California

HHS identifies full licensure, temporary-practice laws, reciprocity, compacts, and telehealth registration as different possible cross-state routes. HHS advises verifying the patient's location and obtaining consent before an appointment.

Conditions: Applies as a federal overview for cross-state healthcare delivery; confirm both professional and patient-location jurisdictions.

Limits: This overview does not establish an NP/APRN compact privilege, a PMHNP specialty authorization, state-law exception, or prescribing permission.

DEA registration guidance states that a practitioner must have authority under the applicable state law to handle controlled substances; federal registration does not supply state professional authority.

Conditions: Use only when controlled-substance activity and DEA registration are relevant to the actual practice model.

Limits: The source does not decide individual eligibility, state schedules, a particular drug, registration location, or whether an APRN has state authority.

HHS and the current eCFR text describe a temporary extension allowing a DEA-registered practitioner to prescribe Schedule II–V controlled substances via telemedicine without an in-person medical evaluation only when the rule's requirements are met. The temporary extension ends December 31, 2026.

Conditions: Only the named federal temporary rule and only when each applicable condition is met; current eCFR text is controlling for the rule.

Limits: Does not establish state scope, a patient's location permission, DEA registration, clinical standard of care, drug-specific authorization, or any rule after December 31, 2026. Reverify before January 1, 2027.

CMS's current provider/supplier guide identifies an NPI step, the PECOS online enrollment application, an application fee when applicable, and follow-up with the Medicare Administrative Contractor.

Conditions: Relevant if a provider or practice intends to enroll in or bill Medicare under a described role.

Limits: Not a provider-eligibility decision, approval, credentialing result, reimbursement promise, timing estimate, or commercial/Medicaid payer instruction.

HHS describes covered entities and business associates as the groups subject to HIPAA Rules under the relevant definitions and activities.

Conditions: Assess the actual organization, covered functions, transactions, and business-associate relationships with qualified privacy counsel.

Limits: This source does not decide an individual practice's status, state privacy duties, vendor compliance, or whether a particular contract is sufficient.

The Small Business Administration provides a state and territory selector that points users to registration-office websites.

Conditions: A starting point for finding the selected jurisdiction's registration office.

Limits: Does not state whether a particular professional practice needs an entity, which entity is lawful, the applicable fees, or local permit obligations.

The IRS describes an Employer Identification Number as a federal tax ID for businesses and certain other entities and provides its official application route.

Conditions: Check the IRS instructions for the entity and facts before applying.

Limits: The resource does not determine whether an EIN is required in an individual's circumstances or advise on entity or tax treatment.

Medicaid.gov directs users to select a state or jurisdiction to locate its Medicaid and CHIP agency contacts.

Conditions: Use the jurisdiction's agency and provider-enrollment materials for the intended provider type and service.

Limits: This directory is not a provider enrollment source and does not determine provider type, credentialing, participation, coverage, or payment.

HHS suggests planning around patient location, local emergency contacts, other-provider contacts, and a disconnection plan before telebehavioral visits.

Conditions: Optional operational planning reference; adapt only with qualified clinical, legal, privacy, and organizational review.

Limits: This is not a law, medical recommendation, crisis protocol, or substitute for jurisdiction-specific duties.