GARRETT WALKER COLBY MD
NPI 1003018870
Radiology - Diagnostic Radiology in Birmingham, AL

Q: What is Garrett Colby's NPI number?

The NPI number for Garrett Colby is 1003018870. It was assigned to this individual provider in the NPPES registry on June 4, 2007.

Q: What is Garrett Colby's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Garrett Colby was last updated on August 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 04, 2007PECOS Enrolled

76.69/100

CMS Quality Rating

619 19TH ST S, JT N342, BIRMINGHAM, AL 35249(205) 934-3108(205) 975-4413 Get Directions Write a Review

NPPES record last updated: August 4, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Garrett Walker Colby Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

GARRETT WALKER COLBY MD (NPI 1003018870) is an individual diagnostic radiology provider in Birmingham, Alabama, licensed in Alabama (28517) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of University Of Alabama School Of Medicine (2006).

NPPES Registry Identity

NPI1003018870

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameGARRETT WALKER COLBYCredential: MD

Location Address619 19TH ST S, JT N342Birmingham, AL 35249-6830

Mailing Address619 19th St S, Jt N342Birmingham, AL 35249-6830 · (205) 934-3108 · Fax (205) 975-4413

Phone(205) 934-3108

Fax(205) 975-4413

Sole ProprietorNo

Medical School CMSUniversity Of Alabama School Of MedicineGraduated 2006

Enumeration DateJune 4, 2007

Last NPPES UpdateAugust 4, 2026

NPPES CertifiedAugust 4, 2026

✔ NPI 1003018870 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

License✔ Licensed in AL · 28517

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

619 19TH ST S, Birmingham, AL 35249

Open in Google Maps ↗

Secondary Practice Locations 2

Location 12624 Dawson RdAlbany, GA 31707-1609 · Phone (229) 888-1624

Location 21241 Assembly St Ste BColumbia, SC 29201-3121 · Phone (803) 766-3009

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health Maintenance Organization of Florida.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Garrett Walker Colby Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3375780877

PECOS Enrollment IDI20150602003062, I20170221002756

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Garrett Colby reassigns Medicare billing to 10 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of Alabama Health Services Foundation, PC.

2.5 mi

Multi-Specialty

619 19TH STREET SOUTH
Birmingham, AL 35233

Reassigned Medicare billing, Alabama enrollment
4,494 clinicians in this Medicare group

NPI 1093768723 (205) 934-6600

Birmingham Radiological Group PC

6.3 mi

Diagnostic Radiology

2000A SOUTHBRIDGE PKWY, STE 300
Birmingham, AL 35209

Reassigned Medicare billing, Alabama enrollment
61 clinicians in this Medicare group

NPI 1376594192 (205) 871-4274

West Jefferson Radiology, LLC

11 mi

Diagnostic Radiology

995 9TH AVE SW
Bessemer, AL 35022

Reassigned Medicare billing, Alabama enrollment
9 clinicians in this Medicare group

NPI 1053875278 (205) 481-8763

Synergy Radiology, LLC

124 mi

Radiology

9459 HIGHWAY 5 STE R
Douglasville, GA 30135

Reassigned Medicare billing, Georgia enrollment
207 clinicians in this Medicare group

NPI 1588229918 (470) 412-6300

Columbus Diagnostic Center Inc

131 mi

Diagnostic Radiology

7500 VETERANS PKWY STE B
Columbus, GA 31909

Reassigned Medicare billing, Alabama enrollment
3 clinicians in this Medicare group

NPI 1598081093 (706) 323-7622

Pro Radiology, LLC

146 mi

Radiology

60 PEACHTREE PARK DR NE
Atlanta, GA 30309

Reassigned Medicare billing, Georgia enrollment
202 clinicians in this Medicare group

NPI 1164966461 (678) 278-8800

M & B Imaging, PC

186 mi

Radiology

1640 JESSE JEWELL PKWY SE STE 2
Gainesville, GA 30501

Reassigned Medicare billing, Georgia enrollment
191 clinicians in this Medicare group

NPI 1932624723 (404) 296-5887

Vision Imaging Center LLC

252 mi

Magnetic Resonance Imaging (MRI)

2544 EAST PINETREE BOULEVARD
Thomasville, GA 31792

Reassigned Medicare billing, Georgia enrollment
23 clinicians in this Medicare group

NPI 1346947637 (229) 516-1411

Coastal Imaging Solutions LLC

353 mi

Radiology

503 EISENHOWER DR
Savannah, GA 31406

Reassigned Medicare billing, Georgia enrollment
51 clinicians in this Medicare group

NPI 1114263456 (912) 355-6255

South Georgia Radiology Associates, LLC

353 mi

Diagnostic Radiology

7505 WATERS AVE STE F10
Savannah, GA 31406

Reassigned Medicare billing, Alabama and Georgia enrollments
9 clinicians in this Medicare group

NPI 1760669931 (706) 975-5993

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 44

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml Q9967

Low osmolar contrast material with 300-399 mg/ml iodine concentration is a diagnostic tool used in imaging procedures. It helps to enhance the visibility of specific areas in the body, aiding in accurate diagnosis. It's safe and generally well-tolerated by patients.

1,275 services13 patients

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

295 services218 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

105 services98 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

75 services74 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

74 services74 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

64 services64 patients

X-ray of chest, 2 views 71046

53 services53 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

51 services51 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

46 services46 patients

Mri scan of leg joint without contrast 73721

An MRI scan of your leg joint is a non-invasive procedure that uses magnetic fields and radio waves to create detailed images of the structures within your leg. This helps doctors diagnose or monitor conditions without using contrast dye.

44 services42 patients

Ct scan of abdomen and pelvis with contrast 74177

42 services42 patients

Screening mammography 77067

Screening mammography is a preventative measure that uses low-dose X-rays to take images of the chest area. It's a key tool in early detection of abnormalities, helping to identify issues before they become symptomatic. It is recommended annually for certain age groups.

41 services41 patients

Ct scan of abdomen and pelvis without contrast 74176

40 services40 patients

Limited ultrasound scan of abdomen 76705

A limited ultrasound scan of the abdomen is a non-invasive imaging test. It uses sound waves to produce images of the abdominal organs such as the liver, gallbladder, spleen, pancreas, and kidneys. This helps to identify any abnormalities or issues.

39 services39 patients

Mri scan of arm joint without contrast 73221

An MRI scan of the arm joint is a non-invasive imaging procedure that uses magnetic fields and radio waves to create detailed images of the structures within your arm joint. No contrast dye is used in this process. It helps to diagnose or monitor conditions like arthritis, injuries, or infections.

35 services35 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

34 services33 patients

Mri scan of upper spinal canal without contrast 72141

An MRI scan of the upper spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your upper spine. This helps doctors identify issues such as injuries, infections or diseases. No dye is used.

33 services33 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

32 services32 patients

Ct scan of abdomen and pelvis before and after contrast 74178

A CT scan of your abdomen and pelvis with and without contrast helps visualize your internal organs better. Contrast is a special dye that improves the clarity of the images. It's taken orally or injected into your veins before the scan. The process is painless and quick.

32 services32 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

31 services31 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

30 services29 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

26 services25 patients

Ct scan of chest without contrast 71250

24 services24 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

24 services23 patients

Complete ultrasound scan behind abdominal cavity 76770

23 services22 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

21 services21 patients

Complete ultrasound scan of abdomen 76700

A complete ultrasound scan of the abdomen is a non-invasive imaging procedure. It uses sound waves to produce images of the organs in your abdomen, such as the liver, gallbladder, spleen, pancreas, and kidneys. It helps in diagnosing, monitoring, and planning treatments.

21 services21 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

20 services19 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

19 services17 patients

Dxa bone density measurement of hip, pelvis, spine 77080

A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.

18 services18 patients

Mri scan of lower spinal canal without contrast 72148

17 services17 patients

X-ray of abdomen, 2 views 74019

An X-ray of the abdomen, 2 views, is a non-invasive imaging test. It uses a small amount of radiation to capture pictures of the structures inside your belly. The two views provide different angles, helping doctors see your organs clearly and detect any issues.

17 services16 patients

Mri scan of brain before and after contrast 70553

An MRI scan of the brain, both before and after contrast, helps visualize different brain structures. Initially, images are taken without a contrast agent. Then, a safe dye is injected which helps highlight certain areas, providing clearer, more detailed images.

16 services16 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

16 services16 patients

X-ray of hip, 2-3 views 73502

16 services16 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

15 services15 patients

Ultrasound scan of organ tissue for measuring elasticity 76981

An ultrasound scan of organ tissue measures elasticity, or flexibility. This non-invasive procedure uses sound waves to create images of the inside of your body. It helps in assessing the health of various organs by detecting changes in their stiffness or softness.

15 services15 patients

Mri scan of brain without contrast 70551

An MRI scan of the brain without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your brain. It helps in detecting abnormalities like tumors, stroke, inflammation, or infection.

14 services14 patients

Ct scan head or brain without contrast 70450

13 services13 patients

Dxa bone density measurement of hip, pelvis, spine 77080

13 services13 patients

X-ray of shoulder, minimum of 2 views 73030

12 services12 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

12 services12 patients

Mri scan of middle spinal canal without contrast 72146

An MRI scan of the middle spinal canal without contrast is a non-invasive imaging test. It uses magnetic fields and radio waves to create detailed images of your spine. This helps doctors identify any abnormalities or issues in your spinal canal. No dye is used in this procedure.

11 services11 patients

Limited ultrasound scan of abdomen 76705

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 35249 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$81.90 typical visit price

range $52.65 – $161.63

Typical copayment $20.47 (range $13.16 – $40.40)

Most-billed visit code 99203

Established Patient

$66.08 typical visit price

range $16.56 – $131.65

Typical copayment $16.52 (range $4.14 – $32.91)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.69/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

72.58

Improvement Activities

Reported Quality Measures

Radiology: Reminder System for Screening Mammograms

Percentage of patients undergoing a screening mammogram whose information is entered into a reminder system with a target due date for the next mammogram

94%221 patients

Radiology: Stenosis Measurement in Carotid Imaging Reports

Percentage of final reports for carotid imaging studies (neck magnetic resonance angiography [MRA], neck computed tomography angiography [CTA], neck duplex ultrasound, carotid angiogram) performed that include direct or indirect reference to measurements of…

99%78 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SHANA MONIKA MACHADO D.O.

Internal Medicine (Nephrology)