Gary T. Lai, M.D.
Internal Medicine Physician · Chino, CA
Gary T. Lai, M.D. is an internal medicine physician with a practice address in Chino, California, and NPI 1245332220, issued on Sep 1, 2006. Check the license (California A65030, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gary T. Lai
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A65030 CA
Self-reported in NPPES; status is on the state search - Practice location
- 14335 Pipeline Ave, Chino, CA 91710
- Phone
- (909) 548-3888
- Enumerated
- Sep 1, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (909) 548-3999
- Medicaid ID
- 00A650300 CA
- Medicare enrollment
- Enrolled (PECOS I20070214000171); may accept Medicare assignment
- Medical or professional school
- Warren Alpert Medical School Of Brown University, 1996
- 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 14335 Pipeline Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Gary T. Lai in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A65030Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
27% more Medicare Part D claims than the average internal medicine physician in 2024
4,048 Medicare Part D claims for 355 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.
Most prescribed
- Amlodipine Besylate348 claims
- Atorvastatin Calcium284 claims
- Losartan Potassium224 claims
- Metformin Hcl197 claims
- Rosuvastatin Calcium126 claims
- Levothyroxine Sodium116 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: $48.81
2 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, 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.
Gary T. Lai among 17,696 internal medicine physician records in California
Gary T. Lai, 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
- Graduated1996 · 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).
16 internal medicine physician records list a practice address in Chino
They are 16 of the 1,097 NPPES records with a practice address in Chino, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Chino → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jonathan Cho, M.D.Chino, CA 917101235175936
- Robert Clinton, M.D.Chino, CA 917101265566699
- Ali Etemadian, D.O.Chino, CA 917101316041718
- Mao-Jin Fu, M.D.Chino, CA 917101568680395
- Gerardo General, MDChino, CA 917101649295635
- Tuan Hoang, MDChino, CA 917101013122761
- Yenchih Lin, MDChino, CA 917101891884011
- Jose Lira, M.D.Chino, CA 917101821038985
Common questions
What is Gary T. Lai, M.D.'s NPI number?
Gary T. Lai, M.D.'s National Provider Identifier (NPI) is 1245332220, issued on Sep 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gary T. Lai, M.D. located?
The NPPES record lists a practice address at 14335 Pipeline Ave, Chino, CA, 91710. Phone: (909) 548-3888. Providers update this record themselves, so call before visiting.
How can I verify Gary T. Lai, M.D.'s license?
NPPES lists California license number A65030, 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 Gary T. Lai, M.D. prescribe under Medicare Part D?
In 2024, Gary T. Lai, M.D. had 4,048 Medicare Part D claims for 355 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.