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Patient guide · Hepatology

Abnormal liver function tests, interpreting a mildly deranged LFT — the modern NICE-aligned pathway.

Mildly abnormal liver blood tests are common and often resolve with lifestyle change. Modern stratified workup: repeat and confirm, exclude alcohol and medications, non-invasive liver-fibrosis assessment, and hepatology referral for persistent significant derangement.

See indicative pricing
A radiographer guides a patient onto the bed of an advanced 3 Tesla MRI scanner in a London imaging suite

Key facts

  • 01

    Pattern-based interpretation

    A consultant hepatologist explains whether your derangement is hepatocellular, cholestatic or mixed — and what that actually means.

  • 02

    NICE-aligned stratified workup

    We follow the modern pathway: repeat and confirm, non-invasive liver screen, FIB-4 scoring, FibroScan if indicated.

  • 03

    Onward referral where it matters

    Persistent significant derangement or advanced fibrosis triggers a direct hepatology introduction — no wasted weeks.

  • Deranged ALT, AST, ALP, GGT, bilirubin or albumin outside the reference range

  • Very common — up to 20% of routine blood panels return with at least one abnormality

  • Distinguish hepatocellular (ALT/AST) versus cholestatic (ALP/GGT) pattern

  • Non-alcoholic fatty liver disease (NAFLD/MASLD) is the commonest cause

  • Use FIB-4 and NAFLD fibrosis score for non-invasive risk stratification

  • Refer for FibroScan or hepatology if persistent or advanced fibrosis suspected

Indicative pricing

What the abnormal-LFT pathway costs in London.

Indicative ranges for each step of the stratified workup. Send your recent result and we come back with firm figures for the steps you actually need.

In short

Repeat LFTs and a non-invasive liver screen: from £265, with a consultant pattern review in 3-5 days.

Test or step Indicative range
Repeat LFT panel (confirm derangement) £45–£90
Non-invasive liver screen (viral, autoimmune, iron, coeliac, α1-AT) £220–£420
Abdominal ultrasound (liver) £250–£450
FIB-4 + NAFLD fibrosis score calculation Included
FibroScan (transient elastography) £300–£600
Full pathway + hepatologist consult £600–£1,200

Prices vary by laboratory, how many markers are added to the non-invasive liver screen, and whether a hepatologist review or FibroScan is included. We come back with a firm quote within one working day.

The problem

An abnormal LFT is not a diagnosis.

Plenty of places will read out a red flag and refer straight to a scan. Understanding the pattern — hepatocellular versus cholestatic, transient versus persistent — is the part that matters, and it comes before any invasive test.

  • A single deranged result?

    We recommend the right repeat interval and the non-invasive liver screen that answers the question — not the biggest bundle.

  • A worrying pattern?

    We explain what hepatocellular versus cholestatic actually means, and whether imaging or FibroScan is the sensible next step.

  • Fatty liver on ultrasound?

    We combine LFTs with FIB-4 and, where useful, FibroScan to risk-stratify properly before considering biopsy.

Red flags

When to stop reading and pick up the phone.

Most abnormal LFTs are mild and can be worked up over days to weeks. The list below is different — it is a same-day GP, A&E or hepatology situation.

  • Jaundice with coagulopathy (acute liver failure)

  • Rising bilirubin with new confusion

  • New ascites

  • Encephalopathy

  • ALT or AST more than 10 × the upper limit of normal

  • Cholestasis with fever (suspected cholangitis)

  • Suspected liver mass on imaging

  • Alcohol withdrawal in known cirrhosis

  • Post-transplant graft dysfunction

The journey

From deranged result to explained plan — what happens, in order.

One consultant hepatologist from first message to explained results — usually within a few weeks, following the modern NICE-aligned pathway.

  1. 01

    Before

    Share your recent LFT result

    A short confidential form — your numbers, medications, alcohol intake, weight and any comorbidities.

  2. 02

    Before

    We recommend the repeat panel

    Within one working day: what to repeat at 4-6 weeks and which non-invasive liver screen markers to add.

  3. 03

    Before

    We book the confirmatory blood draw

    Clinic, home or office. We tell you how long to avoid alcohol and exercise for a clean result.

  4. 04

    On the day

    Blood draw and ultrasound

    A few minutes with an experienced phlebotomist, and an abdominal ultrasound if not already done.

  5. 05

    On the day

    Off to the lab

    Your sample goes to a UKAS-accredited laboratory the same day.

  6. 06

    After

    Pattern reviewed and FIB-4 calculated

    A consultant hepatologist reviews the pattern and calculates FIB-4 and NAFLD fibrosis score.

  7. 07

    After

    Next step arranged

    FibroScan, hepatology consult or lifestyle plan — whichever the pathway calls for.

Typical end-to-end: 4-8 weeks (to include the repeat interval). Urgent red flags: same day.

What the patterns show

Read the pattern, not the single number.

A deranged LFT is a shape, not a diagnosis. These are the shapes we see most, and what they usually mean.

  • Isolated raised ALT

    The commonest picture — usually NAFLD (MASLD) or drug-induced. Warrants repeat, lifestyle review and FIB-4 scoring.

  • Raised AST > ALT

    A classic alcohol pattern, particularly with a raised GGT and MCV. Honest disclosure changes the workup.

  • Raised ALP + GGT

    A cholestatic pattern — think bile-duct problem, drug reaction or infiltrative disease. Usually needs imaging.

  • Isolated raised bilirubin

    Often Gilbert’s syndrome — an entirely benign inherited variant seen in around 5% of adults.

  • Low albumin

    A marker of impaired synthetic function or chronic disease — always taken in context, never alone.

  • Raised INR

    Impaired synthetic function — a more concerning finding, particularly when paired with a low albumin.

  • Advanced fibrosis on FibroScan

    A liver stiffness above the threshold changes management — hepatology referral, surveillance and lifestyle intervention.

  • Red flag: jaundice + coagulopathy

    Yellow skin or eyes with a raised INR is a same-day A&E situation — acute liver failure until proven otherwise.

The stratified pathway

The modern NICE-aligned workup, step by step.

Each step earns its place — and the pathway stops as soon as the answer is clear.

  • Repeat LFTs at 4-6 weeks

    Confirm the derangement is real and persistent — a single abnormal panel is often transient.

  • Detailed history

    Alcohol units, all medications and supplements, weight trajectory, and metabolic comorbidities.

  • Non-invasive liver screen

    Hepatitis B and C serology, autoimmune markers, ferritin, coeliac screen and α1-antitrypsin.

  • Liver ultrasound

    First-line imaging — looks for fatty change, biliary dilatation, focal lesions and portal-vein flow.

  • FIB-4 score

    A simple calculation from age, ALT, AST and platelets — the modern gate for onward fibrosis assessment.

  • FibroScan (transient elastography)

    Non-invasive measurement of liver stiffness — the modern alternative to biopsy for fibrosis staging.

  • Hepatology referral

    For persistent significant derangement, advanced fibrosis, or any red flag on the pattern.

  • Liver biopsy

    Reserved for cases where non-invasive workup leaves the diagnosis or staging unclear.

Our vetted London network

A small panel of hepatologists and labs, we picked them.

Consultant hepatologists, UKAS-accredited labs and FibroScan providers across central London. Introductions are made privately, once we understand your case.

Selection criteria

How we choose every hepatologist and laboratory in our network.

A UKAS-accredited London laboratory processing liver function samples
UKAS-accredited laboratory

  • UKAS-accredited laboratories, with results reviewed by a consultant hepatologist

  • Consultant hepatologists available for same-week interpretation and onward planning

  • FibroScan available same-week across our partner clinics

  • Onward imaging or biopsy pathway arranged directly if a result needs it

Treatment and next steps

What actually happens after the workup.

For the majority the answer is lifestyle and follow-up. For a smaller group it is a specific diagnosis with a specific treatment.

  • Lifestyle modification

    Weight loss and alcohol reduction — the two interventions that shift the numbers most in MASLD and alcohol-related liver disease.

  • Stop or review medications

    Any hepatotoxic drug is reviewed with your prescriber — statins, methotrexate, herbal supplements, over-the-counter analgesics.

  • Manage metabolic risk

    Tight control of diabetes, lipids and blood pressure — the metabolic drivers of fatty liver disease.

  • Hepatitis vaccination

    Vaccination against hepatitis A and B if you are susceptible and have chronic liver disease.

  • Treat the identified cause

    Antivirals for hepatitis B or C, immunosuppression for autoimmune hepatitis, venesection for haemochromatosis.

  • Hepatology referral for FibroScan

    Non-invasive fibrosis staging where FIB-4 is indeterminate or high, or where fatty liver is confirmed.

  • Liver biopsy

    Reserved for cases where non-invasive workup leaves the diagnosis or staging unclear.

  • Multi-disciplinary team review

    For cirrhosis: surveillance ultrasound, endoscopy for varices, and structured follow-up with hepatology.

Preparation and practicalities

Getting the repeat right the first time.

Context changes the picture more than any single value. Alcohol, exercise, medications, weight and pregnancy all move the numbers.

  • Repeat before you react

    A single abnormal LFT is not a diagnosis — up to a fifth of routine panels come back deranged and many normalise on repeat.

  • Alcohol in the days before

    Alcohol in the 24-72 hours before a test raises GGT and AST. Give it a proper break before the repeat.

  • Medication review

    Statins, methotrexate, antifungals, herbal remedies and even paracetamol change the picture — a full list matters.

  • Weight and metabolic risk

    NAFLD (MASLD) is now the commonest cause of a mild ALT rise — diabetes, obesity and lipid status all feed into the risk score.

  • Hepatitis vaccination

    If you have chronic liver disease and are not immune to hepatitis A or B, vaccination is part of the plan.

  • FIB-4 is your friend

    A FIB-4 score under 1.3 is reassuring; over 2.67 warrants FibroScan and hepatology input.

  • ALT / AST over 10 × upper limit

    A very high transaminase level needs urgent workup — viral, drug-induced or ischaemic hepatitis until proven otherwise.

  • Jaundice changes everything

    New jaundice, dark urine or pale stools is not a private-clinic booking — go to your GP or A&E the same day.

  • Trend beats snapshot

    Always bring prior results — the direction of travel matters more than any single value.

Reading your report

A deranged panel can look intimidating. It isn’t.

However many markers are run, the interpretation follows the same four parts.

A UK consultant hepatologist reviewing an abnormal liver function test report

A quiet reminder

A single deranged value is not a diagnosis — trend and pattern are everything.

If you would like us to talk you through the pattern before your follow-up, just ask.

  1. 01 Header

    Indication, medications and alcohol

    Why the repeat was requested, the medications you take, and your alcohol intake — all of which change how the pattern is read.

  2. 02 Pattern

    Hepatocellular vs cholestatic

    ALT and AST dominance versus ALP and GGT dominance — the single most important call in interpreting a deranged LFT.

  3. 03 Scoring

    FIB-4 and NAFLD fibrosis score

    The non-invasive risk stratification numbers — low, indeterminate or high risk of advanced fibrosis.

  4. 04 Impression

    Read this first

    The likely cause, whether imaging or FibroScan is the sensible next step, and whether hepatology referral is warranted.

Recognised by major UK insurers

BupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealixBupaAXA HealthVitalityAvivaWPACignaHealix

Where investigation of an abnormal LFT is medically indicated we confirm cover with your insurer.

Frequently asked

Everything we get asked about abnormal LFTs.

Short answers on how common they are, when to worry, and how FIB-4 and FibroScan fit in.

  • How common are abnormal liver function tests?

    Very common — up to one in five routine blood panels comes back with at least one marker outside the reference range. Many are transient or reflect benign variants such as Gilbert’s syndrome.

  • Should I panic about a mildly raised ALT?

    No. A mildly deranged LFT rarely reflects serious liver disease. The modern pathway is to repeat at 4-6 weeks, exclude alcohol and medications, run a non-invasive liver screen and calculate FIB-4 before doing anything invasive.

  • What is the difference between a hepatocellular and cholestatic pattern?

    A hepatocellular pattern is dominated by raised ALT and AST — the enzymes released when liver cells are damaged. A cholestatic pattern is dominated by raised ALP and GGT and points to a bile-duct or infiltrative problem. The two need different workups.

  • What is FIB-4 and why does it matter?

    FIB-4 is a simple non-invasive score calculated from age, ALT, AST and platelet count. A FIB-4 under 1.3 makes advanced fibrosis unlikely; over 2.67 warrants FibroScan and hepatology input. It is the modern gate for deciding who needs further assessment.

  • When do I need a FibroScan?

    FibroScan is indicated when your FIB-4 is indeterminate or high, when you have known fatty liver disease or chronic viral hepatitis, or when there is any suspicion of advanced fibrosis. It is a non-invasive ultrasound-based measurement of liver stiffness.

  • When should I see a GP urgently rather than book privately?

    If you have jaundice (yellow skin or eyes), dark urine, pale stools, new confusion, easy bruising, ascites, or ALT/AST more than ten times the upper limit of normal — that is a same-day GP or A&E situation, not a private clinic booking.

Sources

Where this guide comes from.

Reviewed by Pulse Atlas Editorial Board, . Last reviewed 2026-07-30. Next review 2027-07-30.

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In practice, in London

What abnormal liver function tests looks like on the ground in London

With abnormal liver function tests, the London question is usually about report turnaround and the radiologist reading it — not whether the scan is available. The wait for abnormal liver function tests on the NHS depends heavily on where you live and how urgently the referral is graded. Central and West London private clinics can normally book within a week, with imaging or a procedure slot to follow shortly after. It’s worth being honest about the reason for going private: usually it’s time, not a fundamentally different test.

A private abnormal liver function tests pathway in London usually looks like this: an initial consultation, any diagnostics booked at a nearby facility (most within Zone 1 or 2), and a written report sent to you and your GP within a few days. The consultants we work with hold NHS posts alongside their private lists, which keeps the standards consistent across both settings. For abnormal liver function tests specifically, the difference between a routine report and a sub-speciality read is where private care earns its keep.

The value of going through a concierge for abnormal liver function tests isn’t access — anyone with an insurer or a credit card can get a private appointment in London. The value is knowing which consultant reads this particular presentation best, which unit turns reports around fastest, and which pathway won’t hit a dead end if the findings point somewhere unexpected.

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