Colby Chastain, M.D.
NPI 1922056217 · Diagnostic Radiology Physician · Gainesville, GA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colby Chastain, M.D. is a Diagnostic Radiology Physician provider in Gainesville, GA (NPI 1922056217).
Provider details
- NPI number
- 1922056217
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 047968 (GA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
4,044 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 514 | $8 |
| Screening 3d Breast Mammography77063 | 238 | $27 |
| Screening Mammography77067 | 238 | $35 |
| Ct Scan of Abdomen and Pelvis With Contrast74177 | 215 | $83 |
| Ct Scan Head Or Brain Without Contrast70450 | 197 | $38 |
| Nuclear Medicine Study From Skull Base to Mid-Thigh With Ct Scan78815 | 173 | $109 |
Practice location
Mailing address
Additional practice locations (5)
- 1270 Friendship RdBraselton, GA 30517-5630Phone: (770) 718-1122
- 801 Austin DrDemorest, GA 30535-4513Phone: (770) 718-1122
- 835 Austin DrDemorest, GA 30535-4513Phone: (770) 718-1122
- 725 Jesse Jewell Pkwy SeGainesville, GA 30501-3834Phone: (770) 718-1122
- 655 Jesse Jewell Pkwy SeGainesville, GA 30501-3756Phone: (770) 718-1122
Registry dates
- Enumerated
- 2006-05-05
- Last updated
- 2025-09-23
- Certified
- 2025-09-23
Frequently asked questions
- What is Colby Chastain's NPI number?
- Colby Chastain's National Provider Identifier (NPI) is 1922056217, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colby Chastain's specialty?
- Colby Chastain is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Colby Chastain located?
- Colby Chastain's practice location on file with NPPES is 200 W Academy Street, Gainesville, GA 30501.
- What is Colby Chastain's phone number?
- The practice phone number listed in the NPPES registry for Colby Chastain is (770) 282-8820.
- Does Colby Chastain accept Medicare?
- Colby Chastain is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colby Chastain's NPI active?
- Yes — Colby Chastain's NPI (1922056217) is active in the NPPES registry as of the last update on 2025-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.