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ICD10BillableValid for clinical use

ICD-10 Code K22.0: Achalasia of cardia

K22.0 is a billable ICD-10 diagnosis code used to classify Achalasia of cardia in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the digestive system (K00-K95).

Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the digestive system (K00-K95).

When is it used?

  • May be used when a clinician documents achalasia of cardia in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
11Diseases of the digestive system (K00-K95)
block
K20-K31Diseases of esophagus, stomach and duodenum
category
K22Other diseases of esophagus
currentK22

Official coding notes

Inclusion terms
  • Achalasia NOS
  • Cardiospasm
Excludes1 (do not code together)
  • congenital cardiospasm (Q39.5)

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

GastroenterologistGeneral Physician

Coverage-related procedures and services

CPT 95874high
NEEDLE ELECTROMYOGRAPHY FOR GUIDANCE IN CONJUNCTION WITH CHEMODENERVATION (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 95873high
ELECTRICAL STIMULATION FOR GUIDANCE IN CONJUNCTION WITH CHEMODENERVATION (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 43236high
ESOPHAGOGASTRODUODENOSCOPY, FLEXIBLE, TRANSORAL; WITH DIRECTED SUBMUCOSAL INJECTION(S), ANY SUBSTANCE
Source: CMS coverage guidance
CPT 43201high
ESOPHAGOSCOPY, FLEXIBLE, TRANSORAL; WITH DIRECTED SUBMUCOSAL INJECTION(S), ANY SUBSTANCE
Source: CMS coverage guidance
CPT 64650high
CHEMODENERVATION OF ECCRINE GLANDS; BOTH AXILLAE
Source: CMS coverage guidance
CPT 64653high
CHEMODENERVATION OF ECCRINE GLANDS; OTHER AREA(S) (EG, SCALP, FACE, NECK), PER DAY
Source: CMS coverage guidance

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
K22.0

Common synonyms

Achalasia of cardia

Frequently asked questions

Code details

CodeK22.0
SystemICD10
Display nameAchalasia of cardia
ChapterDiseases of the digestive system (K00-K95)
BlockDiseases of esophagus, stomach and duodenum

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Achalasia(cardia) (esophagus)Aperistalsis, esophagusCardiospasm(esophagus) (reflex) (stomach)DilatationIncompetency, incompetent, incompetenceMegaesophagus(functional)Megaloesophagus(functional)Spasm(s), spastic, spasticitySyndrome

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

ICD-10 Code K22.0 for Achalasia of cardia | HealthAssure