DR. COLBY T CHASTAIN (M.D.) – Diagnostic Radiology Physician, NPI 1922056217
Diagnostic Radiology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,271 DIAGNOSTIC RADIOLOGY in GA
Provider Addresses for DR. COLBY T CHASTAIN (M.D.)
835 Austin Dr
Demorest, GA 305354513
Phone: (770) 718-1122
Type: Location
725 Jesse Jewell Pkwy SE
GAINESVILLE, GA 305013834
Phone: (770) 718-1122
Type: Location
655 Jesse Jewell Pkwy SE
Gainesville, GA 305013756
Phone: (770) 718-1122
Type: Location
1270 Friendship Rd
Braselton, GA 305175630
Phone: (770) 718-1122
Type: Location
801 Austin Dr
Demorest, GA 305354513
Phone: (770) 718-1122
Type: Location
Gainesville Post Office, 4600, Southwest 34th Street, Gainesville, Alachua County, Florida, 32608, United States
GAINESVILLE, GA 305032417
Phone: (770) 532-9936
Fax: (770) 534-9877
Type: Mailing
West Academy Street, Gainesville, Hall County, Georgia, 30501, United States
GAINESVILLE, GA 30501
Phone: (770) 282-8820
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
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Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2025-08-28
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20040624000500 | I | Diagnostic Radiology | GA | TBD |
| I20250828003810 | I | Diagnostic Radiology | SC | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 71045 | X-ray of chest, 1 view | 572 | 533 | $0 |
| 72148 | Mri scan of lower spinal canal without contrast | 227 | 227 | $0 |
| 74177 | Ct scan of abdomen and pelvis with contrast | 223 | 220 | $0 |
| 70450 | Ct scan head or brain without contrast | 189 | 181 | $0 |
| 78815 | Nuclear medicine study from skull base to mid-thigh with ct scan | 155 | 151 | $0 |
Insurance plans in this area (ZIP 30535)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| DIAGNOSTIC RADIOLOGY | GA | 71010 | X-ray of chest, 1 view, front | 1592 | 1350 |
| DIAGNOSTIC RADIOLOGY | GA | 71250 | CT scan chest | 143 | 139 |
| DIAGNOSTIC RADIOLOGY | GA | 73110 | X-ray of wrist, minimum of 3 views | 37 | 35 |
| DIAGNOSTIC RADIOLOGY | GA | 73140 | X-ray of fingers, minimum of 2 views | 14 | 12 |
| DIAGNOSTIC RADIOLOGY | GA | 73630 | X-ray of foot, minimum of 3 views | 54 | 52 |
| DIAGNOSTIC RADIOLOGY | GA | 74177 | CT scan of abdomen and pelvis with contrast | 50 | 49 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | MN | |
| Diagnostic Radiology | GA | |
| Diagnostic Radiology | FL | |
| Diagnostic Radiology | FL | |
| Diagnostic Radiology | IL | |
| Diagnostic Radiology | GA | |
| Diagnostic Radiology | TN | |
| Diagnostic Radiology | FL | |
| Diagnostic Radiology | GA | |
| Diagnostic Radiology | MN |
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