MARK STEVEN GROSSMAN MD
NPI 1457370736
Internal Medicine in Los Angeles, CA
About Mark Steven Grossman Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK STEVEN GROSSMAN MD (NPI 1457370736) is an individual internal medicine provider in Los Angeles, California, licensed in California (G79624) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (1993).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 5
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mark Steven Grossman Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Mark Grossman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90095
- Reassigned Medicare billing, California enrollment
- 1,766 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90095 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
LOS ANGELES, CA 90095
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 Mark Grossman's NPI number?
The NPI number for Mark Grossman is 1457370736. It was assigned to this individual provider in the NPPES registry on July 18, 2006.
Where is Mark Grossman located?
Mark Grossman practices at 200 Medical Plaza #365,530,420,120, Los Angeles, CA 90095. The listed phone number is (310) 208-7777.
What is Mark Grossman's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mark Grossman enrolled in Medicare?
Yes. Mark Grossman is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Mark Grossman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Grossman reassigns Medicare benefits to The Regents Of The University Of California (Los Angeles, CA). The 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 Mark Grossman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mark Grossman was last updated on June 24, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Mark Steven Grossman, MD · NPI 1457370736
Internal Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since July 18, 2006.
## Identity
- **NPI:** 1457370736 (Entity type: Individual)
- **Enumerated:** July 18, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** G79624 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 MEDICAL PLAZA, #365,530,420,120, Los Angeles, CA 90095-3075
- **Phone:** (310) 208-7777
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** The Regents Of The University Of California (NPI 1235107566, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Loyola University Of Chicago, Stritch School Of Medicine, class of 1993
## Record status
- **NPPES last updated:** June 24, 2010
- **Other identifiers:** Medicare PIN BZ813Z (CA); Medicare PIN WG79624B (CA); Medicare PIN WG79624A (CA); and 2 more
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Source: [NPI Profile](https://npiprofile.com/npi/1457370736) · Data from the CMS NPPES public registry.