1. Home
  2. Directory
  3. Missouri
  4. Arnold
  5. Nurse Practitioner
  6. NPI Profile

GAYLE OSTERMILLER FNP-BC
NPI 1023542602
Nurse Practitioner - Family in Arnold, MO

Active since April 20, 2017PECOS Enrolled
1296 JEFFCO BLVD, ARNOLD, MO 63010(636) 321-8610 Get Directions Write a Review

NPPES record last updated: November 9, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 9, 2020, Apr 20, 2017 (2 updates tracked since 2017).

About Gayle Ostermiller Fnp-bc NPPES

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

GAYLE OSTERMILLER FNP-BC (NPI 1023542602) is an individual family provider in Arnold, Missouri, licensed in Missouri (2017006438) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1023542602
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameGAYLE OSTERMILLERCredential: FNP-BC
Location Address1296 JEFFCO BLVDArnold, MO 63010-2138
Mailing Address1296 Jeffco BlvdArnold, MO 63010-2138 · (636) 321-8610
Phone(636) 321-8610
Sole ProprietorNo
Enumeration DateApril 20, 2017
Last NPPES UpdateNovember 9, 20202 updates tracked since enumeration
NPPES CertifiedNovember 9, 2020
✔ NPI 1023542602 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in MO · 2017006438
1296 JEFFCO BLVD, Arnold, MO 63010
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health 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)

Gayle Ostermiller Fnp-bc 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

2

Medicare enrollment records show Gayle Ostermiller reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ssm Health Care St Louis
8.4 mi
Emergency Medicine
1015 BOWLES AVENUE
Fenton, MO 63026
  • Reassigned Medicare billing, Missouri enrollment
  • 741 clinicians in this Medicare group
NPI 1275586174 (636) 496-2502
Board Of Trustees Of Southern Illinois University
14 mi
Nurse Practitioner
601 JAMES R THOMPSON BLVD, BUILDING D, SUITE 2015
East Saint Louis, IL 62201
  • Reassigned Medicare billing, Illinois enrollment
  • 3 clinicians in this Medicare group
NPI 1104230168 (618) 482-6959

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 63010 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
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
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.

Other Providers at the Same Location NPPES 15

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MOLLY MEGHANN HENSON M.D.
Family Medicine
1296 JEFFCO BLVD
ARNOLD, MO 63010
Jefferson County (636) 321-8600
SSM HEALTH
Clinic/Center (Urgent Care)
1296 JEFFCO BLVD
ARNOLD, MO 63010
Jefferson County (636) 321-8610
NAJAT A. AL-SHERRI M.D.
Obstetrics & Gynecology (Obstetrics)
1296 JEFFCO BLVD
ARNOLD, MO 63010
Jefferson County (636) 321-8600
ANGELA LYNN CHANDLER FNP-BC
Nurse Practitioner (Family)
1296 JEFFCO BLVD
ARNOLD, MO 63010
Jefferson County (636) 321-8610
DR. JAYA BARINA MD
Clinic/Center (Primary Care)
1296 JEFFCO BLVD
ARNOLD, MO 63010
Jefferson County (636) 321-8600
ANN REBECCA ABBOTT MARIN DO
Family Medicine
1296 JEFFCO BLVD
ARNOLD, MO 63010
Jefferson County (636) 321-8600
DARCEE BAIR SCHMITT FNP
Nurse Practitioner (Family)
1296 JEFFCO BLVD
ARNOLD, MO 63010
Jefferson County (636) 321-8600
SSM HEALTH
General Acute Care Hospital
1296 JEFFCO BLVD
ARNOLD, MO 63010
Jefferson County (636) 321-8600

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 Gayle Ostermiller's NPI number?

The NPI number for Gayle Ostermiller is 1023542602. It was assigned to this individual provider in the NPPES registry on April 20, 2017.

Where is Gayle Ostermiller located?

Gayle Ostermiller practices at 1296 Jeffco Blvd, Arnold, MO 63010. The listed phone number is (636) 321-8610.

What is Gayle Ostermiller's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Gayle Ostermiller enrolled in Medicare?

Yes. Gayle Ostermiller is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gayle Ostermiller's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gayle Ostermiller reassigns Medicare benefits to 2 organizations: Ssm Health Care St Louis (Fenton, MO) and Board Of Trustees Of Southern Illinois University (East Saint Louis, IL). 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 Gayle Ostermiller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gayle Ostermiller accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 1 other insurer list Gayle Ostermiller 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 Gayle Ostermiller was last updated on November 9, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.