Okla. Stat. tit. 42, § 42-44: Filing of notice of lien - Enforcement by civil action

A. No such lien shall be effective unless a written notice

containing a statement of the amount claimed, the name and address

of the injured person, the date of the accident, the name and

location of the hospital, and the name of the person or persons,

firm or firms, corporation or corporations alleged to be liable to

the injured party for the injuries received, shall be filed in the

office of the county clerk of the county in which such hospital is

located, on the mechanic's and materialman's docket, prior to the

payment of any monies to such injured person, his attorneys or legal

representatives, as compensation for such injuries; nor unless the

hospital shall also send, by registered or certified mail postage

prepaid, a copy of such notice with a statement of the date of

filing thereof to the person or persons, firm or firms, corporation

or corporations alleged to be liable to the injured party for the

injuries sustained prior to the payment of any monies to such

injured person, the injured person's attorneys or legal

representatives, as compensation for such injuries. Such hospital

shall mail a copy of such notice to any insurance carrier which has

insured such person, firm or corporation against such liability, if

the name and address shall be known. Such hospital shall also send,

by registered or certified mail, a copy of such notice to such

patient upon whom emergency medical or other service has been

performed, if the name and address of such patient shall be known to

the hospital or can with reasonable diligence be ascertained. A

copy of said notice shall be mailed to any attorney for the patient,

provided that the hospital has notice of the name of such attorney.

B. The liens provided for in this section and Section 43 of

this title may be enforced by civil action in the district court of

the county where the lien was filed. Such an action shall be

brought within one (1) year after the hospital becomes aware of

final judgment, settlement or compromise of the claim asserted or

maintained by or on behalf of the injured person. The practice,

pleading and proceedings in the action shall conform to the rules

prescribed by the Oklahoma Pleading Code to the extent applicable.