MATTHEW S KEEFER MD
NPI 1972609352
Pediatrics in Los Angeles, CA
About Matthew S Keefer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MATTHEW S KEEFER MD (NPI 1972609352) is an individual pediatrics provider in Los Angeles, California, licensed in California (A74609) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Matthew S Keefer Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Matthew Keefer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
- 1,281 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 90027 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 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
LOS ANGELES, CA 90027
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 Matthew Keefer's NPI number?
The NPI number for Matthew Keefer is 1972609352. It was assigned to this individual provider in the NPPES registry on September 15, 2006.
Where is Matthew Keefer located?
Matthew Keefer practices at 4650 W Sunset Blvd, Los Angeles, CA 90027. The listed phone number is (323) 669-2534.
What is Matthew Keefer's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Matthew Keefer enrolled in Medicare?
Yes. Matthew Keefer is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Matthew Keefer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Matthew Keefer reassigns Medicare benefits to Children's Hospital Los Angeles Medical Group, Inc. (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 Matthew Keefer'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 Matthew Keefer was last updated on October 4, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Matthew S Keefer, MD · NPI 1972609352
Pediatrics physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since September 15, 2006.
## Identity
- **NPI:** 1972609352 (Entity type: Individual)
- **Enumerated:** September 15, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** A74609 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4650 W SUNSET BLVD, Los Angeles, CA 90027-6062
- **Phone:** (323) 669-2534 · **Fax:** (323) 663-6707
## 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:** Children's Hospital Los Angeles Medical Group, Inc. (NPI 1265530653, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 4, 2023
- **Other identifiers:** Medicaid 00A746090 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1972609352) · Data from the CMS NPPES public registry.