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AJP-4.2

AJP-4.2 NATO's doctrine for medical support

NATO commanders and staffs planning and conducting medical support to an Alliance operation, not a commercial supplier directly

AJP-4.2 is NATO's Allied Joint Publication for medical support to Alliance operations, addressed to commanders and staffs and binding nations through STANAG 2228, with the detailed procedures held in the AJMedP series beneath it.

Edition
A
Published
2026-07

What it is

AJP-4.2, Allied Joint Doctrine for Medical Support, is NATO's level 2 doctrine for planning, preparing and conducting medical support to Alliance operations. It builds on the principles set out in AJP-4, Allied Joint Doctrine for Sustainment of Operations, to which it is directly subordinate, and it follows the framework of AJP-01 and the principles and processes of AJP-3 and AJP-5. Nations record their agreement to use it through STANAG 2228. Edition A, Version 1, promulgated 14 July 2026, supersedes AJP-4.10, Edition C, Version 1 - part of a wider renumbering of the AJP-4 sustainment series that also produced AJP-4.1 (logistics), AJP-4.3 (host-nation support) and AJP-4.4 (movement).

Who this addresses, and how it reaches a supplier

The doctrine is intended, in its own words, "to provide guidance to commanders and their staffs to facilitate clear and common understanding and flexible decision-making." It is written primarily for the operational level, with utility at both the strategic and tactical levels, and it also serves as "a reference for civilian mission participants." It never names a supplier, manufacturer or acquirer as its audience. A commercial party appears only in passing, as one of several possible sources the medical support system might draw on: "the medical support system could also include arrangements to use HN, other nation, multinational or contracted healthcare services," and contracted support is mentioned again as one option during redeployment and in achieving continuity of care. None of that creates an obligation for a contracted provider directly - what a supplier is actually asked to do comes from a specific contract, not from this doctrine.

Six components, four roles, one continuum of care

A medical support system "must consist of" six components: command and control, communications and information management, force health protection, military health care, medical evacuation, and medical logistics. Medical treatment is organised into four roles, from Role 1 (routine primary care, first aid, triage, and a national responsibility close to the supported troops) through Role 4 (the full spectrum of definitive care, normally delivered in the patient's home nation). Patients move through what the doctrine calls a continuum of care, an organisational pattern rather than a fixed sequence, from the point of injury through treatment, rehabilitation and, where possible, return to duty. The Preface is explicit that AJP-4.2 "does not contain detailed procedures" for any of this: the procedures sit in the Allied Joint Medical Publications, the Allied Medical Publications, Allied Dive Publications and Allied Aeromedical Publications beneath it.

The legal and ethical frame

The Geneva Conventions and their additional protocols protect medical personnel and facilities, including maritime vessels and aircraft, and assign distinctive protective emblems, so long as medical personnel act exclusively in a humanitarian function. Medical personnel also have a duty to comply with their own national laws and professional regulations, and NATO nations must confirm regulatory authority and permission to practise before medical personnel provide care outside their national jurisdiction. The doctrine also sets out principles for the medical care of persons deprived of their liberty (whose health "shall not be endangered," and for whom medical procedures not indicated by their state of health are "illegal and strictly forbidden") and for non-combatant or civilian patients, who receive emergency care up to life, limb or function-preserving surgery within a treatment facility's means and its primary military task, with the aim of returning the lead for their care to the host nation's own health system as early as possible.

Command, communications and force health protection

A joint medical staff, integrated into the headquarters structure, covers medical planning and operations, patient evacuation coordination, force health protection, medical intelligence, host-nation liaison, medical logistics and CBRN medical support. A Medical Advisor gives the commander direct medical advice; a Medical Director heads medical services in a formation or area of operations; and, where established, a patient evacuation coordination cell harmonises medical evacuation activity. Communications and medical information management covers a medical communication and information system that has to interface with non-NATO entities and the civilian health sector, resist cyber-attack, and protect patient-data confidentiality under national regulations, feeding into a recognized medical picture that forms the medical layer of NATO's common operational picture. Force health protection, described as a subset of the broader force protection function, covers program areas including preventive medicine, communicable disease control, biosecurity, infection prevention and control, occupational and environmental health, hygiene and sanitation, food and water protection, mental and physical health readiness, and oral health and dental fitness.

Military health care, medical evacuation and medical logistics

Military health care distinguishes primary, secondary and definitive health care, and works through emergency medical care, acute care, routine medical care, rehabilitative care, palliation and care of the dying, and prolonged care where evacuation is delayed. Medical evacuation is described by where it sits along the continuum of care - forward, tactical, rearward and strategic - and is kept distinct from casualty evacuation (CASEVAC), the non-medically supervised movement of casualties, which the document calls "neither a medical capability, nor a medical responsibility." Medical logistics "embraces planning, procurement, storage, movement, distribution, maintenance and disposal of health care products, and medical materiel," primarily a national responsibility, with blood products, medical gases, medical waste and stretchers named as categories needing particular regulatory attention.

Planning considerations an auditor of a medical plan would expect to see

Medical staff contribute to the joint operations planning process from the outset, and planning has to account for a population at risk that can extend to contractors, international-organisation staff, prisoners of war and displaced civilians, not just a force's own personnel. Special planning considerations named in the doctrine include mass casualty situations, major medical incidents, large-scale patient flow, medical support in a CBRN environment, special operations forces medical support, arrangements with host nations and other non-NATO medical entities, and veterinary care for military working animals. The document also sets planning timelines for the fastest tiers of trauma care, which a specific operation's own medical planning process applies when siting medical evacuation assets and treatment facilities - detail that belongs to that planning process rather than to this page.

How you get it

AJP-4.2 is published by the NATO Standardization Office and, like every NATO standardization document, carries no charge. The NSDD listing for AJP-4.2 is the authoritative source, and national standardization authorities can also supply a copy. We credit NATO for the catalogue and neither sell nor host a copy ourselves.

Where it sits among related publications

AJP-4.2 sits beneath AJP-4, AJP-01, AJP-3 and AJP-5, and alongside sibling publications including AJP-4.3 (host-nation support) and AJP-4.4 (movement). Beneath it sit the nine Allied Joint Medical Publications that carry the detailed procedures this doctrine deliberately leaves out: AJMedP-1 (medical planning), AJMedP-2 (medical evacuation), AJMedP-3 (medical intelligence), AJMedP-4 (force health protection), AJMedP-5 (medical communications and information systems), AJMedP-6 (civil-military medical interface), AJMedP-7 (CBRN medical support), AJMedP-8 (military health care) and AJMedP-9 (multinational medical support), each in turn covered by a further layer of Allied Medical Publications on specific topics from blood products to ambulance design. The standards explorer lists the rest of what sits alongside this document.

How we help

AJP-4.2 is doctrine written for NATO commanders and staffs, so there is nothing here for a company to implement directly. Its value to a reader is context: understanding why a NATO or national medical contract is shaped the way it is, and which of the more detailed AJMedPs or AMedPs beneath AJP-4.2 a particular requirement is actually drawn from.

Where a company does have a role, as a contracted provider of medical, ambulance, medical-logistics or related services under a NATO or national contract, what it can reasonably be asked to evidence is its own internal process: the procedures it follows, the training records for its people, and the documentation a contracting officer or customer audit expects to see. ComplyTrain is a quality and compliance platform for exactly that kind of internal record-keeping: controlled procedures, training records, corrective actions and the document trail that work generates, kept current and ready to produce.

What we do not do: we provide no clinical capability and do not perform medical support ourselves. The delivery of patient care, the operation of medical evacuation assets, and the day-to-day conduct of a medical contract in theatre happen in the practice of medicine and logistics, not in software, and AJP-4.2 places none of that on a supplier directly in any case. What applies to a specific contract, and which document actually binds a given supplier, is set by that contract and the customer's quality clause, never by us. The standards explorer shows what else sits in the catalogue alongside AJP-4.2, and we are glad to talk through what your contract actually requires.

Standards it references

Questions

Does AJP-4.2 apply to my company?

Not directly. AJP-4.2 is guidance for NATO commanders and staffs on planning and running medical support to an operation; it never names a supplier, manufacturer or acquirer as its audience. A company's obligations come from the specific contract a customer writes, not from AJP-4.2 itself.

Is AJP-4.2 a STANAG?

No. AJP-4.2 is the Allied Joint Publication, the doctrine itself. STANAG 2228 is the Standardization Agreement by which NATO nations record their agreement to use it. The STANAG is the cover; AJP-4.2 is what it covers.

What is the difference between AJP-4.2 and the AJMedP series?

AJP-4.2 is level 2 doctrine: it sets out the terms, relationships and processes commanders and staffs need to plan and prepare medical support, but it does not contain detailed procedures. Those sit in the nine Allied Joint Medical Publications (AJMedP-1 through AJMedP-9) beneath it, each covering one of the components of medical support - planning, evacuation, intelligence, force health protection, communications, civil-military interface, CBRN support, military health care and multinational support - in far more depth.

Does ComplyTrain map to AJP-4.2?

No. AJP-4.2 has no certification, audit or accreditation scheme for a company to map a product against; the only certification the document names is a nation's certification of the units it contributes to a multinational force. Where ComplyTrain helps is with the internal procedures, training records and audit trail a defence contract's own quality clause requires, whatever standard that clause names.

How current is this edition?

This page describes Edition A, Version 1, promulgated 14 July 2026, effective on receipt. It supersedes AJP-4.10, Edition C, Version 1, as part of a restructuring of the whole AJP-4 sustainment series into a clearer numbering: AJP-4.1 for logistics, AJP-4.2 for medical support, AJP-4.3 for host-nation support, and AJP-4.4 for movement.