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DR. OLIVIA KATHERINE IRBY M.D.
NPI 1538393103
Pediatrics - Pediatric Critical Care Medicine in Little Rock, AR

Active since May 11, 2009PECOS Enrolled
1 CHILDRENS WAY # 653, LITTLE ROCK, AR 72202(501) 364-1100(501) 364-4082 Get Directions Write a Review

NPPES record last updated: March 13, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Olivia Katherine Irby M.d. NPPES

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

DR. OLIVIA KATHERINE IRBY M.D. (NPI 1538393103) is an individual pediatric critical care medicine provider in Little Rock, Arkansas, licensed in Arkansas (E-7506) and active in the NPI registry since May 2009. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1538393103
Entity TypeIndividualFemale
Primary Taxonomy2080P0203X
Provider Legal NameDR. OLIVIA KATHERINE IRBYCredential: M.D.
Location Address1 CHILDRENS WAY # 653Little Rock, AR 72202-3500
Mailing Address1 Childrens Way # 653Little Rock, AR 72202-3500 · (501) 364-1100 · Fax (501) 364-4082
Phone(501) 364-1100
Fax(501) 364-4082
Sole ProprietorNo
Enumeration DateMay 11, 2009
Last NPPES UpdateMarch 13, 2020
NPPES CertifiedMarch 13, 2020
✔ NPI 1538393103 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Critical Care MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080P0203X
License✔ Licensed in AR · E-7506
Definition
A pediatrician expert in advanced life support for children from the term or near-term neonate to the adolescent. This competence extends to the critical care management of life-threatening organ system failure from any cause in both medical and surgical patients and to the support of vital physiological functions. This specialist may have administrative responsibilities for intensive care units and also facilitates patient care among other specialists.
Also ListedPediatricsTaxonomy 208000000X · License E-7506 (AR)
1 CHILDRENS WAY # 653, Little Rock, AR 72202
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Health Advantage, Octave.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Olivia Katherine Irby M.d. 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.

Medicare Billing Reassignments

3

Medicare enrollment records show Olivia Irby reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Arkansas Childrens Professional Services Organization LLC
Same address
Pediatrics
1 CHILDRENS WAY
Little Rock, AR 72202
  • Reassigned Medicare billing, Arkansas enrollment
  • 653 clinicians in this Medicare group
NPI 1629889464 (501) 364-2526
University Of Arkansas For Medical Sciences
0.1 mi
Psychologist
1 CHILDRENS WAY # 653
Little Rock, AR 72202
  • Reassigned Medicare billing, Arkansas enrollment
  • 1,246 clinicians in this Medicare group
NPI 1114255353 (501) 364-1100
Arkansas Childrens Hospital
3.4 mi
Pediatrics
1 CHILDRENS WAY # 664
Little Rock, AR 72202
  • Reassigned Medicare billing, Arkansas enrollment
  • 944 clinicians in this Medicare group
NPI 1598773079 (501) 364-2526

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

ADRIENNE MARIE KODER
Orthopaedic Surgery
1 CHILDRENS WAY # 653
LITTLE ROCK, AR 72202
Pulaski County (501) 364-1100
STEPHEN JAMES CANON M.D.
Urology (Pediatric Urology)
1 CHILDRENS WAY # 653
LITTLE ROCK, AR 72202
Pulaski County (501) 364-1100
HEATHER LYNN YOUNG MD
Pediatrics (Pediatric Infectious Diseases)
1 CHILDRENS WAY # 653
LITTLE ROCK, AR 72202
Pulaski County (501) 364-1100
MRS. GLENDA MARIE ECKERT APN
Nurse Practitioner (Pediatrics)
1 CHILDRENS WAY # 653
LITTLE ROCK, AR 72202
Pulaski County (501) 364-1100
AMBRE' LACHELLE POWNALL APN, PNP-BC
Nurse Practitioner (Pediatrics)
1 CHILDRENS WAY # 653
LITTLE ROCK, AR 72202
Pulaski County (501) 364-1100
ANITA JEAN BUELL-SANDERS
Nurse Practitioner (Acute Care)
1 CHILDRENS WAY # 653
LITTLE ROCK, AR 72202
Pulaski County (501) 364-3620
VIKAS CHOWDHARY M.D.
Pediatrics
1 CHILDRENS WAY # 653
LITTLE ROCK, AR 72202
Pulaski County (501) 364-1100
BRITTNEY HARRIS
Pediatrics
1 CHILDRENS WAY # 653
LITTLE ROCK, AR 72202
Pulaski County (501) 364-1100

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 Olivia Irby's NPI number?

The NPI number for Olivia Irby is 1538393103. It was assigned to this individual provider in the NPPES registry on May 11, 2009.

Where is Olivia Irby located?

Olivia Irby practices at 1 Childrens Way # 653, Little Rock, AR 72202. The listed phone number is (501) 364-1100.

What is Olivia Irby's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Critical Care Medicine, with taxonomy code 2080P0203X.

Is Olivia Irby enrolled in Medicare?

Yes. Olivia Irby is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Olivia Irby's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Olivia Irby reassigns Medicare benefits to 3 organizations: Arkansas Childrens Professional Services Organization LLC (Little Rock, AR), University Of Arkansas For Medical Sciences (Little Rock, AR) and Arkansas Childrens Hospital (Little Rock, AR). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Olivia Irby's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Olivia Irby accept?

Health plans from Health Advantage and Octave list Olivia Irby 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 Olivia Irby was last updated on March 13, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.