William Hung
Internal Medicine Physician · El Monte, CA
William Hung is an internal medicine physician with a practice address in El Monte, California, and NPI 1972615771, issued on Aug 31, 2006. Check the license (California A79596, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Hung
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A79596 CA
Self-reported in NPPES; status is on the state search - Practice location
- 10953 Ramona Blvd, El Monte, CA 91731
- Phone
- (626) 579-8463
- Enumerated
- Aug 31, 2006
- Record last updated
- Aug 7, 2025
- Medicare enrollment
- Enrolled (PECOS I20050627000433); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 10953 Ramona Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gloria Aguilar, REGISTER NURSEAmbulatory Care Registered Nurse1043740731
- Sandra AlarconLicensed Vocational Nurse1952160756
- Juliana Alcaraz, RNRegistered Nurse1235902776
- Sonia Aleman, RNRegistered Nurse1023875853
- Everdina AlisangcoPediatrics Physician1649382219
- Joseph Allevato, MDFamily Medicine Physician1922148790
Verify William Hung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A79596Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,897 Medicare Part D claims for 135 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Atorvastatin Calcium148 claims
- Metformin Hcl129 claims
- Gabapentin122 claims
- Amlodipine Besylate99 claims
- Losartan Potassium88 claims
- Glipizide70 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.
Bills Medicare through one group practice
- County OF Los AngelesEl Monte, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Hung among 17,696 internal medicine physician records in California
William Hung is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2004 among the 11,065 with a school on file
- Record last updated2025 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 internal medicine physician records list a practice address in El Monte
They are 25 of the 1,528 NPPES records with a practice address in El Monte, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in El Monte → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Afshin Adhami, MDEl Monte, CA 917311104991686
- Charlie ChanEl Monte, CA 917311396857348
- Sandar Chen, MDEl Monte, CA 917311255747069
- Julia ChinEl Monte, CA 917311326336264
- Jasmine ChwaEl Monte, CA 917311831201805
- Alvin KongEl Monte, CA 917311750480760
- Justin LeeEl Monte, CA 917311346344728
- Stanley LeongEl Monte, CA 917311043322936
Common questions
What is William Hung's NPI number?
William Hung's National Provider Identifier (NPI) is 1972615771, issued on Aug 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Hung located?
The NPPES record lists a practice address at 10953 Ramona Blvd, El Monte, CA, 91731. Phone: (626) 579-8463. Providers update this record themselves, so call before visiting.
How can I verify William Hung's license?
NPPES lists California license number A79596, 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 William Hung prescribe under Medicare Part D?
In 2024, William Hung had 1,897 Medicare Part D claims for 135 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.