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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

GRANT N UNDERHILL LCSW
NPI 1053982579
Social Worker - Clinical in Saint Louis, MO

Active since July 06, 2021PECOS Enrolled
1001 LYNCH ST, SAINT LOUIS, MO 63118(314) 535-5600 Get Directions Write a Review

NPPES record last updated: July 28, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 28, 2026, Apr 16, 2026, Jul 6, 2021 (3 updates tracked since 2021).

About Grant N Underhill Lcsw NPPES

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

GRANT N UNDERHILL LCSW (NPI 1053982579) is an individual clinical provider in Saint Louis, Missouri, licensed in Missouri (2023041447) and active in the NPI registry since July 2021. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1053982579
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameGRANT N UNDERHILLCredential: LCSW
Location Address1001 LYNCH STSaint Louis, MO 63118-1818
Mailing AddressPo Box 844715Kansas City, MO 64184-4715 · (417) 761-5214 · Fax (417) 761-5065
Phone(314) 535-5600
Sole ProprietorNo
Enumeration DateJuly 6, 2021
Last NPPES UpdateJuly 28, 20263 updates tracked since enumeration
NPPES CertifiedJuly 28, 2026
✔ NPI 1053982579 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 · 2023041447
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.
1001 LYNCH ST, Saint Louis, MO 63118
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 Home State Health, Ambetter from Sunflower Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Grant N Underhill Lcsw 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 63118 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 20

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

FAMILY CARE HEALTH CENTERS
Clinic/Center (Federally Qualified Health Center (FQHC))
1001 LYNCH ST
SAINT LOUIS, MO 63118
St. Louis City (314) 531-5444
ELISHA CHANTILLY LINNEN-GLASS LPC
Counselor (Professional)
1001 LYNCH ST
SAINT LOUIS, MO 63118
St. Louis City (314) 535-5600
SAMANTHA N BIGHAM OT
Occupational Therapist
1001 LYNCH ST
SAINT LOUIS, MO 63118
St. Louis City (314) 535-5600
SHARON K BROWNE FPMHNP
Nurse Practitioner (Psychiatric/Mental Health)
1001 LYNCH ST
SAINT LOUIS, MO 63118
St. Louis City (314) 535-5600
AMY LYNN HENNESSY OT
Occupational Therapist
1001 LYNCH ST
SAINT LOUIS, MO 63118
St. Louis City (314) 535-5600
TIARE SADARANANDA OTR/L
Occupational Therapist
1001 LYNCH ST
SAINT LOUIS, MO 63118
St. Louis City (314) 535-5600
JUSTIN THOMAS UFHEIL LCSW
Social Worker (Clinical)
1001 LYNCH ST
SAINT LOUIS, MO 63118
St. Louis City (315) 535-5600
LAURA CHRISTINE DOWNING LCSW
Social Worker (Clinical)
1001 LYNCH ST
SAINT LOUIS, MO 63118
St. Louis City (314) 535-5600

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 Grant Underhill's NPI number?

The NPI number for Grant Underhill is 1053982579. It was assigned to this individual provider in the NPPES registry on July 6, 2021.

Where is Grant Underhill located?

Grant Underhill practices at 1001 Lynch St, Saint Louis, MO 63118. The listed phone number is (314) 535-5600.

What is Grant Underhill's specialty?

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

Is Grant Underhill enrolled in Medicare?

Yes. Grant Underhill is registered in the Medicare PECOS enrollment system.

What insurance does Grant Underhill accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 3 other insurers list Grant Underhill 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 Grant Underhill was last updated on July 28, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 days 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.