Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

STILLWATER BEHAVIORAL HEALTH LLC
NPI 1285542878
Clinic/Center - Adult Mental Health in Costa Mesa, CA

Q: What is Stillwater Behavioral Health LLC's NPI number?

The NPI number for Stillwater Behavioral Health LLC is 1285542878. It was assigned to this organization in the NPPES registry on September 1, 2026.

Q: What is Stillwater Behavioral Health LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Adult Mental Health, with taxonomy code 261QM0850X.

Active since September 01, 2026

657 W 19TH ST, COSTA MESA, CA 92627(949) 233-3983 Get Directions Write a Review

NPPES record added: September 1, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

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About Stillwater Behavioral Health Llc NPPES

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

STILLWATER BEHAVIORAL HEALTH LLC (NPI 1285542878) is a healthcare organization registered as an adult mental health in Costa Mesa, California and active in the NPI registry since September 2026. The organization lists John Bennett, Coo, as its authorized official.

NPPES Registry Identity

NPI1285542878

Entity TypeOrganization

Primary Taxonomy261QM0850X

Legal Business NameSTILLWATER BEHAVIORAL HEALTH LLC

Location Address657 W 19TH STCosta Mesa, CA 92627-8600

Mailing Address1901 Newport Blvd Ste 271Costa Mesa, CA 92627-2286 · (949) 233-3983

Phone(949) 233-3983

Organization SubpartNo

Authorized OfficialJohn BennettCoo · (949) 233-3983

Enumeration DateSeptember 1, 2026

NPPES CertifiedSeptember 1, 2026

✔ NPI 1285542878 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Adult Mental HealthAmbulatory Health Care Facilities

Taxonomy Code261QM0850X

Definition

An entity, facility, or distinct part of a facility providing diagnostic, treatment, and prescriptive services related to mental and behavioral disorders in adults.

657 W 19TH ST, Costa Mesa, CA 92627

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Other Providers at the Same Location NPPES 2

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

BRIGHTER DAYS MHC LLC

Clinic/Center (Adult Mental Health)

657 W 19TH ST
COSTA MESA, CA 92627

Orange County (657) 651-9359

XIAOYAN LU

Psychologist

657 W 19TH ST
COSTA MESA, CA 92627

Orange County (949) 415-6067

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 Stillwater Behavioral Health LLC's NPI number?

The NPI number for Stillwater Behavioral Health LLC is 1285542878. It was assigned to this organization in the NPPES registry on September 1, 2026.

Where is Stillwater Behavioral Health LLC located?

Stillwater Behavioral Health LLC is located at 657 W 19th St, Costa Mesa, CA 92627. The listed phone number is (949) 233-3983.

What is Stillwater Behavioral Health LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Adult Mental Health, with taxonomy code 261QM0850X.

When was this NPI record last updated?

The NPPES record for Stillwater Behavioral Health LLC was last updated on September 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.