ICD-10 Code K70.10: Alcoholic Hepatitis Without Ascites – Complete Coding & Billing Guide

ICD-10-CM code K70.10 designates a diagnosis of alcoholic hepatitis without ascites — liver inflammation caused by excessive alcohol consumption, confirmed in the absence of abdominal fluid accumulation. This is a billable, valid code applicable to adult patients ages 15–124 and is effective for HIPAA-covered transactions through the current fiscal year per CMS ICD-10-CM guidelines. For coders and billers, the critical distinction embedded in this code is not just the hepatitis itself — it is the documented absence of ascites, which directly determines whether K70.10 or its sibling K70.11 applies.

What Does ICD-10 Code K70.10 Mean?

K70.10 is the fifth-character-specific code within the K70.1 (Alcoholic hepatitis) subcategory, capturing acute or chronic hepatic inflammation attributable to alcohol use without fluid accumulation in the peritoneal cavity. The parent category K70 covers all alcoholic liver disease, and the K70.1x codes require a fifth character to reflect ascites status.

Key attributes of this code at a glance:

• Valid and billable for FY2026 with no description changes since its introduction in FY2016
• Adult-only diagnosis: applicable to patients aged 15–124 years; MCE will flag use outside this range
• Requires fifth-character specificity: K70.1 alone is not billable — K70.10 or K70.11 must be selected
• Use additional code instruction applies: F10.- codes for alcohol use/dependence must be reported when documented
• Classified under ICD-10-CM Chapter 11 (Diseases of the Digestive System), category K70–K77 (Diseases of Liver)

What Conditions and Diagnoses Does K70.10 Cover?

K70.10 captures alcoholic hepatitis presentations where the clinical record confirms liver inflammation linked to alcohol but does not document ascites. This includes both acute exacerbations and chronic, ongoing inflammatory states caused by heavy alcohol use.

Clinical presentations appropriately coded to K70.10 include:

• Acute alcoholic hepatitis with jaundice, elevated liver enzymes (AST, ALT), and hepatomegaly — no peritoneal fluid on imaging or exam
• Chronic alcoholic hepatitis identified incidentally during workup for alcohol use disorder, without concurrent ascites
• Alcoholic steatohepatitis (ASH) when hepatitis is the predominant documented finding and ascites is ruled out
• Hospital encounters for alcohol-related liver flares where physical exam and ultrasound are negative for fluid accumulation

What Does K70.10 Specifically Exclude?

The following diagnoses are coded separately and should not be reported with K70.10:

• K70.11 — Alcoholic hepatitis with ascites (use when peritoneal fluid is confirmed clinically or on imaging)
• K70.30 / K70.31 — Alcoholic cirrhosis of liver without/with ascites (distinct structural diagnosis requiring separate documentation)
• K70.40 / K70.41 — Alcoholic hepatic failure without/with coma (when liver failure is the primary finding)
• K71.xx — Toxic liver disease (use when hepatitis is drug- or chemical-induced, not alcohol-related)
• B15–B19 — Viral hepatitis codes (always exclude prior to assigning K70.10; viral etiology must be ruled out in documentation)

When Is K70.10 the Right Code to Use?

Selecting K70.10 requires the provider to have established both the alcoholic etiology of hepatitis and the confirmed absence of ascites. Coders should work through the following selection criteria in sequence:

1. Confirm the diagnosis is hepatitis, not cirrhosis or fatty liver alone. The provider must document inflammatory liver disease — not simply steatosis (K70.0) or fibrosis/sclerosis (K70.2).
2. Verify alcohol as the documented cause. The provider must attribute the hepatitis to alcohol use. Unspecified hepatitis without alcoholic etiology would route to K75.9 or a viral hepatitis code.
3. Confirm ascites status is documented. Look for physician documentation of ascites presence or absence — either a clinical statement, physical exam findings (shifting dullness, fluid wave), or imaging results (ultrasound, CT).
4. Select K70.10 only when ascites is documented as absent or not present. If ascites documentation is ambiguous or absent from the record, query the provider before defaulting to K70.10. Guessing this fifth character is a common audit trigger.
5. Apply the “use additional code” instruction. Assign the appropriate F10.- code (alcohol use, abuse, or dependence) if the provider has documented it.

How Does K70.10 Differ From K70.11?

The sole clinical distinction between these two codes is the presence or absence of ascites. This table clarifies the selection criteria side by side:

In practice, coders frequently encounter records where an ultrasound report mentions “no free fluid” in the impression but the provider’s note does not explicitly state “no ascites.” This is sufficient supporting documentation for K70.10 — the imaging result independently supports the fifth-character selection.

What Documentation Is Required to Support K70.10?

K70.10 requires a combination of provider statements, clinical findings, and — in most cases — diagnostic test results. Incomplete documentation is the primary reason claims with this code are flagged during coding audit preparation or returned for query.

What Must the Provider Document in the Clinical Notes?

1. Explicit diagnosis of alcoholic hepatitis — not merely “elevated liver enzymes” or “liver disease, NOS”
2. Attribution to alcohol — a direct statement linking the hepatitis to alcohol use (e.g., “alcoholic hepatitis secondary to chronic alcohol abuse”)
3. Ascites assessment — a documented physical exam finding (negative fluid wave, no shifting dullness) or a statement such as “no ascites noted”
4. Alcohol use history — pattern and duration of alcohol consumption; also needed to select the correct F10.- code
5. Exclusion of viral etiology — documentation that viral hepatitis panels were reviewed and negative, or that viral causes were ruled out clinically

Which Diagnostic or Lab Results Support This Code?

Supporting test findings that strengthen K70.10 code selection include:

• Liver function tests (LFTs): Elevated AST:ALT ratio > 2:1 is a characteristic marker of alcoholic hepatitis (as opposed to viral or autoimmune causes where ALT > AST is more typical)
• Complete blood count (CBC): Leukocytosis and anemia consistent with alcohol-related inflammation
• Abdominal ultrasound or CT: Imaging that confirms hepatomegaly, increased echogenicity, or inflammatory changes without free peritoneal fluid
• Serum bilirubin and prothrombin time: Elevated in moderate-to-severe presentations; useful for severity documentation
• Liver biopsy (when performed): Definitive histological confirmation showing hepatocyte ballooning, neutrophilic infiltration, and Mallory-Denk bodies — a significant specificity enhancer for diagnosis code specificity

What Is the Documentation Standard for Inpatient vs. Outpatient Settings?

How Does K70.10 Affect Medical Billing and Claims?

K70.10 groups into MS-DRG 432–434 (Cirrhosis and Alcoholic Hepatitis) depending on whether a major complication or comorbidity (MCC) or complication/comorbidity (CC) is present. The absence of ascites typically positions K70.10 as a lower-acuity code within the K70.1 subcategory, meaning accurate fifth-character selection has direct revenue cycle compliance implications.

Key billing and payer considerations:

• Medical necessity documentation is critical — payers, including Medicare, require evidence that the admission or encounter level was justified by the severity of hepatitis
• F10.- pairing is expected — claims submitted with K70.10 absent an alcohol use/dependence code may be flagged by payers for incomplete coding
• Adult-age restriction enforced at claim level — MCE edits will reject K70.10 if the patient is under age 15
• ICD-9-CM crosswalk: The approximate predecessor is ICD-9-CM 571.1 (Acute alcoholic hepatitis); note the “approximate” flag — the ICD-10 code carries greater specificity

What CPT or Procedure Codes Are Commonly Billed With K70.10?

Are There Any Prior Authorization or Coverage Restrictions?

• Medicare does not have a specific NCD for alcoholic hepatitis, but medical necessity must be documented per applicable LCD policies for inpatient admission
• Liver biopsy (CPT 47000) may require prior authorization under commercial plans; document clinical justification explicitly
• Substance use disorder treatment (F10.-) linked to K70.10 may trigger separate benefit coordination under behavioral health carve-out plans
• Observation vs. inpatient status is a frequent compliance issue — document the severity of hepatitis and inability to manage as outpatient to support inpatient admission criteria

What Coding Errors Should You Avoid With K70.10?

The K70.1x subcategory looks simple but generates disproportionate audit findings because of documentation-driven coding decisions. The following errors are ranked by frequency in claims review:

1. Using K70.1 (non-specific) instead of K70.10 or K70.11. K70.1 is a non-billable header code — submitting it will result in claim rejection. Always assign the fifth-character-specific code.
2. Defaulting to K70.10 when ascites status is undocumented. If the provider never assessed or documented ascites, coders must query rather than assume absence. This is the single most common audit finding for this code cluster.
3. Failing to code the concurrent F10.- alcohol use/dependence code. ICD-10-CM includes a “use additional code” instruction for alcohol use. Missing this code is both a clinical documentation failure and a coding error.
4. Assigning K70.10 when the primary diagnosis is actually cirrhosis. Alcoholic cirrhosis (K70.3x) and alcoholic hepatitis (K70.1x) are distinct diagnoses. If cirrhosis is documented with concurrent hepatitis, sequencing and dual-coding rules apply.
5. Confusing K70.10 with K75.0 (Abscess of liver) or K75.9 (Inflammatory liver disease, unspecified) when alcoholic etiology is not clearly documented.

What Do Auditors Look for When Reviewing Claims With K70.10?

Auditors conducting coding audit preparation for K70.10 claims focus on these red flags:

• Missing or vague ascites documentation — especially in records where ascites could clinically be expected
• No F10.- code on the claim when alcohol use is acknowledged anywhere in the chart
• Claims where K70.10 appears as a principal diagnosis but the record better supports K70.11 (undercoding ascites severity)
• Absence of imaging or physical exam documentation to confirm the fifth-character selection
• Use of K70.10 on pediatric patient records (MCE age edit violation)

How Does K70.10 Relate to Other ICD-10 Codes?

Understanding K70.10 in context of the full K70 category — and adjacent hepatic codes — is essential for accurate medical billing documentation requirements and sequencing compliance.

What Is the Correct Code Sequencing When K70.10 Appears With Other Diagnoses?

Per ICD-10-CM Official Coding Guidelines Section I.C.11 and the Tabular List instructions:

1. K70.10 as principal diagnosis: Sequence K70.10 first when alcoholic hepatitis is the reason for the encounter.
2. F10.- as secondary code: Follow K70.10 with the appropriate alcohol use code (e.g., F10.10 for alcohol abuse uncomplicated, F10.20 for alcohol dependence uncomplicated).
3. When K70.10 accompanies cirrhosis (K70.3x): Sequence the cirrhosis code first if it is the primary reason for the encounter; add K70.10 as an additional diagnosis if concurrent hepatitis is documented and clinically significant.
4. When K70.10 accompanies portal hypertension (K76.6): Both may be coded; sequence the condition chiefly responsible for the encounter first.
5. Hepatic encephalopathy (K72.x): If encephalopathy is present, it is coded separately and may take sequencing priority over K70.10 depending on the reason for admission.

Real-World Coding Scenario — How K70.10 Is Applied in Practice

Patient encounter: A 47-year-old male presents to the ED with jaundice, right upper quadrant pain, and fatigue. He reports drinking approximately 12 beers daily for the past 15 years. Labs reveal AST 310 U/L, ALT 140 U/L (AST:ALT ratio > 2:1), total bilirubin 4.8 mg/dL, and mildly elevated PT/INR. Abdominal ultrasound shows hepatomegaly with increased echogenicity and no free peritoneal fluid. The attending documents “acute alcoholic hepatitis, no ascites. Patient has alcohol dependence, chronic.” He is admitted for IV fluids, nutrition support, and alcohol withdrawal monitoring.

Correct Code Application

• K70.10 — Alcoholic hepatitis without ascites (principal diagnosis — reason for admission)
• F10.20 — Alcohol dependence, uncomplicated (use additional code per tabular instruction; matches provider documentation of “alcohol dependence, chronic”)
• F10.239 — Alcohol dependence with withdrawal, unspecified (if withdrawal symptoms are documented during the encounter as clinically significant)

Common Mistake in This Scenario

• Incorrect assignment: K70.11 — Some coders default to the “with ascites” code when they see an abdominal ultrasound ordered, assuming the imaging must have found something. The ultrasound explicitly documented no free peritoneal fluid — K70.11 would be a miscoding.
• Omitting F10.20 — Submitting K70.10 alone fails to reflect the full clinical picture and violates the “use additional code” instruction, creating downstream compliance exposure.

Frequently Asked Questions About ICD-10 Code K70.10

Is ICD-10 Code K70.10 Valid for Use in 2026?

K70.10 is a valid, billable ICD-10-CM diagnosis code for fiscal year 2026 with no changes to its description, validity status, or age restrictions since its introduction in FY2016. Coders should confirm annually against the ICD-10-CM Official Coding Guidelines published by CMS each October to catch any future updates.

What Is the Difference Between K70.10 and K70.11?

K70.10 is used when alcoholic hepatitis is confirmed and ascites has been documented as absent. K70.11 applies when the same diagnosis is accompanied by confirmed peritoneal fluid accumulation. The distinction requires explicit documentation — either a clinical statement or supporting imaging — and cannot be inferred from the presence or absence of symptoms alone.

Do I Always Need to Add an F10.- Code With K70.10?

Yes, when alcohol use, abuse, or dependence is documented by the provider, ICD-10-CM includes a “use additional code” instruction requiring the appropriate F10.- code. Omitting it is both a coding error and a documentation gap that auditors routinely flag during claims review.

Can K70.10 Be Used for Outpatient Encounters?

K70.10 may be assigned in outpatient settings when the provider has documented a confirmed diagnosis of alcoholic hepatitis without ascites. Under outpatient coding guidelines, coders should not assign this code based on a “rule-out” or “probable” diagnosis — the provider must have confirmed the diagnosis at the time of the encounter.

What Happens If the Provider Does Not Document Ascites Status?

If the clinical record does not address ascites — neither confirming nor ruling it out — the coder should initiate a provider query before assigning K70.10. Defaulting to the “without ascites” option when ascites status is truly unknown constitutes an unsupported code selection and creates audit risk under revenue cycle compliance standards.

How Does K70.10 Affect MS-DRG Assignment?

K70.10 groups into MS-DRG 432 (Cirrhosis and Alcoholic Hepatitis with MCC), 433 (with CC), or 434 (without CC or MCC) depending on comorbidities and complications present. Accurate coding of all documented conditions — including the F10.- code and any concurrent complications — directly affects the DRG weight and reimbursement level.

Key Takeaways

Every coder working with K70.10 should retain these core points:

• K70.10 requires fifth-character specificity — K70.1 is not billable; always select K70.10 or K70.11
• The fifth character is documentation-driven — ascites status must be confirmed in the clinical record, not assumed
• Always pair with an F10.- code when alcohol use, abuse, or dependence is documented anywhere in the encounter
• AST:ALT ratio > 2:1 in the labs is a supporting marker for alcoholic (versus viral) etiology — useful context during code review
• Imaging documentation counts — a negative ultrasound report is sufficient to support K70.10 even if the provider note is silent on ascites
• Audit risk is highest when ascites documentation is absent — build a query habit before coding the fifth character
• For deeper guidance on alcohol-related coding, consult the AHA Coding Clinic and the CMS ICD-10-CM tabular and guidelines published annually at cms.gov