ANDREW GROCK MD
NPI 1285922310
Emergency Medicine in Los Angeles, CA
About Andrew Grock Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ANDREW GROCK MD (NPI 1285922310) is an individual emergency medicine provider in Los Angeles, California, licensed in California (A135364) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Andrew Grock Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Andrew Grock reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Santa Monica, CA 90405
- Reassigned Medicare billing, California enrollment
- 1,939 clinicians in this Medicare group
Inglewood, CA 90301
- Reassigned Medicare billing, California enrollment
- 111 clinicians in this Medicare group
Long Beach, CA 90806
- Reassigned Medicare billing, California enrollment
- 75 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90073 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 90073
LOS ANGELES, CA 90073
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 Andrew Grock's NPI number?
The NPI number for Andrew Grock is 1285922310. It was assigned to this individual provider in the NPPES registry on July 11, 2011.
Where is Andrew Grock located?
Andrew Grock practices at 11301 Wilshire Blvd, Los Angeles, CA 90073. The listed phone number is (310) 478-3711.
What is Andrew Grock's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Andrew Grock enrolled in Medicare?
Yes. Andrew Grock is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Andrew Grock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Grock reassigns Medicare benefits to 3 organizations: County Of Los Angeles (Santa Monica, CA), Centinela Freeman Emergency Medical Associates, Inc. (Inglewood, CA) and Columbia Emergency Medical Group Inc (Long Beach, CA). Each 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 Andrew Grock'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 Andrew Grock was last updated on April 8, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Andrew Grock, MD · NPI 1285922310
Emergency Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since July 11, 2011.
## Identity
- **NPI:** 1285922310 (Entity type: Individual)
- **Enumerated:** July 11, 2011
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A135364 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 11301 WILSHIRE BLVD, Los Angeles, CA 90073-1003
- **Phone:** (310) 478-3711
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): County Of Los Angeles (NPI 1235323080, Santa Monica, CA); Centinela Freeman Emergency Medical Associates, Inc. (NPI 1528333101, Inglewood, CA); Columbia Emergency Medical Group Inc (NPI 1871551119, Long Beach, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 8, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1285922310) · Data from the CMS NPPES public registry.