Joseph Hwang, M.D.
Emergency Medicine Physician · Lancaster, CA
Joseph Hwang, M.D. is an emergency medicine physician with a practice address in Lancaster, California, and NPI 1871767244, issued on Apr 16, 2008. Check the license (California A97997, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joseph Hwang
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A97997 CA
Self-reported in NPPES; status is on the state search - Practice location
- 43830 10TH St W, Lancaster, CA 93534
- Phone
- (661) 948-4781
- Enumerated
- Apr 16, 2008
- Record last updated
- Dec 6, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 43830 10TH St W
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Oluwadamilola AderibigbeNurse Practitioner1063133387
- Michael Burr, M.D.Anesthesiology Physician1124053939
- Gustavo Casas, DPTPhysical Therapist1033698808
- Ilder Cervantes SanchezNurse's Aide1285459727
- Yong Chung, M,D,Anesthesiology Physician1881625135
- Mary Garcia-Casas, PTPhysical Therapist1700365574
Verify Joseph Hwang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A97997Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average emergency medicine physician in 2024
231 Medicare Part D claims for 142 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 31 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen27 claims
- Ondansetron Odt16 claims
- Omeprazole14 claims
- Prednisone14 claims
- Azithromycin12 claims
- Cefadroxil11 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.
Joseph Hwang among 7,751 emergency medicine physician records in California
Joseph Hwang, 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 2008, is newer than 50% of them.
- NPI issued2008 · 50% of these records are older, 46% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2021 · 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 Lancaster → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Frederic Auerbach, MDLancaster, CA 935341023074713
- Mark Brown, MDLancaster, CA 935341336105675
- Frank Detrana, MDLancaster, CA 935341043275407
- Travis Deuson, MDLancaster, CA 935341598720963
- Diane Kehrli, NPLancaster, CA 935341174581532
- Thomas Lee, MDLancaster, CA 935341194781898
- Michael Leidner, MDLancaster, CA 935341538124987
- Andrew Lesser, M.D.Lancaster, CA 935341952326381
Common questions
What is Joseph Hwang, M.D.'s NPI number?
Joseph Hwang, M.D.'s National Provider Identifier (NPI) is 1871767244, issued on Apr 16, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Joseph Hwang, M.D. located?
The NPPES record lists a practice address at 43830 10TH St W, Lancaster, CA, 93534. Phone: (661) 948-4781. Providers update this record themselves, so call before visiting.
How can I verify Joseph Hwang, M.D.'s license?
NPPES lists California license number A97997, 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 Joseph Hwang, M.D. prescribe under Medicare Part D?
In 2024, Joseph Hwang, M.D. had 231 Medicare Part D claims for 142 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.