GRETCHEN METZENBERG D.O.
NPI 1437531977
Pediatrics in Los Angeles, CA
About Gretchen Metzenberg D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRETCHEN METZENBERG D.O. (NPI 1437531977) is an individual pediatrics provider in Los Angeles, California, licensed in California (20A18648) and active in the NPI registry since June 2015. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Gretchen Metzenberg D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Gretchen Metzenberg reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 1,159 clinicians in this Medicare group
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94122
- Reassigned Medicare billing, California enrollment
- 5,544 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 Gretchen Metzenberg's NPI number?
The NPI number for Gretchen Metzenberg is 1437531977. It was assigned to this individual provider in the NPPES registry on June 21, 2015.
Where is Gretchen Metzenberg located?
Gretchen Metzenberg practices at 4650 W Sunset Blvd, Los Angeles, CA 90027. The listed phone number is (323) 660-2450.
What is Gretchen Metzenberg's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Gretchen Metzenberg enrolled in Medicare?
Yes. Gretchen Metzenberg is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Gretchen Metzenberg's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gretchen Metzenberg reassigns Medicare benefits to 3 organizations: Ucsf Pediatrics Associates (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, 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 Gretchen Metzenberg'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 Gretchen Metzenberg was last updated on February 27, 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.
# Gretchen Metzenberg, D.O. · NPI 1437531977
Pediatrics physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since June 21, 2015.
## Identity
- **NPI:** 1437531977 (Entity type: Individual)
- **Enumerated:** June 21, 2015
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 20A18648 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 4650 W SUNSET BLVD, Los Angeles, CA 90027-6062
- **Phone:** (323) 660-2450
## 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): Ucsf Pediatrics Associates (NPI 1376614016, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** February 27, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1437531977) · Data from the CMS NPPES public registry.