HEALTH DIAGNOSTICS OF CALIFORNIA A PROFESSIONAL CORPORATION
NPI 1104321959
Radiology - Diagnostic Radiology in Mountain View, CA
About Health Diagnostics Of California A Professional Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HEALTH DIAGNOSTICS OF CALIFORNIA A PROFESSIONAL CORPORATION (NPI 1104321959), doing business as Simonmed Imaging, is a healthcare organization registered as a diagnostic radiology in Mountain View, California and active in the NPI registry since March 2018. The organization holds a CLIA Waiver certificate valid through March 19, 2027 and lists Howard John Simon, Ceo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Health Diagnostics Of California A Professional Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date 2
Next revalidation due by October 31, 2026
This provider holds 2 Medicare enrollments with upcoming revalidation dates. Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
372Medicare enrollment records show 372 clinicians reassign Medicare billing to Health Diagnostics Of California A Professional Corporation, which bills Medicare for the services they deliver. Of these, 11 practice within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 16
Nearest to this location (20)
See all 372Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 03D2320545
Simonmed Imaging-Kierland · Scottsdale, AZFrequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Health Diagnostics Of California A Professional Corporation's NPI number?
The NPI number for Health Diagnostics Of California A Professional Corporation is 1104321959. It was assigned to this organization in the NPPES registry on March 26, 2018. The provider is doing business as Simonmed Imaging.
Where is Health Diagnostics Of California A Professional Corporation located?
Health Diagnostics Of California A Professional Corporation is located at 105 South Dr Ste 110, Mountain View, CA 94040. The listed phone number is (650) 259-3165.
What is Health Diagnostics Of California A Professional Corporation's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Health Diagnostics Of California A Professional Corporation enrolled in Medicare?
Yes. Health Diagnostics Of California A Professional Corporation is registered in the Medicare PECOS enrollment system.
When is Health Diagnostics Of California A Professional Corporation's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), Health Diagnostics Of California A Professional Corporation holds 2 Medicare enrollments with upcoming revalidation dates. The next is due by October 31, 2026 (Non-DME Part B, Indiana, Clinic/Group Practice). Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Health Diagnostics Of California A Professional Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 372 clinicians in 16 Medicare specialties reassign their Medicare billing to Health Diagnostics Of California A Professional Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Diagnostic Radiology (316), Cardiovascular Disease (Cardiology) (20) and Nurse Practitioner (11). Of these, 11 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Health Diagnostics Of California A Professional Corporation hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 03D2320545) is associated with this NPI, valid through March 19, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
What insurance does Health Diagnostics Of California A Professional Corporation accept?
Health plans from Oscar Health, Oscar Health Maintenance Organization of Florida and Oscar Health Plan, Inc. list Health Diagnostics Of California A Professional Corporation as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Health Diagnostics Of California A Professional Corporation was last updated on September 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Health Diagnostics Of California A Professional Corporation · NPI 1104321959
Diagnostic Radiology organization in Mountain View, California. Organization record, active in the CMS NPPES registry since March 26, 2018.
## Identity
- **NPI:** 1104321959 (Entity type: Organization)
- **Enumerated:** March 26, 2018
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **Also known as:** SIMONMED IMAGING (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** Howard Simon, CEO
## Practice location
- **Address:** 105 SOUTH DR STE 110, Mountain View, CA 94040-4317
- **Phone:** (650) 259-3165 · **Fax:** (602) 302-5706
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** October 31, 2026 (Non-DME Part B, Indiana, Clinic/Group Practice), next of 2 enrollments with upcoming dates · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 372 clinicians in 16 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Diagnostic Radiology (316), Cardiovascular Disease (Cardiology) (20), Nurse Practitioner (11); 11 practice within 10 miles; [full list](https://npiprofile.com/npi/1104321959/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 22, 2026
- **CLIA laboratory certificates:** 1 on file
---
Source: [NPI Profile](https://npiprofile.com/npi/1104321959) · Data from the CMS NPPES public registry.