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ASHLEY ONEIL MD
NPI 1639800550
Pediatrics in Springfield, IL

Active since June 21, 2022PECOS Enrolled
400 N 9TH ST 4TH FLOOR 4B, SPRINGFIELD, IL 62702(217) 545-8000(217) 545-2303 Get Directions Write a Review

NPPES record last updated: June 30, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Ashley Oneil Md NPPES

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

ASHLEY ONEIL MD (NPI 1639800550) is an individual pediatrics provider in Springfield, Illinois, licensed in Illinois (036.175720) and active in the NPI registry since June 2022. She is enrolled in Medicare PECOS and maintains a secondary practice location in Springfield.

NPPES Registry Identity

NPI1639800550
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameASHLEY ONEILCredential: MD
Location Address400 N 9TH ST 4TH FLOOR 4BSpringfield, IL 62702-5310
Mailing AddressPo Box 19639Springfield, IL 62794-9639 · (217) 544-8000
Phone(217) 545-8000
Fax(217) 545-2303
Sole ProprietorNo
Enumeration DateJune 21, 2022
Last NPPES UpdateJune 30, 2025
NPPES CertifiedJune 30, 2025
✔ NPI 1639800550 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in IL · 036.175720
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.
400 N 9TH ST 4TH FLOOR 4B, Springfield, IL 62702
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Other Names 1

Former Name (1)Ashley Anderson

Secondary Practice Location 1

Location 1400 N 9th St # 4ASpringfield, IL 62702-5310 · Phone (217) 545-4779

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ashley Oneil 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.

Medicare Billing Reassignment

Medicare enrollment records show Ashley Oneil reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Siu Physicians & Surgeons, Inc
0.5 mi
Endocrinology, Diabetes & Metabolism
201 E MADISON ST STE 328
Springfield, IL 62702
  • Reassigned Medicare billing, Illinois enrollment
  • 645 clinicians in this Medicare group
NPI 1558385989 (217) 545-8000

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62702 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
$85.71 typical visit price
range $54.80 – $168.44
Typical copayment $21.42 (range $13.70 – $42.11)
Most-billed visit code 99203
Established Patient
$97.25 typical visit price
range $17.16 – $136.56
Typical copayment $24.31 (range $4.29 – $34.14)
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 Ashley Oneil's NPI number?

The NPI number for Ashley Oneil is 1639800550. It was assigned to this individual provider in the NPPES registry on June 21, 2022. The provider is also known as Ashley Anderson.

Where is Ashley Oneil located?

Ashley Oneil practices at 400 N 9th St 4th Floor 4B, Springfield, IL 62702. The listed phone number is (217) 545-8000.

What is Ashley Oneil's specialty?

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

Is Ashley Oneil enrolled in Medicare?

Yes. Ashley Oneil is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Ashley Oneil's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ashley Oneil reassigns Medicare benefits to Siu Physicians & Surgeons, Inc (Springfield, IL). The 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 Ashley Oneil's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Ashley Oneil was last updated on June 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 months 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.