William Ang Lee, MD
Internal Medicine Physician · Simi Valley, CA
William Ang Lee, MD is an internal medicine physician with a practice address in Simi Valley, California, and NPI 1619960705, issued on Aug 24, 2005. Check the license (California C50628, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- William Ang Lee
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- C50628 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2755 Alamo St Ste 101, Simi Valley, CA 93065
- Phone
- (818) 726-1930
- Enumerated
- Aug 24, 2005
- Record last updated
- Jul 11, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (818) 878-1563
- Medicare enrollment
- Enrolled (PECOS I20050112000459); accepts Medicare assignment
- 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 2755 Alamo St Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mine Moosakhanian, FNP-CPrimary Care Nurse Practitioner1881310761
- Deepa Reddy, M.D.Family Medicine Physician1609929397
- Kelly Stephens, RN, NPNurse Practitioner1144543695
Verify William Ang Lee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C50628Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average internal medicine physician in 2024
10,025 Medicare Part D claims for 714 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. 82 claims were for opioids.
Most prescribed
- Atorvastatin Calcium507 claims
- Rosuvastatin Calcium398 claims
- Levothyroxine Sodium385 claims
- Amlodipine Besylate354 claims
- Metformin Hcl299 claims
- Lisinopril262 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: $1,566.14
65 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
- Simi Medical Group, IncSimi Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Ang Lee among 17,696 internal medicine physician records in California
William Ang 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
- Graduated2001 · median 2004 among the 11,065 with a school on file
- Record last updated2018 · 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).
25 internal medicine physician records list a practice address in Simi Valley
They are 25 of the 1,397 NPPES records with a practice address in Simi Valley, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Simi Valley → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- George Dichter, M.D.Simi Valley, CA 930651841265261
- Gurdip Flora, M.DSimi Valley, CA 930651164611075
- Chandrashekhar Joshi, MDSimi Valley, CA 930651215049374
- Charles Kennedy, MDSimi Valley, CA 930651942576111
- Mojgan Makhsoosi, M.D. INC.Simi Valley, CA 930651346218658
- Smita Mandal, M.D.Simi Valley, CA 930651285876854
- William Matzner, M.D., PH.D.Simi Valley, CA 930651306905716
- Abdol Memar-Zia, MDSimi Valley, CA 930651639122112
Common questions
What is William Ang Lee, MD's NPI number?
William Ang Lee, MD's National Provider Identifier (NPI) is 1619960705, issued on Aug 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Ang Lee, MD located?
The NPPES record lists a practice address at 2755 Alamo St Ste 101, Simi Valley, CA, 93065. Phone: (818) 726-1930. Providers update this record themselves, so call before visiting.
How can I verify William Ang Lee, MD's license?
NPPES lists California license number C50628, 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 William Ang Lee, MD prescribe under Medicare Part D?
In 2024, William Ang Lee, MD had 10,025 Medicare Part D claims for 714 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.