Nicholas Herzik
Emergency Medicine Physician · Los Angeles, CA
Nicholas Herzik is an emergency medicine physician with a practice address in Los Angeles, California, and NPI 1740921931, issued on Apr 5, 2022. Check the license (California A189910, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Nicholas Herzik
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A189910 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2051 Marengo St, Los Angeles, CA 90033
- Phone
- (323) 409-1000
- Enumerated
- Apr 5, 2022
- Record last updated
- Jul 21, 2026
- Medicare enrollment
- Enrolled (PECOS I20260225001549); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 2051 Marengo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Shalleymar AgitoRegistered Respiratory Therapist1649850694
- Adolfo AguilarCritical Care Registered Respiratory Therapist1053836999
- Ashley Allen, MDEmergency Medicine Physician1053751875
Verify Nicholas Herzik in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A189910Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average emergency medicine physician in 2024
39 Medicare Part D claims for 26 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Cep America - CaliforniaBakersfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nicholas Herzik among 7,751 emergency medicine physician records in California
Nicholas Herzik is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 95% of them.
- NPI issued2022 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2022 · median 2011 among the 4,560 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Los Angeles → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Deirdre Anglin, MDLos Angeles, CA 900331306932025
- Joseph BaltrushesLos Angeles, CA 900331629152178
- Aaron Bright, M.D.Los Angeles, CA 900331023054087
- Christopher Celentano, MDLos Angeles, CA 900331972516417
- Christine DinuzzoLos Angeles, CA 900331952456741
- Marc Eckstein, M.D.Los Angeles, CA 900331922010867
- Sean Henderson, M.D.Los Angeles, CA 900331205887064
- Helen Ho, MDLos Angeles, CA 900331447208962
Common questions
What is Nicholas Herzik's NPI number?
Nicholas Herzik's National Provider Identifier (NPI) is 1740921931, issued on Apr 5, 2022. An NPI identifies a provider in billing; it is not a license.
Where is Nicholas Herzik located?
The NPPES record lists a practice address at 2051 Marengo St, Los Angeles, CA, 90033. Phone: (323) 409-1000. Providers update this record themselves, so call before visiting.
How can I verify Nicholas Herzik's license?
NPPES lists California license number A189910, 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.
How much does Nicholas Herzik prescribe under Medicare Part D?
In 2024, Nicholas Herzik had 39 Medicare Part D claims for 26 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.