2 | 4 | 5 | 8 | 1 | 0 | 2 | 2 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 2 | 8 | 5 | 7 | 1 | 0 | 2 | 4 |
Sum = 55 · next multiple of 10 = 60 · 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.