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MENTAL HEALTH SYSTEMS, INC.
NPI 1043732944
Community/Behavioral Health in San Diego, CA

Active since July 12, 2017
8775 AERO DR STE 132, SAN DIEGO, CA 92123(858) 573-2600 Get Directions Write a Review

NPPES record last updated: July 24, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 24, 2026, Aug 26, 2020, Aug 14, 2017 and 1 more (4 updates tracked since 2017).

About Mental Health Systems, Inc. NPPES

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

MENTAL HEALTH SYSTEMS, INC. (NPI 1043732944), doing business as City Star Act, is a healthcare organization registered as a community/behavioral health in San Diego, California and active in the NPI registry since July 2017. The organization lists James C. Callaghan, President/ceo, as its authorized official.

NPPES Registry Identity

NPI1043732944
Entity TypeOrganization
Primary Taxonomy251S00000X
Legal Business NameMENTAL HEALTH SYSTEMS, INC.
Location Address8775 AERO DR STE 132San Diego, CA 92123-1779
Mailing Address9465 Farnham StSan Diego, CA 92123-1308
Phone(858) 573-2600
Organization SubpartNo
Authorized OfficialJames C. CallaghanPresident/ceo · (858) 573-2600
Enumeration DateJuly 12, 2017
Last NPPES UpdateJuly 24, 20264 updates tracked since enumeration
NPPES CertifiedJuly 24, 2026
✔ NPI 1043732944 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCommunity/Behavioral HealthAgencies
Taxonomy Code251S00000X
Definition
A private or public agency usually under local government jurisdiction, responsible for assuring the delivery of community based mental health, intellectual disabilities, substance abuse and/or behavioral health services to individuals with those disabilities. Services may range from companion care, respite, transportation, community integration, crisis intervention and stabilization, supported employment, day support, prevocational services, residential support, therapeutic and supportive consultation, environmental modifications, intensive in-home therapy and day treatment, in addition to traditional mental health and behavioral treatment.
8775 AERO DR STE 132, San Diego, CA 92123
Open in Google Maps ↗

Other Names 1

Doing Business AsCity Star Act

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

72

Medicare enrollment records show 72 clinicians reassign Medicare billing to Mental Health Systems, Inc., which bills Medicare for the services they deliver. Of these, 24 practice within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 5

Nurse Practitioner27
Psychiatry26
Clinical Social Worker10
Marriage and Family Therapist6
Mental Health Counselor3

Nearest to this location (20)

See all 72
Sree Reddy
Psychiatry
NPI 1346700101
3020 CHILDRENS WAY # MC5018
San Diego, CA 92123
(858) 576-1700
✔ PECOS✔ Accepts Medicare1.1 mi
Jason Keri, MD
Psychiatry
NPI 1811915812
2810 CAMINO DEL RIO S STE 102
San Diego, CA 92108
(619) 299-4374
✔ PECOS✔ Accepts Medicare2.7 mi
Johanna Bermudez Vera
Nurse Practitioner
NPI 1639647647
2810 CAMINO DEL RIO S STE 102
San Diego, CA 92108
(619) 299-1419
✔ PECOS2.7 mi
Lea Sherman, PMHNP-BC
Nurse Practitioner
NPI 1235771932
2810 CAMINO DEL RIO S STE 102
San Diego, CA 92108
(619) 299-1419
✔ PECOS✔ Accepts Medicare2.7 mi
David Lindley, RN
Nurse Practitioner
NPI 1902275068
5353 MISSION CENTER RD STE 224
San Diego, CA 92108
(619) 688-5855
✔ PECOS2.7 mi
Irene Coletsos, M.D.
Psychiatry
NPI 1013108869
5333 MISSION CENTER RD STE 105
San Diego, CA 92108
(619) 997-4510
✔ PECOS2.7 mi
Christine Evans, M.D.
Psychiatry
NPI 1346591591
200 W ARBOR DR MAILBOX 8809
San Diego, CA 92103
(619) 233-8500
✔ PECOS✔ Accepts Medicare4.1 mi
Irene Nevarez, NP
Nurse Practitioner
NPI 1003166646
200 W ARBOR DR
San Diego, CA 92103
(800) 926-8273
✔ PECOS✔ Accepts Medicare4.1 mi
Kat Balingit, PSYCHIATRIC NP
Nurse Practitioner
NPI 1538790605
140 ARBOR DR
San Diego, CA 92103
(858) 534-7792
✔ PECOS✔ Accepts Medicare4.1 mi
Kristyn Pellecchia, N.P.
Nurse Practitioner
NPI 1780981266
140 ARBOR DR # 851
San Diego, CA 92103
(619) 543-5895
✔ PECOS✔ Accepts Medicare4.1 mi
Elizabeth Sears-Wiley, NP
Nurse Practitioner
NPI 1215394382
200 W ARBOR DR
San Diego, CA 92103
(858) 534-7792
✔ PECOS✔ Accepts Medicare4.1 mi
Judie Nazareth
Clinical Social Worker
NPI 1780246900
4283 EL CAJON BLVD STE 115
San Diego, CA 92105
(213) 241-3841
✔ PECOS✔ Accepts Medicare4.3 mi
Philip Spreter
Nurse Practitioner
NPI 1861886202
4283 EL CAJON BLVD
San Diego, CA 92105
(619) 521-1743
✔ PECOS✔ Accepts Medicare4.3 mi
Melissa Ruano
Mental Health Counselor
NPI 1194466409
5555 RESERVOIR DR STE 204-A
San Diego, CA 92120
(619) 822-1800
✔ PECOS5.3 mi
Ian Snider, PMHNP
Nurse Practitioner
NPI 1871174748
5555 RESERVOIR DR STE 204-A
San Diego, CA 92120
(619) 822-1800
✔ PECOS✔ Accepts Medicare5.3 mi
Melissa Deer, M.D
Psychiatry
NPI 1043415888
2630 1ST AVE
San Diego, CA 92103
(619) 234-2158
✔ PECOS✔ Accepts Medicare5.5 mi
Alexis Rashdan, LCSW
Clinical Social Worker
NPI 1568941847
3491 KURTZ ST STE 150
San Diego, CA 92110
(619) 320-2404
✔ PECOS5.5 mi
Rachelle Pace, DNP
Nurse Practitioner
NPI 1588334973
35000 GUADALCANAL ST
San Diego, CA 92140
(619) 524-4051
✔ PECOS✔ Accepts Medicare5.8 mi
Mitchell Cuomo, LCSW
Clinical Social Worker
NPI 1275915654
3340 KEMPER ST
San Diego, CA 92110
(760) 227-1418
✔ PECOS5.9 mi
Kathryn Shafer, LMFT
Marriage and Family Therapist
NPI 1063880722
10201 MISSION GORGE RD STE O
Santee, CA 92071
(619) 385-2719
✔ PECOS9.7 mi
See all 72 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Mental Health Systems, Inc.'s NPI number?

The NPI number for Mental Health Systems, Inc. is 1043732944. It was assigned to this organization in the NPPES registry on July 12, 2017. The provider is doing business as City Star ACT.

Where is Mental Health Systems, Inc. located?

Mental Health Systems, Inc. is located at 8775 Aero Dr Ste 132, San Diego, CA 92123. The listed phone number is (858) 573-2600.

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, 24 practice 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.