SEAN L. JOHNSTON M.D., PH.D. – NPI #1477581866
Radiology
A radiologist who diagnoses and treats diseases by various radiologic imaging modalities. These include fluoroscopy, digital radiography, computed tomography, sonography and magnetic resonance imaging.
SEAN JOHNSTON is a radiologist located in SANTA ANA, CA. NPPES has assigned the NPI number 1477581866 to SEAN JOHNSTON on June 28, 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 2085R0204X from the Health Care Provider Taxonomy code set, which is classified as Radiology, specializing in Vascular & Interventional Radiology Bear in mind that having a taxonomy code selected doesn't replace any credentialing or validation process that may be required by law.
The NPI profile was last updated on May 18, 2026. 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 SEAN JOHNSTON below.
NPI Profile for
SEAN L. JOHNSTON
(about 20 years ago)
SANTA ANA, CA 92704-5318 Phone: (805) 300-6761 Fax:
BURBANK, CA 91501-1121 Phone: (818) 416-5037 Fax:
Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.
Identifiers for SEAN JOHNSTON
Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.
| Description | Issuer | State | Identifier |
|---|---|---|---|
| other | MEDICAL LIC | CA | A73716 |
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 |
|---|---|---|
| 2085R0204X - Radiology / Vascular & Interventional Radiology (Primary) |
CA | A73716 |
| 2471M1202X - Radiologic Technologist / Magnetic Resonance Imaging Radiologic Technologist |
CA | 49574 |
| 2085U0001X - Radiology / Diagnostic Ultrasound |
CA | A73716 |
| 2085R0203X - Radiology / Radiation Oncology |
CA | A73716 |
| 2085R0202X - Radiology / Diagnostic Radiology |
CA | A73716 |
| 2085P0229X - Radiology / Pediatric Radiology |
CA | A73716 |
| 2085N0700X - Radiology / Neuroradiology |
CA | A73716 |
| 2085B0100X - Radiology / Body Imaging |
CA | A73716 |
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.
Additional Information
- Refer to Part B
- Order Durable Medical Equipment
- Refer to Home Health Agency
- Order Power Mobility Devices
SEAN JOHNSTON is affiliated with the following medical group(s):
- HOSPITAL
- ADVENTIST HEALTH CLEARLAKE15630 18TH AVE - HWY 53
CLEARLAKE, CA 95422 - ADVENTIST HEALTH HANFORD115 MALL DRIVE
HANFORD, CA 93230 - ADVENTIST HEALTH REEDLEY372 W CYPRESS AVE
REEDLEY, CA 93654 - MENDOCINO COAST DISTRICT HOSPITAL700 RIVER DRIVE
FORT BRAGG, CA 95437 - WHITE MEMORIAL MEDICAL CENTER1720 E CESAR AVENUE
LOS ANGELES, CA 90033
- ADVENTIST HEALTH CLEARLAKE15630 18TH AVE - HWY 53
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