What it is
What STANAG 2598 covers
STANAG 2598 is the NATO standardization agreement that gives force to AJMedP-8, Edition A, the Allied joint publication setting out doctrine for military health care (MHC). A STANAG is not itself a technical specification: it is the agreement by which NATO nations commit to implement one, and the actual doctrine sits in the Allied Publication it covers. This STANAG responds to an interoperability requirement stated plainly in the document: "to standardize the continuum of care that covers the military member from enlistment, through the full spectrum of military duties in garrison and in the deployed environment and through retirement of the member." That continuum spans preventive medicine, acute, rehabilitative and mental health care, and it is meant to support military missions from major combat operations through humanitarian assistance. Read plainly, the STANAG exists so that NATO nations deliver a common continuum of care to their service members, not so that a piece of equipment or a facility is built or bought to a single national standard.
This is Edition 1, promulgated 8 February 2018. The document states plainly that it "does not supersede any document."
Who ratifies it, and how it takes effect
The mechanism that matters here: a STANAG binds a nation, not a supplier or an individual clinician. Nations "are invited to examine their ratification of the STANAG and, if they have not already done so, advise the NSO of their intention regarding its implementation," and are "requested to provide to the NSO their actual STANAG implementation details." Once ratified, "this STANAG is effective upon receipt and ready to be used by the implementing nations and NATO bodies," and it "will be considered implemented when a nation has issued the necessary orders/instructions to its forces and put into effect." Nations are "strongly encouraged to utilize the guidelines and recommendations included in this STANAG," which the cover itself describes as representing "the latest in evidence based approach to patient care" while also noting that they "encompass a summary of military healthcare doctrine but not a comprehensive review."
Participating nations agree to implement AJMedP-8 itself, which is where the doctrine actually lives; this STANAG is the agreement to use it, not the doctrine.
Reporting and review
Nations report their effective implementation "using the form in Annex H to AAP-03(J)"; partner nations report their adoption of the STANAG the same way, "using the form in Annex G to AAP-03(J)." The STANAG "is to be reviewed at least once every three years," with the result "recorded within the NSDD," and nations or NATO bodies may propose changes at any time through a standardization proposal to the tasking authority.
How it's evaluated
No certification exists here, and the document names none. What it describes is a national ratification, implementation and review cycle run through NATO's own machinery, not an audit against this STANAG as such. How well a nation's military health service actually delivers the AJMedP-8 doctrine is a matter for that nation's own medical command structure and any coalition or customer quality clause, not an external certification scheme.