HYMAN GROSS, MD, INC
NPI 1275893521
Psychiatry & Neurology - Neurology in Santa Monica, CA
About Hyman Gross, Md, Inc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HYMAN GROSS, MD, INC (NPI 1275893521) is a healthcare organization registered as a neurology in Santa Monica, California and active in the NPI registry since May 2012. The organization lists Holly Gross, Office Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
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)
Hyman Gross, Md, Inc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
Medicare enrollment records show 1 clinician reassigns Medicare billing to Hyman Gross, MD, Inc, which bills Medicare for the services this clinician delivers.
Clinician (1)
Santa Monica, CA 90404
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 Hyman Gross, MD, Inc's NPI number?
The NPI number for Hyman Gross, MD, Inc is 1275893521. It was assigned to this organization in the NPPES registry on May 21, 2012.
Where is Hyman Gross, MD, Inc located?
Hyman Gross, MD, Inc is located at 2021 Santa Monica Blvd Suite 320E, Santa Monica, CA 90404. The listed phone number is (310) 998-2287.
What is Hyman Gross, MD, Inc's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Hyman Gross, MD, Inc enrolled in Medicare?
Yes. Hyman Gross, MD, Inc is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Hyman Gross, MD, Inc?
According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Neurology) reassigns their Medicare billing to Hyman Gross, MD, Inc. 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. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Hyman Gross, MD, Inc was last updated on May 21, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 years 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.
# Hyman Gross, Md, Inc · NPI 1275893521
Neurology organization in Santa Monica, California. Organization record, active in the CMS NPPES registry since May 21, 2012.
## Identity
- **NPI:** 1275893521 (Entity type: Organization)
- **Enumerated:** May 21, 2012
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **Organization subpart:** No
- **Authorized official:** Holly Gross, OFFICE MANAGER
## Practice location
- **Address:** 2021 SANTA MONICA BLVD, SUITE 320E, Santa Monica, CA 90404-2208
- **Phone:** (310) 998-2287 · **Fax:** (310) 998-2241
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 1 clinician (Neurology) reassigns Medicare billing to this organization (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** May 21, 2012
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Source: [NPI Profile](https://npiprofile.com/npi/1275893521) · Data from the CMS NPPES public registry.