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JOHN STACK
NPI 1922461565
Pediatrics - Neonatal-Perinatal Medicine in Little Rock, AR

Active since March 31, 2016PECOS Enrolled
1 CHILDRENS WAY # 653, LITTLE ROCK, AR 72202(501) 364-1100 Get Directions Write a Review

NPPES record last updated: July 18, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 18, 2022, Jul 15, 2022, Mar 31, 2016 (3 updates tracked since 2016).

About John Stack NPPES

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

JOHN STACK (NPI 1922461565) is an individual neonatal-perinatal medicine provider in Little Rock, Arkansas, licensed in Arkansas (E-15426) and active in the NPI registry since March 2016. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1922461565
Entity TypeIndividualMale
Primary Taxonomy2080N0001X
Provider Legal NameJOHN STACK
Location Address1 CHILDRENS WAY # 653Little Rock, AR 72202-3500
Mailing AddressPo Box 251418Little Rock, AR 72225-1418 · (501) 364-1100
Phone(501) 364-1100
Sole ProprietorNo
Enumeration DateMarch 31, 2016
Last NPPES UpdateJuly 18, 20223 updates tracked since enumeration
NPPES CertifiedJuly 18, 2022
✔ NPI 1922461565 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
License✔ Licensed in AR · E-15426
Definition
A pediatrician who is the principal care provider for sick newborn infants. Clinical expertise is used for direct patient care and for consulting with obstetrical colleagues to plan for the care of mothers who have high-risk pregnancies.
Also ListedPediatricsTaxonomy 208000000X · License E-15426 (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 Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John Stack 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 John Stack reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Arkansas Childrens Hospital
Same address
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
University Of Arkansas For Medical Sciences
3.2 mi
Family Medicine
1401 W CAPITOL AVE
Little Rock, AR 72201
  • Reassigned Medicare billing, Arkansas enrollment
  • Also billed through NPI 1114255353 (Arkansas)
  • 2,038 clinicians in this Medicare group
NPI 1932872975 (501) 686-8000
Arkansas Childrens Professional Services Organization LLC
3.4 mi
Pediatrics
1 CHILDRENS WAY
Little Rock, AR 72202
  • Reassigned Medicare billing, Arkansas enrollment
  • 653 clinicians in this Medicare group
NPI 1629889464 (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
MRS. JOY ANGELA CHILDRESS APN
Nurse Practitioner (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 John Stack's NPI number?

The NPI number for John Stack is 1922461565. It was assigned to this individual provider in the NPPES registry on March 31, 2016.

Where is John Stack located?

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

What is John Stack's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Neonatal-Perinatal Medicine, with taxonomy code 2080N0001X.

Is John Stack enrolled in Medicare?

Yes. John Stack is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for John Stack's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Stack reassigns Medicare benefits to 3 organizations: Arkansas Childrens Hospital (Little Rock, AR), University Of Arkansas For Medical Sciences (Little Rock, AR) and Arkansas Childrens Professional Services Organization LLC (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 John Stack's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Stack accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list John Stack 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 John Stack was last updated on July 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.