Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert Charles Southmayd, D.O.

Internal Medicine Physician in Ceres, CA · enumerated 2006 · practices at Aegis Treatment Centers, LLC.

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

National Provider Identifier

1982700969

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Registry record

Entity type Individual (Type 1)

Name Robert Charles Southmayd

Credential D.O.

Sex Male

Practice address 1768 Mitchell Rd Ste 301, Ceres, CA, 95307

Phone (209) 353-4838

Enumeration date Sep 16, 2006

Last updated in NPPES Oct 22, 2025

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 5298 (CA) Primary

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 20A5298 (CA) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
911803606	Other	CA	BLUE SHIELD
00AX52980	Medicaid	CA	-
160038160	Other	CA	RAILROAD MEDICARE

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.

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Frequently asked questions

Where does Robert Southmayd practice?

The practice location on file with NPPES is in Ceres, CA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Robert Southmayd?

The National Provider Identifier (NPI) for Robert Southmayd is 1982700969, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Ginned Williams Addiction (Substance Use Disorder) Counselor · Ceres, CA NPI 1942363585 Dourine Isqiel Licensed Vocational Nurse · Ceres, CA NPI 1477008506 Dyana Inthavong Licensed Vocational Nurse · Ceres, CA NPI 1497277925 Frank Silva Addiction (Substance Use Disorder) Counselor · Ceres, CA NPI 1912478801 Angelique Garcia Addiction (Substance Use Disorder) Counselor · Ceres, CA NPI 1023582327 Cleveland Crowley Addiction (Substance Use Disorder) Counselor · Ceres, CA NPI 1225593841 Kayla Flores Licensed Vocational Nurse · Ceres, CA NPI 1538716220 Aegis Treatment Centers, LLC Methadone Clinic · Ceres, CA NPI 1932759289

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-10-22.