DR. ANDREW RICHARD WILLIAMS M.D.
NPI 1245641869
Internal Medicine in Pasadena, CA
About Dr. Andrew Richard Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANDREW RICHARD WILLIAMS M.D. (NPI 1245641869) is an individual internal medicine provider in Pasadena, California, licensed in California (A135707) and active in the NPI registry since May 2014. He is enrolled in Medicare PECOS and is a graduate of Other (2013).
NPPES Registry Identity
Specialties & Licenses
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Andrew Richard Williams M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91105 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
PASADENA, CA 91105
PASADENA, CA 91105
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Andrew Williams's NPI number?
The NPI number for Andrew Williams is 1245641869. It was assigned to this individual provider in the NPPES registry on May 16, 2014.
Where is Andrew Williams located?
Andrew Williams practices at 100 W California Blvd, Pasadena, CA 91105. The listed phone number is (626) 397-5000.
What is Andrew Williams's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Andrew Williams enrolled in Medicare?
Yes. Andrew Williams is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
When was this NPI record last updated?
The NPPES record for Andrew Williams was last updated on January 15, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.
