Garrett Colby, MD
Garrett Colby, MD is a Diagnostic Radiology Physician in Birmingham, AL, registered under NPI 1003018870.
Getting there
Here is what surrounds this office in Birmingham, based on OpenStreetMap data collected Aug 30, 2026. Parking is available about 0.48 mi away at UAB Parking Deck Zone A. There is EV charging 0.44 mi from the office (Birmingham, AL - 1st Avenue South Supercharger) — useful if you are driving in from out of town. The nearest transit stop is 547 ft away, served by SE Corner of 6th Av S & 20th St S. If you arrive early, there is a coffee shop 0.43 mi away.
Getting here and what is nearby
Restaurant Chick-fil-A 192 ft ~1 min
625 19th Street South, Birmingham 35233
Mo-Sa 07:00-22:00; Su closed
Transit SW Corner of 20th St S & 6th Av S 433 ft ~2 min
Parking 414 ft ~2 min
Parking 6th Avenue Deck 449 ft ~2 min
Restaurant Panera Bread 487 ft ~2 min
1802 6th Avenue South, Birmingham 35233
Mo-Fr 06:00-21:00; Sa-Su 08:00-18:00
Transit NE Corner of 20th St S & 7th Av S 540 ft ~3 min
Transit SE Corner of 6th Av S & 20th St S 547 ft ~3 min
Hotel Courtyard by Marriott Birmingham Downtown At UAB 723 ft ~3 min
Restaurant Moe's Southwest Grill 815 ft ~4 min
1801 4th Avenue South, Birmingham 35233
10:30-21:00
Convenience Mac's One Stop 863 ft ~4 min
Gas station Texaco 878 ft ~4 min
Hotel Hilton Birmingham Downtown at UAB 0.22 mi ~5 min
Coffee Starbucks 0.24 mi ~5 min
Hotel SpringHill Suites Birmingham Downtown at UAB 0.24 mi ~5 min
Grocery Publix 0.28 mi ~6 min
230 20th Street South, Birmingham 35233
Mo-Su 07:00-22:00
Coffee The Red Cat 0.43 mi ~9 min
EV charging Birmingham, AL - 1st Avenue South Supercharger 0.44 mi ~9 min
Convenience Southtown Convenience Store 0.45 mi ~9 min
900 23rd Street South, Birmingham 35205
Gas station Shell 0.45 mi ~10 min
Parking UAB Parking Deck Zone A 0.48 mi ~10 min
1012 17th Street South, Birmingham 35205
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 |
|---|---|---|
| 28517 | AL | Diagnostic Radiology Physician primary |
This provider holds licence 28517 issued in AL. 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
- Practitioner - Diagnostic Radiology
- PAC ID
- 3375780877
Enrolled in Medicare 2 times, across 2 states:
| State | Enrollment ID | Provider type |
|---|---|---|
| Alabama | I20150602003062 | Practitioner - Diagnostic Radiology |
| Georgia | I20170221002756 | Practitioner - Diagnostic Radiology |
Medicare enrolment is recorded as approved under the provider type Practitioner - Diagnostic Radiology. There are 2 separate enrolment records across 2 states (AL, GA). Multiple enrolments usually mean the provider bills Medicare from more than one practice location, or has kept an earlier enrolment after moving. Each record carries its own enrolment ID, listed above. 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 Diagnostic Radiology covers
A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease. NUCC Health Care Provider Taxonomy, code 2085R0202X
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 | 1003018870 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Jun 4, 2007 |
| Last updated | Aug 4, 2026 |
| Status | Active |
| Sole proprietor | No |
| Gender | Male |
| Credential | MD |
| Practice address |
619 19TH ST S JT N342 Birmingham, AL 35249 (205) 934-3108 Fax (205) 975-4413 |
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 | 0 | 1 | 8 | 8 | 7 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 0 | 1 | 7 | 8 | 5 |
Sum = 50 · next multiple of 10 = 50 · 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.