Coding guide · 11 min read
Post-Concussion Syndrome ICD-10 Code: What F07.81 Means
The post-concussion syndrome ICD-10 code is F07.81, which the code set lists as Postconcussional syndrome. If that was the whole question, that's the whole answer, and you can stop reading here.
The rest of this page is what comes after the code. Coders and billers need the two instructions that sit on the F07.81 entry itself — a Code First note and an Excludes1 — because both change how the code is used, and because F07.81 is not the code for the concussion. Patients usually arrive for a different reason: F07.81 turned up on a bill, an after-visit summary or a denial letter, and it isn't obvious what it says about them.
Either way, start from this. A diagnosis code is administrative shorthand. It is not a prognosis, not a severity score and not a treatment plan.
What is the ICD-10 code for post-concussion syndrome?
The ICD-10-CM code for post-concussion syndrome is F07.81, titled Postconcussional syndrome. It describes the syndrome that continues after a head injury rather than the injury event, and it sits in the F01–F99 range of the code set rather than in the injury chapter.
Whether you searched for it as post concussive syndrome, postconcussional syndrome or post-concussion syndrome, it resolves to the same code. The code set uses the older one-word spelling; clinicians mostly write "post-concussion syndrome"; and the term you will increasingly see in the research literature is persisting post-concussive symptoms. Three names, one condition, one code.
This page stays with the code. If what you actually want is the condition — what the symptoms are, what the course looks like and what is worth doing about it — our guide to what post-concussion syndrome involves is the better starting point, and most readers who land here need that page more than they need this one.
What does F07.81 actually mean, and what does "Code First" require?
F07.81 names the persisting syndrome, and its entry carries a Code First instruction for the underlying physiological condition. That means F07.81 is not built to stand alone on a record: the code set expects the underlying condition to be identified and sequenced ahead of it.
A Code First note is the code set's way of saying "this code is the second half of a sentence." The first half — the physiological condition the syndrome followed from — has to be there too. For a reader looking at a claim or a visit summary, that is the ordinary reason a single concussion generates more than one code. It is not two separate diagnoses of two separate injuries.
Note what the entry does not supply. The code set gives a title and a set of instructions. It does not list which symptoms qualify, how many of them are needed, or how severe they have to be — that description lives in the clinical documentation, not in the code. Anything about sequencing, encounter type or payer-specific rules should be confirmed against the current ICD-10-CM release and the payer's own policy. This page is educational; it isn't billing advice, and it can't tell you how any particular claim will be handled.
When are symptoms after a head injury an emergency?
Stop reading about codes and get emergency care if someone with a head injury has a headache that gets worse and does not go away, or loses consciousness, looks very drowsy or cannot be woken up — the CDC lists those among its danger signs. In a baby or young child, the CDC adds signs including crying that will not stop and cannot be soothed, and refusing to nurse or eat.
Those danger signs belong to the acute injury rather than to the persisting syndrome this code describes. We put them here anyway, because people arrive at a coding page at every stage — some of them hours after a hit, holding a discharge sheet. If you're trying to work out whether what you're seeing counts, our plain-language guide to the symptoms of concussion sets out what is expected and what is not.
Why can't F07.81 and a current concussion code be used together?
Because the F07.81 entry carries an Excludes1 note for current concussion (brain). An Excludes1 is the code set's hard form of exclusion — a "not coded here" note rather than a "see also" — so the two are treated as alternatives at the same encounter, not as companions.
The logic is easier to see than the notation. F07.81 exists to describe what is still going on after the concussion. A current concussion code exists to describe the concussion. The code set does not want a record asserting both at once, because that would be claiming the injury is happening now and has already resolved into an aftermath.
Where that line falls in a specific record is a documentation question and a payer question, and the authorities are the current ICD-10-CM release and the plan's own policy — not a guide. What this page can tell you is what the entry says, and it says the exclusion is there.
Which ICD-10 code covers the concussion injury itself?
The injury is coded from the S06.0X series, in the S00–T88 injury chapter; the specific code S06.0X0A is Concussion without loss of consciousness, initial encounter. The final letter is a 7th character, and in S06.0X0A that A is the part of the code carrying "initial encounter."
The 7th character is why injury codes look long and slightly alien compared with F07.81. It encodes the encounter, not the injury — the same injury is described by a different full code depending on which encounter is being recorded. Which characters exist and which one applies to a given visit is set by the current code release and by what the note documents, and it should be checked there rather than taken from any article.
Here is how the two codes divide the work:
| F07.81 | S06.0X0A | |
|---|---|---|
| Title in the code set | Postconcussional syndrome | Concussion without loss of consciousness, initial encounter |
| What it describes | The syndrome that persists after the injury | The concussion itself, at the initial encounter |
| Where it sits | F01–F99 range | S00–T88 injury chapter |
| Instruction on the entry | Code First the underlying physiological condition | 7th character A carries "initial encounter" |
| Exclusion on the entry | Excludes1: current concussion (brain) | — |
| Roughly when it's used | Once symptoms have outlasted the injury and are the reason for the encounter | At the encounter for the concussion itself |
When does a case move from the injury code to F07.81?
The code set does not answer this. Neither the F07.81 entry nor the S06.0X0A entry states a number of days or weeks that has to pass, so there is no waiting period to look up — the timing follows the clinical picture and the documentation.
The boundary that does exist is a clinical one, and it comes from the concussion literature rather than from ICD-10-CM. "Persisting" symptoms have been defined as those lasting over two weeks in adults and over four weeks in children. That is the line clinicians think in. It is not a coding rule, and it should not be quoted as one.
Keeping those two things apart matters, because they get blurred constantly. The clinical definition tells a clinician when a case has stopped behaving like an ordinary recovery. The code set tells a coder how to label what the clinician documented. They are answering different questions, and only one of them has a number in it.
For scale: up to 30% of children and adolescents have symptoms lasting four weeks or longer, and a smaller group — 10 to 15 percent of adults — still have symptoms beyond a year. If you're trying to work out where in that arc you or your child sits, our walk-through of the stages of concussion recovery maps the usual sequence, and there's a separate guide for concussion signs in children and toddlers.
What does F07.81 mean if you're the patient reading a bill?
It means your clinician recorded that symptoms from a head injury have continued past the injury — that is the entire claim the code makes. It is a name for the problem, not a measurement of how bad it is, how long it will last, or whether anyone believes you.
The part that unsettles people is the letter. F07.81 sits in the F01–F99 range rather than in the injury chapter, and readers who expected an injury code sometimes take that as a quiet suggestion that the symptoms are considered psychological. That reading is not supported by the entry itself: the same entry carries the Code First instruction pointing at an underlying physiological condition. The placement is a fact about how the code set is organized, not a verdict on the cause of your symptoms.
The second thing worth knowing is why there is more than one code. That is the Code First instruction doing its job — the record is expected to carry the underlying condition as well as the syndrome. Two codes on a claim for one head injury is the ordinary pattern, not a sign that something has been double-counted.
And if the code is the first time anyone has put a name to what you've been living with: a lot of people go months being told to rest and wait before the phrase post-concussion syndrome appears anywhere in writing. Seeing it on paper is not a downgrade. Often it's the point at which the condition finally gets treated as a condition.
Does a post-concussion syndrome diagnosis affect insurance or disability paperwork?
A diagnosis code identifies a condition; it does not by itself decide coverage, benefits or the outcome of a claim, and nothing on this page can predict what a given plan or program will do. What carries weight in paperwork is the clinical documentation behind the code — what was assessed, what was found, and how it changed over time.
Denial letters often quote a code, which makes the code look like the reason. Usually it is the label on the claim rather than the rationale for the decision; the rationale is stated separately, in its own paragraph, and that paragraph is the part worth reading twice. If the reason is unclear, the two people who can actually answer are your clinician's billing office and your plan — in writing, if you can get it in writing.
One thing does tend to help across every kind of form, and it costs nothing: keep your own record. Injury date, what happened, which symptoms appeared and when, what you tried, what changed. Contemporaneous notes made by you are not a substitute for a clinician's documentation, but they make that documentation easier to produce accurately, and they close the gap when the injury happened long before anyone wrote a code down.
What does a documented post-concussion syndrome diagnosis need?
The diagnosis is clinical: it rests on a documented injury event, a symptom picture that has persisted, and an assessment careful enough to rule the alternatives in or out. The American Congress of Rehabilitation Medicine published updated diagnostic criteria for mild traumatic brain injury in 2023, and that framework is what a thorough assessment works from.
Two things surprise people about what "documented" means here. The first is imaging. A normal scan does not weaken the diagnosis, and neither does no scan at all — head CT should not be routinely performed to assess mild TBI, according to the American Academy of Family Physicians' summary of the CDC guideline. Concussion is not a diagnosis that a scanner makes.
The second is that symptoms are measured, not just listed. The Post-Concussion Symptom Scale is a standard instrument of 22 symptoms rated from 0 to 6, and a score repeated over several visits shows direction in a way that "still not right" never will. Bring your own version of that to appointments if nobody has offered you one.
What follows from a careful assessment is a plan aimed at your particular symptom profile. Treatment for persisting symptoms is interdisciplinary and individually tailored — vestibular, vision-oculomotor, behavioral health and cognitive rehabilitation, matched to what is actually wrong — rather than one protocol applied to everyone. That is also why the choice of clinician matters so much; our two-minute specialist quiz is built to narrow that down before you start phoning.
Where can you get assessed for symptoms that haven't settled?
Look for a clinician or program that assesses concussion specifically, rather than a general appointment that ends in "give it more time." Across the 3,205 verified listings in our directory, 1,117 describe multidisciplinary concussion care, 1,069 offer vestibular and balance assessment, 929 offer neuropsychology or cognitive testing, and 405 offer vision or neuro-optometry.
Those numbers carry a warning as well as an invitation. Vision care is the thinnest widely-needed service on the map — 405 listings for the entire country — and only 186 listings in our directory offer vision and vestibular work in the same building. Since roughly one in five people with post-concussion syndrome has symptomatic convergence insufficiency, a lot of people will be booking two appointments in two places rather than one. Worth knowing before you assume a single clinic covers it.
Headache is the other common gap: 305 listings, about one in ten, name headache or migraine as a service, which is why our guide to treating headache after concussion exists as its own page. And if distance is the obstacle, 521 listings state that they offer telehealth — noticeably more common among the neuropsychology listings (155 of 929) than among the vision ones (40 of 405), which follows, given how hands-on vision work is.
So: take the code for what it is — a label, applied to something real, in a system that needed a name for it. Then do the thing the code cannot do for you and get the symptoms assessed properly. You can search our directory of 3,205 verified concussion providers across 1,010 cities and all 50 states plus DC, filter to the kind of care you need, and go in with a list of questions instead of a code number.
And if you are on the coding side of this — a clinician or practice manager whose office bills F07.81 regularly — you can get your clinic listed in the directory. Inclusion is free, listings are never ranked by payment, and each one is verified against your own public website.
Find a concussion specialist near you
Search 3,205 verified concussion clinics and specialists across all 50 states — filter by services like vestibular therapy, vision therapy, and neuropsychology.
Browse the largest state directories: California (148) · South Carolina (136) · Pennsylvania (125).
Not sure which kind of specialist your symptoms point to? Take the 2-minute specialist quiz →
Frequently asked questions
Is there a different ICD-10 code for post-concussive syndrome?
No — post-concussive syndrome, postconcussional syndrome and post-concussion syndrome all resolve to F07.81. The code set uses the one-word spelling "Postconcussional syndrome" as the official title, but the condition being named is the same one.
What is the ICD-10 code for concussion without loss of consciousness?
S06.0X0A is "Concussion without loss of consciousness, initial encounter" in ICD-10-CM. The final A is a 7th character, and it is the part of the code that carries "initial encounter"; which 7th character applies to a given visit depends on the current code release and what the note documents.
Is F07.81 a mental health diagnosis?
F07.81 sits in the F01–F99 range of the code set rather than in the injury chapter, which is a fact about how ICD-10-CM is organized rather than a statement about the cause of symptoms. The same entry carries a Code First instruction pointing at an underlying physiological condition.
Why are there two codes on the bill for one concussion?
The F07.81 entry carries a Code First instruction for the underlying physiological condition, so the record is expected to identify that condition as well as the syndrome. Two codes on a claim for one head injury is the ordinary pattern, not a sign of double-counting.
Does an ICD-10 code tell you how severe a concussion was?
No. A diagnosis code identifies a condition and nothing more — it is not a severity score, a prognosis or a treatment plan, and the code set attaches no timeline to F07.81. Severity and progress are recorded in the clinical documentation, often using a repeated symptom scale.
Where can you find a clinician who assesses persisting concussion symptoms?
Look for a clinician or program that assesses concussion specifically rather than a general appointment. Across the 3,205 verified listings in our directory, 1,117 describe multidisciplinary concussion care and 1,069 offer vestibular and balance assessment, spread across 1,010 cities and all 50 states plus DC.
Educational content only — not a substitute for professional medical advice, diagnosis, or treatment. Reviewed by Jon MacKay, PharmD, BCACP against current clinical guidance; last updated August 2026.