Khai Do, M.D.
Internal Medicine Physician · Santa Ana, CA
Khai Do, M.D. is an internal medicine physician with a practice address in Santa Ana, California, and NPI 1396939526, issued on Aug 30, 2007. Check the license (California A42932, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Khai Do
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A42932 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2021 E 4TH St Ste 104, Santa Ana, CA 92705
- Phone
- (909) 621-3012
- Enumerated
- Aug 30, 2007
- Record last updated
- Jun 23, 2026
- Fax
- (909) 621-3015
- Medicare enrollment
- Enrolled (PECOS I20110505000300); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 1985
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Khai Do in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A42932Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average internal medicine physician in 2024
10,461 Medicare Part D claims for 396 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims.
Most prescribed
- Losartan Potassium717 claims
- Atorvastatin Calcium670 claims
- Metformin Hcl366 claims
- Amlodipine Besylate356 claims
- Gabapentin324 claims
- Jardiance307 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.
Industry payments in 2024: $1,440.09
58 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Thien Phuoc Medical Center IncWestminster, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Khai Do among 17,696 internal medicine physician records in California
Khai Do, 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 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
- Graduated1985 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Santa Ana → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Frank Badin, M.D.Santa Ana, CA 927051962562850
- Richard Bock, M.D.Santa Ana, CA 927051699118216
- Jane Curtis, M.D.Santa Ana, CA 927051518018217
- Xinming Fu, MDSanta Ana, CA 927051255381232
- Diane Kim, MDSanta Ana, CA 927051598824252
- Erica Kuhn, DONorth Tustin, CA 927051710095237
- David Maclachlan, MDSanta Ana, CA 927051114430402
- Venkata Pulakanti, M.D.Santa Ana, CA 927051356521843
Common questions
What is Khai Do, M.D.'s NPI number?
Khai Do, M.D.'s National Provider Identifier (NPI) is 1396939526, issued on Aug 30, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Khai Do, M.D. located?
The NPPES record lists a practice address at 2021 E 4TH St Ste 104, Santa Ana, CA, 92705. Phone: (909) 621-3012. Providers update this record themselves, so call before visiting.
How can I verify Khai Do, M.D.'s license?
NPPES lists California license number A42932, 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 Khai Do, M.D. prescribe under Medicare Part D?
In 2024, Khai Do, M.D. had 10,461 Medicare Part D claims for 396 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.