Keith J. Lee, MD
Internal Medicine Physician · Irvine, CA
Keith J. Lee, MD is an internal medicine physician with a practice address in Irvine, California, and NPI 1699766188, issued on Nov 2, 2005. Check the license (California G52059, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Keith J. Lee
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G52059 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4050 Barranca Pkwy, Irvine, CA 92604
- Phone
- (949) 551-1090
- Enumerated
- Nov 2, 2005
- Record last updated
- Oct 13, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (949) 262-5500
- Medicaid ID
- 00G520590 CA
- Medicare enrollment
- Enrolled (PECOS I20100315000374); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1979
- 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 4050 Barranca Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Barton Billeci, MDAdolescent Medicine (Internal Medicine) Physician1154407237
- Jon Biorkman, MDFamily Medicine Physician1023008679
- Betty Chen, D.D.S., M.S.Orthodontics and Dentofacial Orthopedics Dentistry1902173362
Verify Keith J. Lee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G52059Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average internal medicine physician in 2024
7,942 Medicare Part D claims for 505 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 289 claims were for opioids.
Most prescribed
- Atorvastatin Calcium586 claims
- Levothyroxine Sodium284 claims
- Lisinopril271 claims
- Losartan Potassium246 claims
- Amlodipine Besylate221 claims
- Pantoprazole Sodium217 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: $2,172.38
76 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, 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
- Memorialcare Medical FoundationAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Keith J. Lee among 17,696 internal medicine physician records in California
Keith J. Lee, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1979 · median 2004 among the 11,065 with a school on file
- Record last updated2015 · 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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- Linda Alimadadian, DOIrvine, CA 926041891711065
- Chienwei Chen, MDIrvine, CA 926041992795256
- Mahdieh Fallahtafti, D.O.Irvine, CA 926041700802998
- Kalena Hwang, M.D.Irvine, CA 926041225088164
- Grace Lozinski, M.D.Irvine, CA 926041659399582
- Alex Lu, MDIrvine, CA 926041144211350
Common questions
What is Keith J. Lee, MD's NPI number?
Keith J. Lee, MD's National Provider Identifier (NPI) is 1699766188, issued on Nov 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Keith J. Lee, MD located?
The NPPES record lists a practice address at 4050 Barranca Pkwy, Irvine, CA, 92604. Phone: (949) 551-1090. Providers update this record themselves, so call before visiting.
How can I verify Keith J. Lee, MD's license?
NPPES lists California license number G52059, 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 Keith J. Lee, MD prescribe under Medicare Part D?
In 2024, Keith J. Lee, MD had 7,942 Medicare Part D claims for 505 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.