GROSSMAN AND GROSSMAN M D S A MEDICAL CORPORATION
NPI 1255483525
Obstetrics & Gynecology - Obstetrics in Thousand Oaks, CA
About Grossman And Grossman M D S A Medical Corporation NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GROSSMAN AND GROSSMAN M D S A MEDICAL CORPORATION (NPI 1255483525) is a healthcare organization registered as an obstetrics in Thousand Oaks, California and active in the NPI registry since January 2007. The organization lists Robert Grossman, President, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Grossman And Grossman M D S A Medical Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
3Medicare enrollment records show 3 clinicians reassign Medicare billing to Grossman And Grossman M D S A Medical Corporation, which bills Medicare for the services they deliver. Of these, 2 practice at this address. They are listed nearest first.
Clinicians, nearest first (3)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Frequently 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 Grossman And Grossman M D S A Medical Corporation's NPI number?
The NPI number for Grossman And Grossman M D S A Medical Corporation is 1255483525. It was assigned to this organization in the NPPES registry on January 17, 2007.
Where is Grossman And Grossman M D S A Medical Corporation located?
Grossman And Grossman M D S A Medical Corporation is located at 558 N Ventu Park Rd Suite A, Thousand Oaks, CA 91320. The listed phone number is (805) 498-0240.
What is Grossman And Grossman M D S A Medical Corporation's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Obstetrics, with taxonomy code 207VX0000X.
Is Grossman And Grossman M D S A Medical Corporation enrolled in Medicare?
Yes. Grossman And Grossman M D S A Medical Corporation is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Grossman And Grossman M D S A Medical Corporation?
According to the CMS Revalidation Reassignment List (October 2026 release), 3 clinicians reassign their Medicare billing to Grossman And Grossman M D S A Medical Corporation, in Internal Medicine and Obstetrics/Gynecology. 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. Of these, 2 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Grossman And Grossman M D S A Medical Corporation was last updated on August 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.
# Grossman And Grossman M D S A Medical Corporation · NPI 1255483525
Obstetrics organization in Thousand Oaks, California. Organization record, active in the CMS NPPES registry since January 17, 2007.
## Identity
- **NPI:** 1255483525 (Entity type: Organization)
- **Enumerated:** January 17, 2007
- **Primary specialty:** Obstetrics & Gynecology - Obstetrics · taxonomy 207VX0000X
- **Organization subpart:** No
- **Authorized official:** Robert Grossman, PRESIDENT
## Practice location
- **Address:** 558 N VENTU PARK RD, SUITE A, Thousand Oaks, CA 91320-2718
- **Phone:** (805) 498-0240
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 3 clinicians in 2 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Obstetrics/Gynecology (2), Internal Medicine (1); 2 practice at this address · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** August 4, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1255483525) · Data from the CMS NPPES public registry.