DR. WILLIAM SIDNEY WARREN JR. M.D.
NPI 1467547984
Anesthesiology - Addiction Medicine in Little Rock, AR

Q: What is William Warren's NPI number?

The NPI number for William Warren is 1467547984. It was assigned to this individual provider in the NPPES registry on October 3, 2006.

Q: What is William Warren's specialty?

The primary specialty registered for this NPI is Anesthesiology, specializing in Addiction Medicine, with taxonomy code 207LA0401X.

Q: When was this NPI record last updated?

The NPPES record for William Warren was last updated on June 24, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since October 03, 2006

425 W CAPITOL AVE STE 1535, LITTLE ROCK, AR 72201(501) 448-6663(501) 448-6663 Get Directions Write a Review

NPPES record last updated: June 24, 2023. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jun 24, 2023, Nov 1, 2019, Jul 3, 2019 (3 updates tracked since 2019).

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About Dr. William Sidney Warren Jr. M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM SIDNEY WARREN JR. M.D. (NPI 1467547984) is an individual addiction medicine provider in Little Rock, Arkansas, licensed in Arkansas (C6145) and active in the NPI registry since October 2006.

NPPES Registry Identity

NPI1467547984

Entity TypeIndividualMale

Primary Taxonomy207LA0401X

Provider Legal NameDR. WILLIAM SIDNEY WARREN JR.Credential: M.D.

Location Address425 W CAPITOL AVE STE 1535Little Rock, AR 72201-3521

Mailing Address425 W Capitol Ave Ste 1535Little Rock, AR 72201-3521 · (501) 448-6663 · Fax (501) 448-6663

Phone(501) 448-6663

Fax(501) 448-6663

Sole ProprietorYes

Enumeration DateOctober 3, 2006

Last NPPES UpdateJune 24, 20233 updates tracked since enumeration

NPPES CertifiedJune 24, 2023

✔ NPI 1467547984 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiology · Addiction MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207LA0401X

License✔ Licensed in AR · C6145

Definition

An anesthesiologist who specializes in the diagnosis and treatment of addictions.

425 W CAPITOL AVE STE 1535, Little Rock, AR 72201

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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 William Warren's NPI number?

The NPI number for William Warren is 1467547984. It was assigned to this individual provider in the NPPES registry on October 3, 2006.

Where is William Warren located?

William Warren practices at 425 W Capitol Ave Ste 1535, Little Rock, AR 72201. The listed phone number is (501) 448-6663.

What is William Warren's specialty?

The primary specialty registered for this NPI is Anesthesiology, specializing in Addiction Medicine, with taxonomy code 207LA0401X.

When was this NPI record last updated?

The NPPES record for William Warren was last updated on June 24, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.