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ELIZABETH SUSAN O BRIEN MD
NPI 1831276427
Pediatrics in Chesterfield, MO

Active since November 01, 2006PECOS Enrolled
16216 BAXTER RD, SUITE 299, CHESTERFIELD, MO 63017(636) 530-9999(636) 530-0977 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Elizabeth Susan O Brien Md NPPES

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

ELIZABETH SUSAN O BRIEN MD (NPI 1831276427) is an individual pediatrics provider in Chesterfield, Missouri, licensed in Missouri (R9J85) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1831276427
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameELIZABETH SUSAN O BRIENCredential: MD
Location Address16216 BAXTER RD, SUITE 299Chesterfield, MO 63017
Mailing Address12768 Whispering Hills LaneSt Louis, MO 63146 · (314) 469-4955
Phone(636) 530-9999
Fax(636) 530-0977
Sole ProprietorNo
Enumeration DateNovember 1, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1831276427 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in MO · R9J85
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.
16216 BAXTER RD, Chesterfield, MO 63017
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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 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)

Elizabeth Susan O Brien 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 Elizabeth O Brien reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Ssm Cardinal Glennon Childrens Hospital
5.0 mi
Pediatrics
2927 S . KINGS HIGHWAY BLVD
Saint Louis, MO 63139
  • Reassigned Medicare billing, Missouri enrollment
  • Medicare enrollment name: Ssm Cardinal Glennon Children's Hospital
  • 414 clinicians in this Medicare group
NPI 1073568226 (314) 268-4070

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 63017 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 20

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

DR. LAURA M HUFF PH.D.
Psychologist (Clinical)
16216 BAXTER RD, SUITE 399
CHESTERFIELD, MO 63017
St. Louis County (636) 532-9188
MARSHA WEISEL
Occupational Therapist
16216 BAXTER RD, SUITE 330
CHESTERFIELD, MO 63017
St. Louis County (636) 733-3330
MONICA UTHLAUT LCSW
Social Worker (Clinical)
16216 BAXTER RD, STE. 205
CHESTERFIELD, MO 63017
St. Louis County (636) 532-9188
CAROLYNN F WOLFF DMD PC
Dentist
16216 BAXTER RD, STE 215
CHESTERFIELD, MO 63017
St. Louis County (636) 537-3600
JENNIFER A KAMER LPC
Counselor (Professional)
16216 BAXTER RD, SUITE 399
CHESTERFIELD, MO 63017
St. Louis County (636) 532-9188
CHESTERFIELD SPINE & SPORTS MEDICINE CENTER LLC
Physical Medicine & Rehabilitation
16216 BAXTER RD, SUITE 190
CHESTERFIELD, MO 63017
St. Louis County (270) 252-5840
DR. JOSEPH L. HOLLINGSWORTH D.C.
Chiropractor
16216 BAXTER RD, STE 190
CHESTERFIELD, MO 63017
St. Louis County (636) 778-1515
ANNA MANDA
Speech-Language Pathologist
16216 BAXTER RD, SUITE 330
CHESTERFIELD, MO 63017
St. Louis County (636) 733-3330

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 Elizabeth O Brien's NPI number?

The NPI number for Elizabeth O Brien is 1831276427. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Elizabeth O Brien located?

Elizabeth O Brien practices at 16216 Baxter Rd Suite 299, Chesterfield, MO 63017. The listed phone number is (636) 530-9999.

What is Elizabeth O Brien's specialty?

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

Is Elizabeth O Brien enrolled in Medicare?

Yes. Elizabeth O Brien is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Elizabeth O Brien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth O Brien reassigns Medicare benefits to Ssm Cardinal Glennon Childrens Hospital (Saint Louis, MO). 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 Elizabeth O Brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Elizabeth O Brien 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 3 other insurers list Elizabeth O Brien 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 Elizabeth O Brien was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.