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MS. MELISSA MARIE OEXEMAN PNP
NPI 1275283988
Nurse Practitioner - Pediatrics in Saint Louis, MO

Active since March 25, 2022PECOS Enrolled
8888 LADUE RD, STE 100, SAINT LOUIS, MO 63124(314) 862-4050(314) 862-1141 Get Directions Write a Review

NPPES record last updated: April 17, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 25, 2024, Apr 10, 2024, Jul 12, 2022 (3 updates tracked since 2022).

About Ms. Melissa Marie Oexeman Pnp NPPES

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

MS. MELISSA MARIE OEXEMAN PNP (NPI 1275283988) is an individual pediatrics provider in Saint Louis, Missouri, licensed in Missouri (2020038571) and active in the NPI registry since March 2022. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1275283988
Entity TypeIndividualFemale
Primary Taxonomy363LP0200X
Provider Legal NameMS. MELISSA MARIE OEXEMANCredential: PNP
Location Address8888 LADUE RD, STE 100Saint Louis, MO 63124-2326
Mailing AddressPo Box 7412125Chicago, IL 60674-2125 · (314) 862-4050 · Fax (314) 862-1141
Phone(314) 862-4050
Fax(314) 862-1141
Sole ProprietorNo
Enumeration DateMarch 25, 2022
Last NPPES UpdateApril 17, 20253 updates tracked since enumeration
NPPES CertifiedMarch 25, 2022
✔ NPI 1275283988 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · PediatricsPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0200X
License✔ Licensed in MO · 2020038571
8888 LADUE RD, Saint Louis, MO 63124
Open in Google Maps ↗

Other Identifiers 1

Medicaid420108549MO

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Melissa Marie Oexeman Pnp 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 Melissa Oexeman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Washington University
Same address
Multi-Specialty
8888 LADUE RD STE 100
Saint Louis, MO 63124
  • Reassigned Medicare billing, Missouri enrollment
  • 12 clinicians in this Medicare group
NPI 1346847233 (314) 862-4050

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 63124 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. KIMBERLY S SIRL PH.D.
Psychologist (Clinical)
8888 LADUE RD, #120
SAINT LOUIS, MO 63124
St. Louis County (314) 454-6069
WOLKEN DENTAL D D S P C
Durable Medical Equipment & Medical Supplies (Customized Equipment)
8888 LADUE RD
SAINT LOUIS, MO 63124
St. Louis County (314) 727-6676
WOLKEN DENTAL
Dentist (General Practice)
8888 LADUE RD, STE 200
ST. LOUIS, MO 63124
St. Louis County (314) 727-6676
DR. ELIZABETH L ATKINSON MD
Pediatrics
8888 LADUE RD, STE 100
SAINT LOUIS, MO 63124
St. Louis County (314) 862-4050
DR. CHRISTOPHER M WOLKEN DDS
Dentist
8888 LADUE RD, STE 200
SAINT LOUIS, MO 63124
St. Louis County (314) 727-6676
DR. ARCHNA GOEL CALFEE MD
Pediatrics
8888 LADUE RD, STE 100
SAINT LOUIS, MO 63124
St. Louis County (314) 862-4050
DR. JENNIFER ANNE HORST MD
Pediatrics
8888 LADUE RD, STE 100
SAINT LOUIS, MO 63124
St. Louis County (314) 862-4050
DR. SUSAN C SYLVIA PH.D.
Psychologist (Clinical)
8888 LADUE RD, #120
SAINT LOUIS, MO 63124
St. Louis County (314) 454-6069

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 Melissa Oexeman's NPI number?

The NPI number for Melissa Oexeman is 1275283988. It was assigned to this individual provider in the NPPES registry on March 25, 2022.

Where is Melissa Oexeman located?

Melissa Oexeman practices at 8888 Ladue Rd Ste 100, Saint Louis, MO 63124. The listed phone number is (314) 862-4050.

What is Melissa Oexeman's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Pediatrics, with taxonomy code 363LP0200X.

Is Melissa Oexeman enrolled in Medicare?

Yes. Melissa Oexeman is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Melissa Oexeman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Oexeman reassigns Medicare benefits to Washington University (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 Melissa Oexeman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Melissa Oexeman accept?

Health plans from UnitedHealthcare list Melissa Oexeman 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 Melissa Oexeman was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.