Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. William Sidney Warren Jr., MD

Individual provider Addiction Medicine (Anesthesiology) Physician · NPI 1467547984

Dr. William Sidney Warren Jr., MD is an Addiction Medicine (Anesthesiology) Physician in Little Rock, Arkansas. Practices as a sole proprietor. Licensed in Arkansas.

Licensed in
AR
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

425 W Capitol Ave Ste 1535
Little Rock, AR 72201-3521
Phone: (501) 448-6663
Fax: (501) 448-6663
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Addiction Medicine (Anesthesiology) Physician (primary) Taxonomy 207LA0401X · Licence C6145 (AR)

Record details

NPI number1467547984
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedOctober 3, 2006
Last updated in NPPESJune 24, 2023
Certification dateJune 24, 2023