Kalena K. Hwang, M.D.
Internal Medicine Physician · Irvine, CA
Kalena K. Hwang, M.D. is an internal medicine physician with a practice address in Irvine, California, and NPI 1225088164, issued on May 11, 2006. Check the license (California A89575, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Kalena K. Hwang
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A89575 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2 Osborn St Ste 180, Irvine, CA 92604
- Phone
- (949) 417-9820
- Enumerated
- May 11, 2006
- Record last updated
- Jan 16, 2026
- Fax
- (949) 417-9830
- Medicare enrollment
- Enrolled (PECOS I20060511000155); accepts Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2003
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2 Osborn St Ste 180
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Amanda Binns, M.D.Internal Medicine Physician1205105913
- Katherine Matsumoto, FNP-BCFamily Nurse Practitioner1003322306
- Nancy Murray, PA-CPhysician Assistant1619117843
- Marie J. Renella, PA-CPhysician Assistant1053645333
- Kelly Wong, M.D.Family Medicine Physician1932289824
- Ronald Young, MDFamily Medicine Physician1740221746
Verify Kalena K. Hwang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A89575Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
57% more Medicare Part D claims than the average internal medicine physician in 2024
4,987 Medicare Part D claims for 457 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 45 claims were for opioids.
Most prescribed
- Atorvastatin Calcium443 claims
- Amlodipine Besylate304 claims
- Levothyroxine Sodium238 claims
- Lisinopril225 claims
- Rosuvastatin Calcium202 claims
- Alendronate Sodium167 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
- Irvine Family Care Inc.Irvine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kalena K. Hwang among 17,696 internal medicine physician records in California
Kalena K. Hwang, M.D. 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
- Graduated2003 · median 2004 among the 11,065 with a school on file
- Record last updated2026 · 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
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- Keith Lee, MDIrvine, CA 926041699766188
- Grace Lozinski, M.D.Irvine, CA 926041659399582
- Alex Lu, MDIrvine, CA 926041144211350
Common questions
What is Kalena K. Hwang, M.D.'s NPI number?
Kalena K. Hwang, M.D.'s National Provider Identifier (NPI) is 1225088164, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kalena K. Hwang, M.D. located?
The NPPES record lists a practice address at 2 Osborn St Ste 180, Irvine, CA, 92604. Phone: (949) 417-9820. Providers update this record themselves, so call before visiting.
How can I verify Kalena K. Hwang, M.D.'s license?
NPPES lists California license number A89575, 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 Kalena K. Hwang, M.D. prescribe under Medicare Part D?
In 2024, Kalena K. Hwang, M.D. had 4,987 Medicare Part D claims for 457 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.