Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Kirwood Medication Assisted Treatments

Substance Use Disorder Rehabilitation Clinic/Center in Kirkwood, MO · enumerated 2019 · authorized official Gary Hammen, Member.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1053953422

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Registry record

Entity type Organization (Type 2)

Legal business name Kirwood Medication Assisted Treatments

Parent organization Dr Gary Hammen MD Phd LLC

Practice address 111 Prospect Ave Ste 201, Kirkwood, MO, 63122

Phone (314) 644-8310

Fax (314) 293-6749

Enumeration date Oct 17, 2019

Last updated in NPPES May 25, 2020

Taxonomy & classification

261QM0801X Mental Health Clinic/Center (Including Community Mental Health Center) Ambulatory Health Care Facilities Secondary

261QR0405X Substance Use Disorder Rehabilitation Clinic/Center Ambulatory Health Care Facilities Primary

Authorized official

Name Gary Hammen

Title Member

Phone (314) 644-8310

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Where is Kirwood Medication Assisted Treatments located?

The practice location on file with NPPES is in Kirkwood, MO.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-05-25. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-05-25.