David Zachary Harrison, M.D.
Emergency Medicine Physician · Los Angeles, CA
David Zachary Harrison, M.D. is an emergency medicine physician with a practice address in Los Angeles, California, and NPI 1104189000, issued on Jun 17, 2012. Check the license (California A127729, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- David Zachary Harrison
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A127729 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 N State St, Los Angeles, CA 90089
- Phone
- (323) 409-9000
- Enumerated
- Jun 17, 2012
- Record last updated
- May 7, 2024
- Medicare enrollment
- Enrolled (PECOS I20151125001904); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1200 N State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Lily Adler, MDStudent in an Organized Health Care Education/Training Program1164281309
- Samantha Adwani, MDStudent in an Organized Health Care Education/Training Program1396683892
- Kimiko AgariOral & Maxillofacial Surgery (D.M.D.)1043665219
Verify David Zachary Harrison in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A127729Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average emergency medicine physician in 2024
138 Medicare Part D claims for 103 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 17 claims were for opioids.
Most prescribed
- Ondansetron Odt16 claims
- Hydrocodone-Acetaminophen15 claims
- Cefadroxil14 claims
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.
The practice group's MIPS final score for 2023 (Medicare payment program): 91.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Southern California Permanente Medical GroupPanorama City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Zachary Harrison among 7,751 emergency medicine physician records in California
David Zachary Harrison, M.D. 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 2012, is newer than 63% of them.
- NPI issued2012 · 63% of these records are older, 34% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated2012 · median 2011 among the 4,560 with a school on file
- Record last updated2024 · 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
- Robert AllenLos Angeles, CA 900891528562469
- Eduardo Borquez, M.D.Los Angeles, CA 900891497935134
- Joseph Choi, MD, MPHLos Angeles, CA 900891902087497
- David Diller, M.D.Los Angeles, CA 900891801187398
- Dennis Espitia, M.D.Los Angeles, CA 900891669654380
- Jennifer Huang, D.O.Los Angeles, CA 900891275708588
- Vanessa Kreger, M.D.Los Angeles, CA 900891467849604
- Mizuho Morrison, DOLos Angeles, CA 900891508008335
Common questions
What is David Zachary Harrison, M.D.'s NPI number?
David Zachary Harrison, M.D.'s National Provider Identifier (NPI) is 1104189000, issued on Jun 17, 2012. An NPI identifies a provider in billing; it is not a license.
Where is David Zachary Harrison, M.D. located?
The NPPES record lists a practice address at 1200 N State St, Los Angeles, CA, 90089. Phone: (323) 409-9000. Providers update this record themselves, so call before visiting.
How can I verify David Zachary Harrison, M.D.'s license?
NPPES lists California license number A127729, 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 David Zachary Harrison, M.D. prescribe under Medicare Part D?
In 2024, David Zachary Harrison, M.D. had 138 Medicare Part D claims for 103 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is David Zachary Harrison, M.D.'s MIPS final score?
The 2023 MIPS final score is 91.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.