National Radiology Group, LLC
NPI 1649426156 · Diagnostic Radiology Physician · Marion, IL
National Radiology Group, LLC is a Diagnostic Radiology Physician organization in Marion, IL (NPI 1649426156).
Provider details
- NPI number
- 1649426156
- Entity type
- Organization
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- William Sweat, President/Ceo(314) 303-3900
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-08-15
- Last updated
- 2008-08-15
Frequently asked questions
- What is National Radiology Group, LLC's NPI number?
- National Radiology Group, LLC's National Provider Identifier (NPI) is 1649426156, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is National Radiology Group, LLC?
- National Radiology Group, LLC is classified in the NPPES registry as Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is National Radiology Group, LLC located?
- National Radiology Group, LLC's practice location on file with NPPES is 3333 W Deyoung St, Marion, IL 62959-5884.
- What is National Radiology Group, LLC's phone number?
- The practice phone number listed in the NPPES registry for National Radiology Group, LLC is (618) 998-7000.
- Who is the authorized official for National Radiology Group, LLC?
- The authorized official listed on National Radiology Group, LLC's NPPES record is William Sweat, President/Ceo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is National Radiology Group, LLC's NPI active?
- Yes — National Radiology Group, LLC's NPI (1649426156) is active in the NPPES registry as of the last update on 2008-08-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.