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KATIE KESSLER LCSW
NPI 1508306622
Social Worker - Clinical in O Fallon, MO

Active since March 08, 2017PECOS EnrolledAccepts Medicare Assignment
105 CHURCH ST, O FALLON, MO 63366(636) 294-5787 Get Directions Write a Review

NPPES record last updated: March 12, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 12, 2026, May 27, 2020, May 14, 2020 (3 updates tracked since 2020).

About Katie Kessler Lcsw NPPES

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

KATIE KESSLER LCSW (NPI 1508306622) is an individual clinical provider in O Fallon, Missouri, licensed in Missouri (2019000911) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS and is a graduate of Other (2013).

NPPES Registry Identity

NPI1508306622
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameKATIE KESSLERCredential: LCSW
Location Address105 CHURCH STO Fallon, MO 63366-2894
Mailing Address105 Church StO Fallon, MO 63366-2894 · (636) 294-5787
Phone(636) 294-5787
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateMarch 8, 2017
Last NPPES UpdateMarch 12, 20263 updates tracked since enumeration
NPPES CertifiedMarch 12, 2026
✔ NPI 1508306622 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in MO · 2019000911
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
105 CHURCH ST, O Fallon, MO 63366
Open in Google Maps ↗

Other Names 1

Former Name (1)Katie Nelson Msw

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 and accepts Medicare assignment

Katie Kessler Lcsw is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID244567683
PECOS Enrollment IDI20190808001752
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 Katie Kessler reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Side By Side Wellness LLC
Same address
Clinical
105 CHURCH ST
O Fallon, MO 63366
  • Reassigned Medicare billing, Missouri enrollment
  • 4 clinicians in this Medicare group
NPI 1386112035 (636) 294-5787

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 63366 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
$0.00 typical visit price
range $55.65 – $169.38
Typical copayment $0.00 (range $13.91 – $42.34)
Most-billed visit code NA
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
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 7

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

CLARE BISHOP LCSW
Social Worker (Clinical)
105 CHURCH ST
O FALLON, MO 63366
St. Charles County (636) 294-5787
HANNA MOELLENHOFF LCSW
Social Worker (Clinical)
105 CHURCH ST
O FALLON, MO 63366
St. Charles County (636) 294-5787
HEATHER ST. PETER LCSW
Social Worker (Clinical)
105 CHURCH ST
O FALLON, MO 63366
St. Charles County (636) 294-5787
SIDE BY SIDE WELLNESS LLC
Social Worker (Clinical)
105 CHURCH ST
O FALLON, MO 63366
St. Charles County (636) 294-5787
ALYSON MILLER LCSW
Social Worker (Clinical)
105 CHURCH ST
O FALLON, MO 63366
St. Charles County (636) 294-5787
NICOLE PONDROM LMSW
Social Worker
105 CHURCH ST
O FALLON, MO 63366
St. Charles County (636) 294-5787
DREW ELIZABETH ADAMS PLPC
Counselor (Professional)
105 CHURCH ST
O FALLON, MO 63366
St. Charles County (636) 294-5787

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 Katie Kessler's NPI number?

The NPI number for Katie Kessler is 1508306622. It was assigned to this individual provider in the NPPES registry on March 8, 2017. The provider is also known as Katie Nelson Msw.

Where is Katie Kessler located?

Katie Kessler practices at 105 Church St, O Fallon, MO 63366. The listed phone number is (636) 294-5787.

What is Katie Kessler's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Katie Kessler enrolled in Medicare?

Yes. Katie Kessler is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Katie Kessler's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katie Kessler reassigns Medicare benefits to Side By Side Wellness LLC (O Fallon, 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 Katie Kessler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Katie Kessler 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 4 other insurers list Katie Kessler 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 Katie Kessler was last updated on March 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.