R51.9
BillableHeadache, unspecified
Headache, unspecified
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Facial pain NOS
Excludes 2
Conditions not included here, but the patient may have both
- abnormal findings on antenatal screening of mother (O28.-)
- certain conditions originating in the perinatal period (P04-P96)
- signs and symptoms classified in the body system chapters
- signs and symptoms of breast (N63, N64.5)
- atypical face pain (G50.1)
- migraine and other headache syndromes (G43-G44)
- trigeminal neuralgia (G50.0)
Also Known As / Clinical Terms
SNOMED CT
- Occipital headache330007
- Sinus headache4969004
- Referred pain6617009
- Postseizure headache13322008
- Cephalalgia25064002
- Cephalgia25064002
- Cephalodynia25064002
- HA - Headache25064002
- Head pain25064002
- Headache25064002
- Pain in head25064002
- Pulsatile pain29695002
- Throbbing pain29695002
- Post-fit state31758001
- Post-ictal state31758001
- Post-seizure state31758001
- Postictal state31758001
- Aural headache38823002
- Temporal headache41413006
- Nasal headache44538002
- Shooting pain49575005
- Scalp tenderness75851004
- Tenderness of scalp75851004
- Alpine sickness87284002
- Altitude sickness87284002
- Effects of high altitude87284002
- Hypobaropathy87284002
- Illnesses due to high altitude effects87284002
- Mountain sickness87284002
- Hindbrain hernia headache95659007
- Face ache95668009
- Face pain95668009
- Facial pain95668009
- Pain in face95668009
- Pain of face95668009
- External compression headache103007003
- Headache due to external compression of head103007003
- Postpartum headache103008008
- Cold stimulus headache103009000
- Headache due to cold exposure103009000
- Dental headache112101004
- Headache due to intracranial disease129610005
- Viral headache162211001
- Generalised headache162299003
- Generalized headache162299003
- One sided headache162300006
- Unilateral headache162300006
- Bilateral headache162301005
- Parietal headache162304002
- Aching headache162307009
- Throbbing headache162308004
- Shooting headache162309007
- Morning headache162310002
- Heavy head162311003
- Obstetric spinal and epidural anaesthesia-induced headache200071001
- Obstetric spinal and epidural anesthesia-induced headache200071001
- Headache disorder230461009
- Low pressure headache230478000
- PDPH - Post dural puncture headache230479008
- Post dural puncture headache230479008
- Post-dural puncture headache230479008
- Headache following myelography230480006
- Postmyelography headache230480006
- Frontal headache267096005
- Tenderness over maxillary sinus277238004
- Tenderness over frontal sinus277241008
- Facial tenderness278995006
- Tenderness of face278995006
- Maxillary sinus pain301356002
- Frontal sinus pain301357006
- Pain of head and neck region301365009
- Tenderness of respiratory structure301389002
- Tenderness of head and neck region301401001
- Tenderness of neck309522006
- Finding of headache character364760007
- Headache character - finding364760007
- Muscle contraction headache398126006
- Muscular headache398126006
- Headache caused by high altitude425422007
- Pain radiating to head425839000
- Chronic facial pain432615008
- Chronic pain in face432615008
- Referred pain in face449313005
- Buccal region pain473008002
- Pain in cheek473008002
- Pain in chin473434003
- Craniofacial pain699046000
- Headache attributed to reversible cerebral vasoconstriction syndrome703182002
- Headache due to reversible cerebral vasoconstriction syndrome703182002
- Intermittent headache712826000
- Frequent headache712831003
- Acute facial pain735937001
- Acute pain in face735937001
- Acute headache735938006
- Chronic orofacial pain762454002
- Chronic primary orofacial pain762593008
- Chronic secondary facial pain762604001
- E621 intolerance782338006
- Intolerance to monosodium glutamate782338006
- MSG (monosodium glutamate) intolerance782338006
- Monosodium glutamate intolerance782338006
- Sodium hydrogen L-glutamate intolerance782338006
- Unilateral headache on left side of head1119294003
- Unilateral left sided headache1119294003
- Unilateral headache on right side of head1119295002
- Unilateral right sided headache1119295002
- Carbon monoxide-induced headache1259052007
- Headache caused by carbon monoxide1259052007
- Delayed alcohol-induced headache1259867005
- Delayed headache caused by alcohol1259867005
- Headache due to intracranial neoplasm1260321008
- Headache due to non-traumatic subarachnoid haemorrhage1260323006
- Headache due to non-traumatic subarachnoid hemorrhage1260323006
- Headache due to spontaneous subarachnoid haemorrhage1260323006
- Headache due to spontaneous subarachnoid hemorrhage1260323006
- Headache due to arterial hypertension1260345007
- Headache due to hypertension1260345007
- Headache due to acute angle closure glaucoma1260348009
- Headache caused by monosodium glutamate1263586000
- Monosodium glutamate-induced headache1263586000
- Chronic daily headache458241000124102
- Chronic orofacial pain due to disorder39151000087103
- Chronic secondary orofacial pain39151000087103
- Chronic orofacial pain due to infectious disease44511000087105
- Chronic orofacial pain due to nonvascular intracranial disorder39651000087108
- Chronic secondary orofacial pain due to nonvascular intracranial disorder39651000087108
- Chronic orofacial pain due to temporomandibular joint disorder39721000087109
- Daily headache571000119103
- Neoplasm related pain98921000119102
- Pain due to neoplastic disease98921000119102
- Pain related to neoplasm98921000119102
UMLS
- CephalalgiaC0018681
- CephalalgiasC0018681
- CephalgiaC0018681
- CephalgiasC0018681
- CephalodyniaC0018681
- CephalodyniasC0018681
- Cranial PainC0018681
- Cranial PainsC0018681
- HA - HeadacheC0018681
- Head PainC0018681
- Head PainsC0018681
- Head painC0018681
- HeadacheC0018681
- Headache (finding)C0018681
- Headache NOSC0018681
- Headache, unspecifiedC0018681
- HeadachesC0018681
- Pain headC0018681
- Pain in headC0018681
- Pain, CranialC0018681
- Pain, HeadC0018681
- Pains, CranialC0018681
- Pains, HeadC0018681
- ache headC0018681
- cephalalgiaC0018681
- cephalgiaC0018681
- cephalgiasC0018681
- cephalodyniaC0018681
- cranial painC0018681
- head acheC0018681
- head painC0018681
- head painedC0018681
- head painsC0018681
- headacheC0018681
- headachesC0018681
- pain in headC0018681
- Eyebrow painC0015468
- Face PainC0015468
- Face acheC0015468
- Face painC0015468
- Facial PainC0015468
- Facial painC0015468
- Facial pain NOSC0015468
- Pain in faceC0015468
- Pain in face (finding)C0015468
- Pain of faceC0015468
- Pain, FaceC0015468
- Pain, FacialC0015468
- ache faceC0015468
- face acheC0015468
- face painC0015468
- faces painC0015468
- facial painC0015468
- of face painC0015468
- pain faceC0015468
- pain facialC0015468
- pain in faceC0015468
Frequently Asked Questions
What is ICD-10 code R51.9?
ICD-10-CM code R51.9 represents "Headache, unspecified". It is a billable/specific code that can be used on a claim.
Is R51.9 a billable code?
Yes, R51.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is R51.9 in?
R51.9 is in Chapter 18: Symptoms, Signs and Abnormal Clinical and Laboratory Findings (codes R00-R99).
What SNOMED CT codes does R51.9 map to?
R51.9 maps to 79 SNOMED CT concepts: 162307009, 735937001, 735938006, 87284002, 38823002, and 74 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for R51.9?
R51.9 is linked to 2 UMLS Concept Unique Identifiers: C0018681, C0015468. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.