ICD-10 Code for Calculus

The ICD-10-CM 2027 alphabetic index lists calculus, calculi, calculous with the subterms below. More specific codes depend on the details documented, as listed in the official index (68 codes, 68 billable).

Index entries for Calculus

ampulla of Vater – see Calculus, bile duct
anuria (impacted) (recurrent) – N20.9 – see also Calculus, urinary
appendix – K38.1
bile duct (common) (hepatic) – K80.50
- with
  - calculus of gallbladder – see Calculus, gallbladder and bile duct
  - cholangitis – K80.30
    - with
      - cholecystitis – see Calculus, bile duct, with cholecystitis
      - obstruction – K80.31
    - acute – K80.32
      - with
        chronic cholangitis – K80.36
        with obstruction – K80.37
        obstruction – K80.33
    - chronic – K80.34
      - with
        acute cholangitis – K80.36
        with obstruction – K80.37
        obstruction – K80.35
  - cholecystitis (with cholangitis) – K80.40
    - with obstruction – K80.41
    - acute – K80.42
      - with
        chronic cholecystitis – K80.46
        with obstruction – K80.47
        obstruction – K80.43
    - chronic – K80.44
      - with
        acute cholecystitis – K80.46
        with obstruction – K80.47
        obstruction – K80.45
  - obstruction – K80.51
biliary – see also Calculus, gallbladder
- with bile duct involvement – see also Calculus, bile duct
- specified NEC – K80.80
  - with obstruction – K80.81
bilirubin, multiple – see Calculus, gallbladder
bladder (encysted) (impacted) (urinary) (diverticulum) – N21.0
bronchus – J98.09
calyx (kidney) (renal) – see Calculus, kidney
cholesterol (pure) (solitary) – see Calculus, gallbladder
common duct (bile) – see Calculus, bile duct
conjunctiva – see Concretion, conjunctiva
cystic – N21.0
- duct – see Calculus, gallbladder
dental (subgingival) (supragingival) – K03.6
diverticulum
- bladder – N21.0
- kidney – N20.0
epididymis – N50.89
gallbladder – K80.20
- with
  - bile duct calculus – see Calculus, gallbladder and bile duct
  - cholecystitis – K80.10
    - with obstruction – K80.11
    - acute – K80.00
      - with
        chronic cholecystitis – K80.12
        with obstruction – K80.13
        obstruction – K80.01
    - chronic – K80.10
      - with
        acute cholecystitis – K80.12
        with obstruction – K80.13
        obstruction – K80.11
    - specified NEC – K80.18
      - with obstruction – K80.19
  - obstruction – K80.21
gallbladder and bile duct – K80.70
- with
  - cholecystitis – K80.60
    - with obstruction – K80.61
    - acute – K80.62
      - with
        chronic cholecystitis – K80.66
        with obstruction – K80.67
        obstruction – K80.63
    - chronic – K80.64
      - with
        acute cholecystitis – K80.66
        with obstruction – K80.67
        obstruction – K80.65
  - obstruction – K80.71
hepatic (duct) – see Calculus, bile duct
hepatobiliary – K80.80
- with obstruction – K80.81
ileal conduit – N21.8
intestinal (impaction) (obstruction) – K56.49
kidney (impacted) (multiple) (pelvis) (recurrent) (staghorn) – N20.0
- with calculus, ureter – N20.2
  - with hydronephrosis – N13.2
    - with infection – N13.6
- congenital – Q63.8
  - with hydronephrosis – N13.2
    - with infection – N13.6
lacrimal passages – see Dacryolith
liver (impacted) – see Calculus, bile duct
lung – J98.4
mammographic – R92.1
nephritic (impacted) (recurrent) – see Calculus, kidney
nose – J34.89
pancreas (duct) – K86.89
parotid duct or gland – K11.5
pelvis, encysted – see Calculus, kidney
prostate – N42.0
pulmonary – J98.4
pyelitis (impacted) (recurrent) – N20.0
- with hydronephrosis – N13.6
pyelonephritis (impacted) (recurrent)
- with hydronephrosis – N13.6
renal (impacted) (recurrent) – see Calculus, kidney
salivary (duct) (gland) – K11.5
seminal vesicle – N50.89
staghorn – see Calculus, kidney
Stensen's duct – K11.5
stomach – K31.89
sublingual duct or gland – K11.5
- congenital – Q38.4
submandibular duct, gland or region – K11.5
submaxillary duct, gland or region – K11.5
suburethral – N21.8
tonsil – J35.8
tooth, teeth (subgingival) (supragingival) – K03.6
tunica vaginalis – N50.89
ureter (impacted) (recurrent) – N20.1
- with calculus, kidney – N20.2
  - with hydronephrosis – N13.2
    - with infection – N13.6
- with hydronephrosis – N13.2
  - with infection – N13.6
ureteropelvic junction – N20.1
urethra (impacted) – N21.1
urinary (duct) (impacted) (passage) (tract) – N20.9
- with hydronephrosis – N13.2
  - with infection – N13.6
- in (due to)
- lower – N21.9
  - specified NEC – N21.8
vagina – N89.8
vesical (impacted) – N21.0
Wharton's duct – K11.5
xanthine – E79.82 – N22 [manifestation]

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.