William Ang Lee, MD - Medicare Internal Medicine in Simi Valley, CA

William Ang Lee, MD is a medicare enrolled "Internal Medicine" physician in Simi Valley, California. He graduated from medical school in 2001 and has 23 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Simi Medical Group, Inc and his current practice location is 2755 Alamo St Ste 101, Simi Valley, California. You can reach out to his office (for appointments etc.) via phone at (818) 726-1930.

William Ang Lee is licensed to practice in California (license number C50628) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1619960705.

Contact Information

William Ang Lee, MD
2755 Alamo St Ste 101,
Simi Valley, CA 93065
(818) 726-1930
(818) 878-1563

Map and Direction




Physician's Profile

Full NameWilliam Ang Lee
GenderMale
SpecialityInternal Medicine
Experience23 Years
Location2755 Alamo St Ste 101, Simi Valley, California
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William Ang Lee graduated from medical school in 2001
  NPI Data:
  • NPI Number: 1619960705
  • Provider Enumeration Date: 08/24/2005
  • Last Update Date: 07/11/2018
  Medicare PECOS Information:
  • PECOS PAC ID: 4284682659
  • Enrollment ID: I20050112000459

Medical Identifiers

Medical identifiers for William Ang Lee such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1619960705NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine C50628 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Adventist Health Simi ValleySimi valley, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Simi Medical Group, Inc88203517862

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. William Ang Lee allows following entities to bill medicare on his behalf.
Entity NameSimi Medical Group, Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346768025
PECOS PAC ID: 8820351786
Enrollment ID: O20180406001689

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William Ang Lee is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
William Ang Lee, MD
2755 Alamo St Ste 101,
Simi Valley, CA 93065-1311

Ph: (818) 726-1930
William Ang Lee, MD
2755 Alamo St Ste 101,
Simi Valley, CA 93065

Ph: (818) 726-1930

Reviews and Comments


Internal Medicine Doctors in Simi Valley, CA

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Dr. Melissa Jill Cohen, M.D.
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Phone: 805-583-0110    

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.