ICD-10-CM Alphabetic Index · FY 2026 Letter B
Index Terms Starting With B ICD-10-CM
Home › ICD-10-CM Codes List › Index to Diseases and Injuries › BThe letter B section of the FY 2026 Alphabetic Index carries 401 main terms , from Baastrup's disease to Bywaters' syndrome. Terms with a direct code link straight to the code page, cross references point to the main term that holds the codes, and terms with a handful of sub-entries render in full right here. The largest terms open their own full index page.
✓ Built from the official CMS FY 2026 index file Effective Oct 1, 2025 – Sep 30, 2026
Baastrup's disease Cross-ref See: Kissing spine Babington's disease (familial hemorrhagic telangiectasia) Code I78.0 Babinski's syndrome Code A52.79 Baby Sub-entries
Bacillary Cross-ref See: condition Bacillus Sub-entries see also Infection, bacillus anthracis infection
A22.9 coli infection
B96.20 see also Escherichia coli Back Cross-ref See: condition Backache (postural) Sub-entries M54.9 Backflow Cross-ref See: Reflux Backward reading (dyslexia) Code F81.0 Bacteremia Sub-entries R78.81 Bactericholia Cross-ref See: Cholecystitis, acute Bacterid, bacteride (pustular) Code L40.3 Bacterium, bacteria, bacterial Sub-entries
agent NEC, as cause of disease classified elsewhere
B96.89 in blood see Bacteremia
in urine see Bacteriuria
Bacteriuria, bacteruria (asymptomatic) Code R82.71 Bacteroides Sub-entries
fragilis, as cause of disease classified elsewhere
B96.6 Bad Sub-entries
heart see Disease, heart
trip
due to drug abuse see Abuse, drug, hallucinogen
due to drug dependence see Dependence, drug, hallucinogen
Baelz's disease (cheilitis glandularis apostematosa) Code K13.0 Baerensprung's disease (eczema marginatum) Code B35.6 Bagasse disease or pneumonitis Code J67.1 Baker's cyst Cross-ref See: Cyst, Baker's
Bakwin-Krida syndrome (metaphyseal dysplasia) Code Q78.5 Balancing side interference Code M26.56 due to Haemophilus ducreyi
A57 gonococcal (acute) (chronic)
A54.23 Balanoposthitis Sub-entries N47.6 gonococcal (acute) (chronic)
A54.23 ulcerative (specific)
A63.8 Balanorrhagia Cross-ref See: Balanitis
Balantidiasis, balantidiosis Code A07.0 Baldness Sub-entries see also Alopecia
male-pattern see Alopecia, androgenic
Balloon disease Cross-ref See: Effect, adverse, high altitude
Balo's disease (concentric sclerosis) Code G37.5 Bamberger-Marie disease Cross-ref See: Osteoarthropathy, hypertrophic, specified type NEC
Bancroft's filariasis Code B74.0 adhesive see Adhesions, peritoneum
anomalous or congenital see also Anomaly, by site
heart (atrial) (ventricular)
Q24.8 Bandl's ring (contraction), complicating delivery Code O62.4 Bangkok hemorrhagic fever Code A91 Bang's disease (brucella abortus) Code A23.1 Bankruptcy (anxiety concerning) Code Z59.868 Bannister's disease Sub-entries T78.3 Non-billable Banti's disease or syndrome (with cirrhosis) (with portal hypertension) Code K76.6 Bar, median, prostate Cross-ref See: Enlargement, enlarged, prostate
Barcoo disease or rot Cross-ref See: Ulcer, skin
Barodontalgia Code T70.29 Non-billable Baron Münchausen syndrome Cross-ref See: Disorder, factitious
Barosinusitis Code T70.1 Non-billable Barotitis Code T70.0 Non-billable Barotrauma Sub-entries T70.29 Non-billable odontalgia
T70.29 Non-billable otitic
T70.0 Non-billable Barraquer (-Simons) disease or syndrome (progressive lipodystrophy) Code E88.11 Barré-Guillain disease or syndrome Code G61.0 Barré-Liéou syndrome (posterior cervical sympathetic) Code M53.0 disease see Barrett's, esophagus
Bársony (-Polgár) (-Teschendorf) syndrome (corkscrew esophagus) Code K22.4 Barth syndrome Code E78.71 Bartholinitis (suppurating) Sub-entries N75.8 gonococcal (acute) (chronic) (with abscess)
A54.1 Bartonellosis Sub-entries A44.9 Barton's fracture Code S52.56 Non-billable Bartter's syndrome Code E26.81 Basal Cross-ref See: condition Basan's (hidrotic) ectodermal dysplasia Code Q82.4 Baseball finger Cross-ref See: Dislocation, finger
Basedow's disease (exophthalmic goiter) Cross-ref See: Hyperthyroidism, with, goiter
Basic Cross-ref See: condition Basilar Cross-ref See: condition Bason's (hidrotic) ectodermal dysplasia Code Q82.4 Basopenia Cross-ref See: Agranulocytosis
Basophilism (cortico-adrenal) (Cushing's) (pituitary) Code E24.0 Bassen-Kornzweig disease or syndrome Code E78.6 Bateman's Sub-entries
Bathing cramp Code T75.1 Non-billable Batten (-Mayou) disease Sub-entries E75.4 Batten-Steinert syndrome Code G71.11 Battered Cross-ref See: Maltreatment Battey Mycobacterium infection Code A31.0 Battle exhaustion Code F43.0 Battledore placenta Code O43.19 Non-billable Baumgarten-Cruveilhier cirrhosis, disease or syndrome Code K74.69 Bauxite fibrosis (of lung) Code J63.1 Bayle's disease (general paresis) Code A52.17 Bazin's disease (primary) (tuberculous) Code A18.4 Beach ear Cross-ref See: Swimmer's, ear Beaded hair (congenital) Code Q84.1 Béal conjunctivitis or syndrome Code B30.2 Beard's disease (neurasthenia) Code F48.8 elbow see Bursitis, elbow
Beau's Sub-entries
disease or syndrome see Degeneration, myocardial
lines (transverse furrows on fingernails)
L60.4 Bechterev's syndrome Cross-ref See: Spondylitis, ankylosing
disease
idiopathic mural endomyocardial disease
I42.3 myotonia congenita, recessive form
G71.12 Beck's syndrome (anterior spinal artery occlusion) Code I65.8 Beckwith-Wiedemann syndrome Code Q87.3 Bed confinement status Code Z74.01 Bed sore Cross-ref See: Ulcer, pressure, by site
Bedbug bite (s) Cross-ref See: Bite(s), by site, superficial, insect
Bedclothes, asphyxiation or suffocation by Cross-ref See: Asphyxia, traumatic, due to, mechanical, trapped
Bednar's Sub-entries
tumor see Neoplasm, malignant, by site
Bed-sharing, infant Code Z72.823 Bedsore Cross-ref See: Ulcer, pressure, by site
Bedwetting Cross-ref See: Enuresis Bee sting (with allergic or anaphylactic shock) Code T63.44 Non-billable Beer drinker's heart (disease) Code I42.6 Begbie's disease (exophthalmic goiter) Cross-ref See: Hyperthyroidism, with, goiter
antisocial
disorder, disturbance see Disorder, conduct
Behçet's disease or syndrome Code M35.2 Behr's disease Cross-ref See: Degeneration, macula
Beigel's disease or morbus (white piedra) Code B36.2 Bekhterev's syndrome Cross-ref See: Spondylitis, ankylosing
Belching Cross-ref See: Eructation Bell's Sub-entries
Bence Jones albuminuria or proteinuria NEC Code R80.3 Bends Code T70.3 Non-billable Benedikt's paralysis or syndrome Code G46.3 Benign Sub-entries see also condition
prostatic hyperplasia see Hyperplasia, prostate
Bennett's fracture (displaced) Code S62.21 Non-billable Benson's disease Cross-ref See: Deposit, crystalline Bent Sub-entries
Bereavement (uncomplicated) Code Z63.4 Bergeron's disease (hysterical chorea) Code F44.4 Berger's disease Cross-ref See: Nephropathy, IgA Beriberi (dry) Sub-entries E51.11 involving circulatory system
E51.11 Berlin's disease or edema (traumatic) Code S05.8X Non-billable Berlock (berloque) dermatitis Code L56.2 Bernard-Horner syndrome Code G90.2 Bernard-Soulier disease or thrombopathia Code D69.1 Bernheim's syndrome Cross-ref See: Failure, heart, right
Berylliosis (lung) Code J63.2 Besnier-Boeck (-Schaumann) disease Cross-ref See: Sarcoidosis Besnier's Sub-entries
Best's disease Code H35.50 Betalipoproteinemia, broad or floating Code E78.2 Beta-mercaptolactate-cysteine disulfiduria Code E72.09 Betting and gambling Sub-entries Z72.6 pathological (compulsive)
F63.0 Bezoar Sub-entries T18.9 Non-billable intestine
T18.3 Non-billable stomach
T18.2 Non-billable Bezold's abscess Cross-ref See: Mastoiditis, acute
Bianchi's syndrome Code R48.8 Bicornate or bicornis uterus Sub-entries Q51.3 in pregnancy or childbirth
O34.00 causing obstructed labor
O65.5 Bicuspid aortic valve (at birth) (congenital) Sub-entries Q23.81 functional, with stenosis see Stenosis, aortic (valve)
Biedl-Bardet syndrome Code Q87.83 Bielschowsky (-Jansky) disease Code E75.4 Biermer's (pernicious) anemia or disease Code D51.0 Biett's disease Code L93.0 Biforis uterus (suprasimplex) Code Q51.3 Big spleen syndrome Code D73.1 Bigeminal pulse Code R00.8 Bilateral Cross-ref See: condition Bile Sub-entries
Bilharziasis Sub-entries see also Schistosomiasis Biliary Cross-ref See: condition Bilirubin metabolism disorder Sub-entries E80.7 Bilirubinemia, familial nonhemolytic Code E80.4 Bilocular stomach Code K31.2 Binswanger's disease Code I67.3 Biparta, bipartite Sub-entries
Bird Sub-entries
fancier's disease or lung
J67.2 complications in mother see Delivery, complicated
compression during NOS
P15.9 defect see Anomaly
immature (less than 37 completed weeks) see Preterm, newborn
Birt-Hogg-Dube syndrome Code Q87.89 Bisalbuminemia Code E88.09 Biskra's button Code B55.1 abdomen, abdominal
with penetration into peritoneal cavity
S31.659 Non-billable epigastric region
S31.152 Non-billable Biting, cheek or lip Code K13.1 Biventricular failure (heart) Code I50.82 Björck (-Thorson) syndrome (malignant carcinoid) Code E34.09 heel (foot)
S90.3 Non-billable Blackfan-Diamond anemia or syndrome (congenital hypoplastic anemia) Code D61.01 Bladder Cross-ref See: condition injury
abdomen or thorax see Injury, by site
ear (acoustic nerve trauma) see Injury, nerve, acoustic, specified type NEC
Blastoma Sub-entries see Neoplasm, malignant, by site
pulmonary see Neoplasm, lung, malignant
Brazilian see Paracoccidioidomycosis
European see Cryptococcosis
emphysematous (lung) (solitary)
J43.9 filtering (vitreous), after glaucoma surgery
Z98.83 inflamed (infected), postprocedural
H59.40 Blebitis, postprocedural Sub-entries H59.40 Bleeder (familial) (hereditary) Cross-ref See: Hemophilia
Bleeding Sub-entries see also Hemorrhage atonic, following delivery
O72.1 Blennorrhagia, blennorrhagic Cross-ref See: Gonorrhea
Blennorrhea (acute) (chronic) Sub-entries see also Gonorrhea
inclusion (neonatal) (newborn)
P39.1 lower genitourinary tract (gonococcal)
A54.00 neonatorum (gonococcal ophthalmia)
A54.31 Blepharelosis Cross-ref See: Entropion
Blepharoclonus Code H02.59 Blepharoconjunctivitis Sub-entries H10.50 Non-billable Blepharoptosis Sub-entries H02.40 Non-billable mechanical
H02.41 Non-billable neurogenic
H02.43 Non-billable Blepharopyorrhea, gonococcal Code A54.39 Blepharospasm Sub-entries G24.5 Blind Sub-entries see also Blindness bronchus (congenital)
Q32.4 sac, fallopian tube (congenital)
Q50.6 color see Deficiency, color vision
concussion
S05.8X Non-billable abdominal wall
S30.821 Non-billable alveolar process
S00.522 Non-billable antecubital space see Blister, elbow
Bloch-Sulzberger disease or syndrome Code Q82.3 arborization (heart)
I45.5 atrioventricular (incomplete) (partial)
I44.30 Blockage Cross-ref See: Obstruction
Blocq's disease Code F44.4 constituents, abnormal
R78.9 donor see Donor, blood
Blood-forming organs, disease Code D75.9 Bloodgood's disease Cross-ref See: Mastopathy, cystic
Bloom (-Machacek) (-Torre) syndrome Code Q82.8 Blount disease or osteochondrosis Code M92.51 Non-billable dome cyst (breast) see Cyst, breast
Blueness Cross-ref See: Cyanosis Blues, postpartal Sub-entries O90.6 Blurring, visual Code H53.8 Blushing (abnormal) (excessive) Code R23.2 BMI Cross-ref See: Body, mass index
Boarder, hospital NEC Sub-entries Z76.4 accompanying sick person
Z76.3 healthy infant or child
Z76.2 Bockhart's impetigo Code L01.02 Bodechtel-Guttman disease (subacute sclerosing panencephalitis) Code A81.1 Boder-Sedgwick syndrome (ataxia-telangiectasia) Code G11.3 Aschoff's see Myocarditis, rheumatic
asteroid, vitreous see Deposit, crystalline
cytoid (retina) see Occlusion, artery, retina
drusen (degenerative) (macula) (retinal) see also Degeneration, macula, drusen
Boeck's Sub-entries
disease or sarcoid see Sarcoidosis
Boerhaave's syndrome (spontaneous esophageal rupture) Code K22.3 Boggy Sub-entries
Boil Sub-entries see also Furuncle, by site Bold hives Cross-ref See: Urticaria Bombé, iris Cross-ref See: Membrane, pupillary
Bone Cross-ref See: condition Bonnevie-Ullrich syndrome Code Q87.19 See also: Turner's syndrome Bonnier's syndrome Term
Bonvale dam fever Code T73.3 Non-billable Bony block of joint Cross-ref See: Ankylosis
BOOP (bronchiolitis obliterans organized pneumonia) Code J84.89 osteopenia
M85.8 Non-billable pelvis, with obstruction during labor
O65.1 Bornholm disease Code B33.0 Boston exanthem Code A88.0 Botalli, ductus (patent) (persistent) Code Q25.0 Bothriocephalus latus infestation Code B70.0 Botulism (foodborne intoxication) Sub-entries A05.1 Bouchard's nodes (with arthropathy) Code M15.2 Bouffée délirante Code F23 Bouillaud's disease or syndrome (rheumatic heart disease) Code I01.9 Bourneville's disease Code Q85.1 Boutonniere deformity (finger) Cross-ref See: Deformity, finger, boutonniere Bouveret (-Hoffmann) syndrome (paroxysmal tachycardia) Code I47.9 Bovine heart Cross-ref See: Hypertrophy, cardiac
Bowel Cross-ref See: condition dermatosis (precancerous) see Neoplasm, skin, in situ
disease see Neoplasm, skin, in situ
epithelioma see Neoplasm, skin, in situ
type
femur see also Deformity, limb, specified type NEC, thigh
fibula see also Deformity, limb, specified type NEC, lower leg
Bowleg (s) (acquired) Sub-entries M21.16 Non-billable Boyd's dysentery Code A03.2 Brachial Cross-ref See: condition Brachycephaly, non-deformational Code Q75.022 Bradley's disease Code A08.19 Bradyarrhythmia, cardiac Code I49.8 Bradycardia (sinoatrial) (sinus) (vagal) Sub-entries R00.1 tachycardia syndrome
I49.5 Bradytachycardia Code I49.5 Brailsford's disease or osteochondrosis Cross-ref See: Osteochondrosis, juvenile, radius Brain Sub-entries see also condition
syndrome see Syndrome, brain
Branched-chain amino-acid disorder Code E71.2 Branchial Sub-entries see condition
cartilage, congenital
Q18.2 Branchiogenic remnant (in neck) Code Q18.0 Brandt's syndrome (acrodermatitis enteropathica) Code E83.2 Bravais-jacksonian epilepsy Cross-ref See: Epilepsy, localization-related, symptomatic, with simple partial seizures
Braxton Hicks contractions Cross-ref See: False, labor Brazilian leishmaniasis Code B55.2 Break, retina (without detachment) Sub-entries H33.30 Non-billable with retinal detachment see Detachment, retina
horseshoe tear
H33.31 Non-billable round hole
H33.32 Non-billable device, graft or implant
T85.618 Non-billable see also Complications, by site and type, mechanical arterial graft NEC see Complication, cardiovascular device, mechanical, vascular
breast (implant)
T85.41 Non-billable Breast Sub-entries see also condition Imaging Reporting and Data System (BI-RADS): A
R92.31 Non-billable Breath Sub-entries
labored see Hyperventilation
Breathlessness Code R06.81 Breda's disease Cross-ref See: Yaws causing obstructed labor
O64.1 Non-billable footling
O32.8 Non-billable causing obstructed labor
O64.8 Non-billable incomplete
O32.8 Non-billable Breisky's disease Code N90.4 Brennemann's syndrome Code I88.0 Brenner Sub-entries
borderline malignancy
D39.1 Non-billable malignant
C56 Non-billable proliferating
D39.1 Non-billable Bretonneau's disease or angina Code A36.0 Brickmakers' anemia Code B76.9 Bridge, myocardial Code Q24.5 Bright red blood per rectum (BRBPR) Code K62.5 Bright's disease Sub-entries see also Nephritis
arteriosclerotic see Hypertension, kidney
Brill (-Zinsser) disease (recrudescent typhus) Code A75.1 Brill-Symmers' disease Code C82.90 Brion-Kayser disease Cross-ref See: Fever, paratyphoid
Briquet's disorder or syndrome Code F45.0 Brissaud's Sub-entries
infantilism or dwarfism
E23.0 Brittle Sub-entries
Broad Sub-entries see also condition
ligament laceration syndrome
N83.8 Broad- or floating-betalipoproteinemia Code E78.2 Brock's syndrome (atelectasis due to enlarged lymph nodes) Code J98.19 Brocq-Duhring disease (dermatitis herpetiformis) Code L13.0 Brodie's abscess or disease Code M86.8X Non-billable arches see also Deformity, limb, flat foot
arm (meaning upper limb) see Fracture, arm
back see Fracture, vertebra
bone see Fracture
Bromhidrosis, bromidrosis Code L75.0 Bromidism, bromism Sub-entries G92.8 due to
correct substance properly administered see Table of Drugs and Chemicals, by drug, adverse effect
overdose or wrong substance given or taken see Table of Drugs and Chemicals, by drug, poisoning
Bromidrosiphobia Code F40.298 Bronchi, bronchial Cross-ref See: condition with
acute
lower respiratory infection
J47.0 Bronchiolectasis Cross-ref See: Bronchiectasis
with
bronchospasm or obstruction
J21.9 influenza, flu or grippe see Influenza, with, respiratory manifestations NEC
with
influenza, flu or grippe see Influenza, with, respiratory manifestations NEC
obstruction (airway) (lung)
J44.89 tracheitis (l5 years of age and above)
J40 Bronchoalveolitis Code J18.0 Bronchoaspergillosis Code B44.1 Bronchocele meaning goiter Code E04.0 Broncholithiasis Sub-entries J98.09 Bronchomalacia Sub-entries J98.09 Bronchomycosis NOS Sub-entries B49 Bronchopleuropneumonia Cross-ref See: Pneumonia, broncho
Bronchopneumonia Cross-ref See: Pneumonia, broncho
Bronchopneumonitis Cross-ref See: Pneumonia, broncho
Bronchopulmonary Cross-ref See: condition Bronchopulmonitis Cross-ref See: Pneumonia, broncho
Bronchorrhagia (see Hemoptysis) Term
Bronchorrhea Sub-entries J98.09 chronic (infective) (purulent)
J42 with
bronchiolitis, acute
J21.9 bronchitis, acute (conditions in J20) see Bronchitis, acute
due to external agent see condition, respiratory, acute, due to
Bronchospirochetosis Sub-entries A69.8 Bronchostenosis Code J98.09 Bronchus Cross-ref See: condition Bronze baby syndrome Code P83.88 Brooke's tumor Cross-ref See: Neoplasm, skin, benign
Brown enamel of teeth (hereditary) Code K00.5 Brown's sheath syndrome Code H50.61 Non-billable Brown-Séquard disease, paralysis or syndrome Code G83.81 Bruck-de Lange disease Code Q87.19 Bruck's disease Cross-ref See: Deformity, limb BRUE (brief resolved unexplained event) Code R68.13 Brugsch's syndrome Code Q82.8 Bruise (skin surface intact) Sub-entries see also Contusion with
open wound see Wound, open
internal organ see Injury, by site
Bruit (arterial) Sub-entries R09.89 Brush burn Cross-ref See: Abrasion, by site Bruton's X-linked agammaglobulinemia Code D80.0 Bruxism Sub-entries
Bubbly lung syndrome Code P27.0 blennorrhagic (gonococcal)
A54.89 due to Haemophilus ducreyi
A57 Bubonocele Cross-ref See: Hernia, inguinal
Buccal Cross-ref See: condition Buchanan's disease or osteochondrosis Code M91.0 Buchem's syndrome (hyperostosis corticalis) Code M85.2 Bucket-handle fracture or tear (semilunar cartilage) Cross-ref See: Tear, meniscus
Budd-Chiari syndrome (hepatic vein thrombosis) Code I82.0 Budgerigar fancier's disease or lung Code J67.2 Buds Sub-entries
Buerger's disease (thromboangiitis obliterans) Code I73.1 Bulbar Cross-ref See: condition Bulbus cordis (left ventricle) (persistent) Code Q21.8 Bulimia (nervosa) Sub-entries F50.2 Non-billable Bulky Sub-entries
Bulla (e) Sub-entries R23.8 lung (emphysematous) (solitary)
J43.9 Bullet wound Sub-entries see also Puncture
fracture - code as Fracture, by site
internal organ see Injury, by site
Bundle Sub-entries
branch block (complete) (false) (incomplete) see Block, bundle-branch
of His see condition
Bunion Sub-entries M21.61 Non-billable Bunionette Code M21.62 Non-billable Buphthalmia, buphthalmos (congenital) Code Q15.0 Bürger-Grütz disease or syndrome Code E78.3 Buried Sub-entries
Burke's syndrome Code K86.89 Burkholderia Sub-entries
pseudomallei see Melioidosis
cell leukemia
C91.0 Non-billable lymphoma (malignant)
C83.7 Non-billable small noncleaved, diffuse
C83.7 Non-billable abdomen, abdominal (muscle) (wall)
T21.02 Non-billable first degree
T21.12 Non-billable second degree
T21.22 Non-billable third degree
T21.32 Non-billable Burnett's syndrome Code E83.52 Burning Sub-entries
Burn-out (state) Code Z73.0 Burns' disease or osteochondrosis Cross-ref See: Osteochondrosis, juvenile, ulna Bursa Cross-ref See: condition Achilles see Tendinitis, Achilles
adhesive see Bursitis, specified NEC
ankle see Enthesopathy, ankle and tarsus
calcaneal see Enthesopathy, foot, specified type NEC
Burst stitches or sutures (complication of surgery) Sub-entries T81.31 Non-billable external operation wound
T81.31 Non-billable internal operation wound
T81.328 Non-billable see also Dehiscence, closure abdominal wall muscle or fascia
T81.321 Non-billable Buschke's Sub-entries
disease see Cryptococcosis by site
scleredema see Sclerosis, systemic
Busse-Buschke disease Cross-ref See: Cryptococcosis by site
Buttock Cross-ref See: condition Button Sub-entries
Buttonhole deformity (finger) Cross-ref See: Deformity, finger, boutonniere Bywaters' syndrome Code T79.5 Non-billable Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
