MARK JOHNSON MD – NPI #1780618694
Radiology
A radiologist who is involved in the analysis and imaging of radionuclides and radiolabeled substances in vitro and in vivo for diagnosis and the administration of radionuclides and radiolabeled substances for the treatment of disease.
MARK JOHNSON is a radiologist located in SOUTHBURY, CT. NPPES has assigned the NPI number 1780618694 to MARK JOHNSON on July 10, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 2085N0904X from the Health Care Provider Taxonomy code set, which is classified as Radiology, specializing in Nuclear Radiology
The NPI profile was last updated on Sep 11, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for MARK JOHNSON below.
NPI Profile for
MARK JOHNSON
(about 20 years ago)
UNION SQUARE
SOUTHBURY, CT 06488 Phone: (203) 264-7999 Fax: (203) 264-7477
A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.
| Taxonomy Classification / Specialization | State | License |
|---|---|---|
| 2085N0904X - Radiology / Nuclear Radiology (Primary) |
CT | 022134 |
| 2085U0001X - Radiology / Diagnostic Ultrasound |
CT | 022134 |
| 2085R0202X - Radiology / Diagnostic Radiology |
CT | 022134 |
The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.