Gretchen Metzenberg, D.O.
Pediatrics Physician · Los Angeles, CA
Gretchen Metzenberg, D.O. is a pediatrics physician with a practice address in Los Angeles, California, and NPI 1437531977, issued on Jun 21, 2015. Check the license (California 20A18648, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gretchen Metzenberg
- Credential
- D.O.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License numbers
- 20A18648 CA
OT016722 PA
Self-reported in NPPES; status is on the state search - Practice location
- 4650 W Sunset Blvd, Los Angeles, CA 90027
- Phone
- (323) 660-2450
- Enumerated
- Jun 21, 2015
- Record last updated
- Feb 27, 2023
- Medicare enrollment
- Enrolled (PECOS I20231120001697); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Also registered at 4650 W Sunset Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Ahmed AbuhamadStudent in an Organized Health Care Education/Training Program1386478915
- Joanna Aceto, D.D.S.Pediatric Dentistry1033522578
- Etai Adam, M.D.Pediatrics Physician1578811998
Verify Gretchen Metzenberg in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A18648Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Ucsf Pediatrics AssociatesSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gretchen Metzenberg among 9,272 pediatrics physician records in California
Gretchen Metzenberg, D.O. is one of 9,272 pediatrics physician records with a practice address in California. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 78% of them.
- NPI issued2015 · 78% of these records are older, 19% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated2015 · median 2012 among the 754 with a school on file
- Record last updated2023 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
919 pediatrics physician records list a practice address in Los Angeles
They are 919 of the 69,537 NPPES records with a practice address in Los Angeles, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Los Angeles → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Lamis Al-Ahmad, M.D.Los Angeles, CA 900271356445522
- Eyal Ben-Isaac, MDLos Angeles, CA 900271689779597
- Clement Cheung, M.D., PH.D.Los Angeles, CA 900271437165826
- Edward Epstein, M.D.Los Angeles, CA 900271568420768
- Joyce Javier, MDLos Angeles, CA 900271033172754
- Richard Ko, M.D.Los Angeles, CA 900271003841693
- Jill Lekovic, M.D.Los Angeles, CA 900271265543185
- Kanokporn Mongkolrattanothai, MDLos Angeles, CA 900271174592950
Common questions
What is Gretchen Metzenberg, D.O.'s NPI number?
Gretchen Metzenberg, D.O.'s National Provider Identifier (NPI) is 1437531977, issued on Jun 21, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Gretchen Metzenberg, D.O. located?
The NPPES record lists a practice address at 4650 W Sunset Blvd, Los Angeles, CA, 90027. Phone: (323) 660-2450. Providers update this record themselves, so call before visiting.
How can I verify Gretchen Metzenberg, D.O.'s license?
NPPES lists California license number 20A18648, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.