Is K23 a billable ICD-10-CM code?

Yes. K23 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does K23 sit in the tabular list?

Diseases of the digestive system (K00-K95), in the block Diseases of esophagus, stomach and duodenum (K20-K31).

What cannot be coded together with K23?

K23 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

K23

K23 — Disorders of esophagus in diseases classified elsewhere

Billable / specific codeICD-10-CM

K23 is a billable, specific ICD-10-CM code for disorders of esophagus in diseases classified elsewhere. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

late syphilis (A52.79)
megaesophagus due to Chagas' disease (B57.31)
tuberculosis (A18.83)

Code first

The underlying condition must be sequenced before this code.

underlying disease, such as:
congenital syphilis (A50.5)

Risk adjustment

K23 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

K23 is named in 1 Medicare coverage policy — 1 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy

Questions about K23

Is K23 a billable ICD-10-CM code?: Yes. K23 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does K23 sit in the tabular list?: Diseases of the digestive system (K00-K95), in the block Diseases of esophagus, stomach and duodenum (K20-K31).
What cannot be coded together with K23?: K23 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.