Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. WILLIAM C WARREN IV MD
NPI 1851345904
Pediatrics in Atlanta, GA

Q: What is William Warren's NPI number?

The NPI number for William Warren is 1851345904. It was assigned to this individual provider in the NPPES registry on May 22, 2006. The provider is also known as Dr. William Chester Warren MD.

Q: What is William Warren's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Q: When was this NPI record last updated?

The NPPES record for William Warren was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 days 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 May 22, 2006PECOS Enrolled

239 IVAN ALLEN JR BLVD, ATLANTA, GA 30313(404) 523-6571(404) 523-6574 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 23, 2026.

On this page

About Dr. William C Warren Iv Md NPPES

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

DR. WILLIAM C WARREN IV MD (NPI 1851345904) is an individual pediatrics provider in Atlanta, Georgia, licensed in Georgia (023126) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1851345904

Entity TypeIndividualMale

Primary Taxonomy208000000X

Provider Legal NameDR. WILLIAM C WARREN IVCredential: MD

Location Address239 IVAN ALLEN JR BLVDAtlanta, GA 30313

Mailing Address239 Ivan Allen Jr BlvdAtlanta, GA 30313 · (404) 523-6571 · Fax (404) 523-6574

Phone(404) 523-6571

Fax(404) 523-6574

Sole ProprietorNo

Enumeration DateMay 22, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1851345904 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians

Taxonomy Code208000000X

License✔ Licensed in GA · 023126

Definition

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

239 IVAN ALLEN JR BLVD, Atlanta, GA 30313

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Other Names 1

Other Name (5)Dr. William Chester Warren Md

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Ambetter from Absolute Total Care, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William C Warren Iv Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 30313 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$88.06 typical visit price

range $56.84 – $172.43

Typical copayment $22.01 (range $14.21 – $43.10)

Most-billed visit code 99203

Established Patient

$100.20 typical visit price

range $18.22 – $140.40

Typical copayment $25.05 (range $4.55 – $35.10)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 1851345904. It was assigned to this individual provider in the NPPES registry on May 22, 2006. The provider is also known as Dr. William Chester Warren MD.

Where is William Warren located?

William Warren practices at 239 Ivan Allen Jr Blvd, Atlanta, GA 30313. The listed phone number is (404) 523-6571.

What is William Warren's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is William Warren enrolled in Medicare?

Yes. William Warren is registered in the Medicare PECOS enrollment system.

What insurance does William Warren accept?

Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter from Absolute Total Care, Ambetter of Alabama and Ambetter of North Carolina and 1 other insurer list William Warren as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for William Warren was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 days 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.