If your usual or referral practice is outside Missouri, ask the insurer whether that licensed veterinarian and location satisfy the policy. The treatment location is not automatically the state in which your household’s policy is issued. Do not change your home address in the application just to match the clinic.
Also ask the practice about deposits, payment at discharge and whether it participates in any proposed direct-payment arrangement. An insurer’s willingness to reimburse an eligible visit does not mean the clinic will wait for that reimbursement.
These are distinct kinds of statements: one concerns where care may qualify, the other how money flows. Confirm both for the contract you actually choose.