K73.1 — Chronic lobular hepatitis, not elsewhere classified
K73.1 is a billable, specific ICD-10-CM code for chronic lobular hepatitis, not elsewhere classified. It is valid for submission on a claim.
Excludes1 inherited from the categories above K73.1
These are not written on K73.1, but they bind it: a note on a category applies to every code beneath it. Billing K73.1 with anything listed here is a denial.
Other codes that can never be billed with K73.1
These codes carry an Excludes1 note pointing at K73.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading K73.1 alone.
Risk adjustment
K73.1 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 65 Chronic Hepatitis0.185 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
K73.1 is named in 4 Medicare coverage policies — 4 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A56669Billing and Coding: Hospice - Liver Disease
- A57063Billing and Coding: Diagnostic and Therapeutic Esophagogastroduodenoscopy
- A57361Billing and Coding: Monitored Anesthesia Care
How K73.1 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to K73.1.
- Hepatitis›chronic›lobular NEC
Code history
K73.1 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.
Related codes at this level
Codes that share K73. If K73.1 is not quite right, the correct code is usually one of these.
Questions about K73.1
- Is K73.1 a billable ICD-10-CM code?
- Yes. K73.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does K73.1 sit in the tabular list?
- Diseases of the digestive system (K00-K95), in the block Diseases of liver (K70-K77).
- What cannot be coded together with K73.1?
- K73.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above K73.1 (K73) and apply to it just the same.