Warren Chilun Hung, MD
Internal Medicine Physician · Irvine, CA
Warren Chilun Hung, MD is an internal medicine physician with a practice address in Irvine, California, and NPI 1770621260, issued on Feb 5, 2007. Check the license (California A55808, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Warren Chilun Hung
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A55808 CA
Self-reported in NPPES; status is on the state search - Practice location
- 14150 Culver Drive, Irvine, CA 92604
- Phone
- (949) 559-1496
- Enumerated
- Feb 5, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (949) 559-1492
- Medicaid ID
- 00A558080 CA
- Medicare enrollment
- Enrolled (PECOS I20070511000374); 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 14150 Culver Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Paskil, MDFamily Medicine Physician1942228697
Verify Warren Chilun Hung in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A55808Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% more Medicare Part D claims than the average internal medicine physician in 2024
5,639 Medicare Part D claims for 412 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims.
Most prescribed
- Amlodipine Besylate609 claims
- Metoprolol Succinate604 claims
- Atorvastatin Calcium585 claims
- Losartan Potassium354 claims
- Alendronate Sodium286 claims
- Triamcinolone Acetonide161 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.
Warren Chilun Hung among 17,696 internal medicine physician records in California
Warren Chilun Hung, MD 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1991 · median 2004 among the 11,065 with a school on file
- Record last updated2007 · 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).
155 internal medicine physician records list a practice address in Irvine
They are 155 of the 7,778 NPPES records with a practice address in Irvine, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Irvine → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Chienwei Chen, MDIrvine, CA 926041992795256
- Mahdieh Fallahtafti, D.O.Irvine, CA 926041700802998
- Kalena Hwang, M.D.Irvine, CA 926041225088164
- Keith Lee, MDIrvine, CA 926041699766188
- Grace Lozinski, M.D.Irvine, CA 926041659399582
Common questions
What is Warren Chilun Hung, MD's NPI number?
Warren Chilun Hung, MD's National Provider Identifier (NPI) is 1770621260, issued on Feb 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Warren Chilun Hung, MD located?
The NPPES record lists a practice address at 14150 Culver Drive, Irvine, CA, 92604. Phone: (949) 559-1496. Providers update this record themselves, so call before visiting.
How can I verify Warren Chilun Hung, MD's license?
NPPES lists California license number A55808, 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 Warren Chilun Hung, MD prescribe under Medicare Part D?
In 2024, Warren Chilun Hung, MD had 5,639 Medicare Part D claims for 412 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.