Can LMSW do therapy in Texas?

Yes, but only when under a formal supervision plan.

The clinical social worker may engage in Baccalaureate Social Work practice and Master's Social Work practice. Clinical treatment methods may include but are not limited to providing individual, marital, couple, family, and group therapy, mediation, counseling, supportive counseling, direct practice, and psychotherapy. Clinical social workers are qualified and authorized to use the Diagnostic and Statistical Manual of Mental Disorders (DSM), the International Classification of Diseases (ICD), Current Procedural Terminology (CPT) Codes, and other diagnostic classification systems in assessment, diagnosis, treatment and other practice activities.

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An LBSW or LMSW who is not recognized for independent practice may practice for remuneration in a direct employment or agency setting but may not work independently, bill directly to patients or bill directly to third party payers, unless the LBSW or LMSW is under a formal supervision plan.

Source: Texas Administrative Code