Chit Su Wai, MD
Internal Medicine Physician · Irvine, CA
Chit Su Wai, MD is an internal medicine physician with a practice address in Irvine, California, and NPI 1780015438, issued on Dec 5, 2013. Check the license (California A127042, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chit Su Wai
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A127042 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11 Technology Dr, Irvine, CA 92618
- Phone
- (949) 923-3200
- Enumerated
- Dec 5, 2013
- Record last updated
- Jan 14, 2026
- Medicare enrollment
- Enrolled (PECOS I20140922000399); 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 11 Technology Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Teresa Agner, MDInternal Medicine Physician1013087410
- Ali Ahoui, MDHospitalist Physician1093964769
- Nidal Al Hannat, M.D.Internal Medicine Physician1235335563
- Richard AppelInternal Medicine Physician1336225044
- Juan Cabrera, M.D.Internal Medicine Physician1447254792
- Houman Danesh, M.D.Internal Medicine Physician1205027802
Verify Chit Su Wai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A127042Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average internal medicine physician in 2024
92 Medicare Part D claims for 54 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
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
- Healthcare Partners Affiliates Medical GroupAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Chit Su Wai among 17,696 internal medicine physician records in California
Chit Su Wai, 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 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2006 · 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
- Savitha Bharadwaj, M.D.Irvine, CA 926181760470926
- Juan Cabrera, M.D.Irvine, CA 926181447254792
- William Chen, M.D.Irvine, CA 926181881659142
- Subrato Ghosh, MDIrvine, CA 926181083607055
- Kambiz Karimi, M.D.Irvine, CA 926181184688475
- Sara Kim, M.D.Irvine, CA 926181912944166
- Brian Lo, MDIrvine, CA 926181073501565
- Emad Mikhail, MDIrvine, CA 926181376582957
Common questions
What is Chit Su Wai, MD's NPI number?
Chit Su Wai, MD's National Provider Identifier (NPI) is 1780015438, issued on Dec 5, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Chit Su Wai, MD located?
The NPPES record lists a practice address at 11 Technology Dr, Irvine, CA, 92618. Phone: (949) 923-3200. Providers update this record themselves, so call before visiting.
How can I verify Chit Su Wai, MD's license?
NPPES lists California license number A127042, 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 Chit Su Wai, MD prescribe under Medicare Part D?
In 2024, Chit Su Wai, MD had 92 Medicare Part D claims for 54 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.