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GILLIAN M. HEADLEY MD
NPI 1497865687
Pediatrics - Neonatal-Perinatal Medicine in Rockford, IL

Active since August 30, 2006PECOS Enrolled
2400 N ROCKTON AVE, ROCKFORD, IL 61103(815) 971-5000 Get Directions Write a Review

NPPES record last updated: May 25, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Gillian M. Headley Md NPPES

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

GILLIAN M. HEADLEY MD (NPI 1497865687) is an individual neonatal-perinatal medicine provider in Rockford, Illinois, licensed in Illinois (036-103485) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS and maintains a secondary practice location in Oshkosh.

NPPES Registry Identity

NPI1497865687
Entity TypeIndividualFemale
Primary Taxonomy2080N0001X
Provider Legal NameGILLIAN M. HEADLEYCredential: MD
Location Address2400 N ROCKTON AVERockford, IL 61103-3655
Mailing Address2400 N Rockton AveRockford, IL 61103-3655 · (815) 971-5000
Phone(815) 971-5000
Sole ProprietorNo
Enumeration DateAugust 30, 2006
Last NPPES UpdateMay 25, 2022
NPPES CertifiedMay 25, 2022
✔ NPI 1497865687 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Neonatal-Perinatal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080N0001X
Licenses✔ Licensed in IL · 036-103485✔ Licensed in WI · 22363
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.
2400 N ROCKTON AVE, Rockford, IL 61103
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Secondary Practice Location 1

Location 1855 N Westhaven DrOshkosh, WI 54904-7668 · Phone (920) 303-8700

Other Identifiers 1

Medicaid036103485IL

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gillian M. Headley 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 Gillian Headley reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Rockford Health Physicians
Same address
Anesthesiology
2400 N ROCKTON AVE
Rockford, IL 61103
  • Reassigned Medicare billing, Illinois enrollment
  • 1,375 clinicians in this Medicare group
NPI 1023275278 (815) 971-5000

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.

KIMBERLY REMEDIOS-SMITH M.D.
Pediatrics (Neonatal-Perinatal Medicine)
2400 N ROCKTON AVE
ROCKFORD, IL 61103
Winnebago County (815) 971-5000
SHETAL PATEL MD
Hospitalist
2400 N ROCKTON AVE
ROCKFORD, IL 61103
Winnebago County (815) 971-5000
DR. LESTER C JURGENS M.D.
Obstetrics & Gynecology
2400 N ROCKTON AVE
ROCKFORD, IL 61103
Winnebago County (815) 971-5000
ROCKFORD HEALTH PHYSICIANS
Anesthesiology
2400 N ROCKTON AVE
ROCKFORD, IL 61103
Winnebago County (815) 971-5000
ALAN G MOWBRAY MD
Anesthesiology
2400 N ROCKTON AVE
ROCKFORD, IL 61103
Winnebago County (815) 971-4000
TODD H. CHAFFIN MD
Emergency Medicine
2400 N ROCKTON AVE
ROCKFORD, IL 61103
Winnebago County (815) 971-2000
TINA LONGPHEE APN
Nurse Practitioner (Family)
2400 N ROCKTON AVE
ROCKFORD, IL 61103
Winnebago County (815) 971-6431
MS. JEAN FRANCES PETERSON MS, CDS
Developmental Therapist
2400 N ROCKTON AVE
ROCKFORD, IL 61103
Winnebago County (815) 971-5184

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 Gillian Headley's NPI number?

The NPI number for Gillian Headley is 1497865687. It was assigned to this individual provider in the NPPES registry on August 30, 2006.

Where is Gillian Headley located?

Gillian Headley practices at 2400 N Rockton Ave, Rockford, IL 61103. The listed phone number is (815) 971-5000.

What is Gillian Headley's specialty?

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

Is Gillian Headley enrolled in Medicare?

Yes. Gillian Headley is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Gillian Headley's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gillian Headley reassigns Medicare benefits to Rockford Health Physicians (Rockford, 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 Gillian Headley'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 Gillian Headley was last updated on May 25, 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.