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KELSEY MERCER CPNP-PC
NPI 1154788370
Nurse Practitioner - Pediatrics in Saint Louis, MO

Active since January 19, 2016PECOS Enrolled
1 CHILDRENS PL, SAINT LOUIS, MO 63110(314) 454-6000 Get Directions Write a Review

NPPES record last updated: November 4, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Nov 4, 2021, Jan 19, 2016 (2 updates tracked since 2016).

About Kelsey Mercer Cpnp-pc NPPES

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

KELSEY MERCER CPNP-PC (NPI 1154788370) is an individual pediatrics provider in Saint Louis, Missouri, licensed in Missouri (2015007606) and active in the NPI registry since January 2016. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1154788370
Entity TypeIndividualFemale
Primary Taxonomy363LP0200X
Provider Legal NameKELSEY MERCERCredential: CPNP-PC
Location Address1 CHILDRENS PLSaint Louis, MO 63110-1002
Mailing Address1 Childrens PlSaint Louis, MO 63110-1002
Phone(314) 454-6000
Sole ProprietorNo
Enumeration DateJanuary 19, 2016
Last NPPES UpdateNovember 4, 20212 updates tracked since enumeration
NPPES CertifiedNovember 4, 2021
✔ NPI 1154788370 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 · 2015007606
1 CHILDRENS PL, Saint Louis, MO 63110
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Other Names 1

Former Name (1)Kelsey M Wassmer

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Kelsey Mercer Cpnp-pc 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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.

ARIE BAKER MSW, LCSW
Social Worker (Clinical)
1 CHILDRENS PL, CAMPUS BOX 8116
SAINT LOUIS, MO 63110
St. Louis City (314) 747-6169
HANNAH EDELMAN MD, PHD
Psychiatry & Neurology (Neurology)
1 CHILDRENS PL
SAINT LOUIS, MO 63110
St. Louis City (314) 454-6120
SUSAN CHEUNG WALSH AUD
Audiologist-Hearing Aid Fitter
1 CHILDRENS PL
SAINT LOUIS, MO 63110
St. Louis City (314) 454-4649
MS. JENNIFER MARIE JACOBI PNP
Nurse Practitioner (Pediatrics)
1 CHILDRENS PL, DEPT NEUROLOGICAL SURGERY, STE 4E
SAINT LOUIS, MO 63110
St. Louis City (314) 362-3577
MS. EMILY LINCOLN RN, NNP-BC
Nurse Practitioner (Neonatal, Critical Care)
1 CHILDRENS PL
SAINT LOUIS, MO 63110
St. Louis City (314) 454-6000
MS. MARISSA ROSE PEREZ-MAGNELLI PNP
Nurse Practitioner (Pediatrics)
1 CHILDRENS PL, DEPT NEUROLOGY, STE 2130
SAINT LOUIS, MO 63110
St. Louis City (314) 454-6120
DR. WILLIAM L RIVES MD
Hospitalist
1 CHILDRENS PL, DIV PED HOSPITALIST MED
SAINT LOUIS, MO 63110
St. Louis City (314) 454-2076
DR. PETER M KILBRIDGE MD
Pediatrics
1 CHILDRENS PL, SUITE C
SAINT LOUIS, MO 63110
St. Louis City (314) 454-2479

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 Kelsey Mercer's NPI number?

The NPI number for Kelsey Mercer is 1154788370. It was assigned to this individual provider in the NPPES registry on January 19, 2016. The provider is also known as Kelsey M Wassmer.

Where is Kelsey Mercer located?

Kelsey Mercer practices at 1 Childrens Pl, Saint Louis, MO 63110. The listed phone number is (314) 454-6000.

What is Kelsey Mercer's specialty?

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

Is Kelsey Mercer enrolled in Medicare?

Yes. Kelsey Mercer is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Kelsey Mercer was last updated on November 4, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.