MENTAL HEALTH SYSTEMS, INC.
NPI 1841813938
Community/Behavioral Health in Fresno, CA
About Mental Health Systems, Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MENTAL HEALTH SYSTEMS, INC. (NPI 1841813938), doing business as D.a.r.t. West, is a healthcare organization registered as a community/behavioral health in Fresno, California and active in the NPI registry since May 2020. The organization lists James C Callaghan, President/ceo, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mental Health Systems, Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
72Medicare enrollment records show 72 clinicians reassign Medicare billing to Mental Health Systems, Inc., which bills Medicare for the services they deliver. Of these, 1 practice at this address and 7 within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 5
Nearest to this location (20)
See all 72Fresno, CA 93705
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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Review by Shannon ***** March 12, 2025
5/5Frequently 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 Mental Health Systems, Inc.'s NPI number?
The NPI number for Mental Health Systems, Inc. is 1841813938. It was assigned to this organization in the NPPES registry on May 22, 2020. The provider is doing business as D.A.R.T. West.
Where is Mental Health Systems, Inc. located?
Mental Health Systems, Inc. is located at 2549 W Shaw Ave, Fresno, CA 93711. The listed phone number is (559) 264-7521.
What is Mental Health Systems, Inc.'s specialty?
The primary specialty registered for this NPI is Community/Behavioral Health with taxonomy code 251S00000X.
Is Mental Health Systems, Inc. enrolled in Medicare?
Yes. Mental Health Systems, Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Mental Health Systems, Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 72 clinicians in 5 Medicare specialties reassign their Medicare billing to Mental Health Systems, Inc.. A 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 the clinician's services. The largest specialties are Nurse Practitioner (27), Psychiatry (26) and Clinical Social Worker (10). Of these, 1 practice at this address and 7 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Mental Health Systems, Inc. was last updated on July 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Mental Health Systems, Inc. · NPI 1841813938
Community/Behavioral Health organization in Fresno, California. Organization record, active in the CMS NPPES registry since May 22, 2020.
## Identity
- **NPI:** 1841813938 (Entity type: Organization)
- **Enumerated:** May 22, 2020
- **Primary specialty:** Community/Behavioral Health · taxonomy 251S00000X
- **Also known as:** D.A.R.T. West (Doing Business As)
- **Organization subpart:** No
- **Authorized official:** James Callaghan, PRESIDENT/CEO
## Practice location
- **Address:** 2549 W SHAW AVE, Fresno, CA 93711-3308
- **Phone:** (559) 264-7521
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 72 clinicians in 5 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Nurse Practitioner (27), Psychiatry (26), Clinical Social Worker (10); 1 practice at this address and 7 within 10 miles; [full list](https://npiprofile.com/npi/1841813938/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 24, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1841813938) · Data from the CMS NPPES public registry.