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Cushing's Disease - vet costs and insurance

Cushing's Disease in Dogs: Symptoms, Treatment and Cost

  1. Facts & Vet costs
  2. The Real Cost
  3. Insurance Traps
  4. Common Questions
By Marcel Janik · Last updated Oct 14, 2026

Diagnosis: $500-$1,500. Lifelong Trilostane: $50-$200/month. Cushing's (hyperadrenocorticism) makes your dog produce too much cortisol. Signs include excessive drinking and urination, a pot-bellied appearance, and hair loss. Most common in older dogs but often blamed on aging. Treatment manages but doesn't cure it.

What Causes Cushing's Disease
Two types: pituitary-dependent (85%) - a benign tumor triggers excess cortisol from adrenal glands. Adrenal-dependent (15%) - tumor on the adrenal gland overproduces cortisol. Iatrogenic form occurs from long-term steroid medication. Most common in dogs over 8 years old.

Symptoms

What to Watch For
Excessive drinking and urination (most common). Increased appetite. Pot-bellied appearance. Hair loss and thin skin. Recurrent infections. Panting, muscle weakness, lethargy. Many owners dismiss these as normal aging. Symptoms develop gradually over months.

Diagnosis

$500-$1,500
Blood work ($100-$200) shows elevated liver enzymes and cholesterol. ACTH stimulation test ($200-$400) or low-dose dexamethasone suppression test ($200-$400) confirms excess cortisol. Abdominal ultrasound ($200-$400) evaluates adrenal glands for tumors. Average $500-$1,500.

Treatment

$50-$200/month + Monitoring
Trilostane (Vetoryl) is standard: $50-$200/month. Your dog needs ACTH tests at 10 days, 4 weeks, 12 weeks, then every 3-6 months ($200-$400 each). Adrenal tumor surgery: $2,000-$5,000 (risky but potentially curative for adrenal-dependent cases). Average $50-$200/month.

Total First-Year Cost

$2,000-$5,000
Diagnosis, medication, and frequent monitoring. Subsequent years: $1,500-$4,000/year.

Small Breeds

Higher Risk
Poodles, Dachshunds, Beagles, and Boxers are most commonly affected. Senior dogs of any breed are susceptible.

Managed

Not Cured
Pituitary Cushing's is managed with medication lifelong. Adrenal tumors may be surgically removed if benign.

Prevention
No prevention for naturally occurring Cushing's. Avoid long-term steroid use when possible to prevent iatrogenic form.
Cushing's Disease - vet costs and insurance

The Real Cost

$3,000typical first-year cost
Diagnosis $500-$1,500
Treatment $50-$200/month
Total First-Year Cost $2,000-$5,000
Red flags

Insurance Traps

Cushing's is expensive to diagnose, manage, and monitor. Insurance coverage is critical.

Cushing's Coverage Basics

Chronic condition
Most policies cover Cushing's as a standard illness - including diagnostics, Trilostane, and monitoring tests. Standard 14-day illness waiting period applies. Diagnosis and treatment are costly, so insurance saves you a lot.

The Slow Onset Problem

Pre-existing
Early signs (elevated liver enzymes, excessive thirst, skin issues) are often dismissed as aging. If noted in vet records before enrollment, an insurer could claim pre-existing status. It's essential that your records are clean before you enroll.

Cost vs Deductible

Chronic condition
At $2,000-$5,000 first year and $1,500-$4,000/year after, Cushing's is very expensive. Frequent ACTH tests ($200-$400 each) add up fast. Over the course of treatment, insurance reliably saves thousands.

Secondary Conditions

Exclusion
Cushing's causes secondary problems - diabetes, UTIs, skin and blood infections. Some insurers link secondary conditions to Cushing's diagnosis. If Cushing's is excluded, related conditions may also be denied.

Common Questions

Real answers about costs, treatment, and insurance coverage.

What are the signs of Cushing's disease in dogs?
Excessive drinking and urination (2-3x normal, including overnight). Increased appetite, pot-bellied appearance, bilateral hair loss, thin fragile skin, recurring infections, excessive panting. Many owners mistake these for normal aging.
How much does Cushing's disease treatment cost?
First year: $2,000-$5,000 - diagnostics ($500-$1,500), Trilostane ($50-$200/month), and 4-6 ACTH tests ($200-$400 each). Subsequent years: $1,500-$4,000 with medication and monitoring every 3-6 months. Adrenal surgery: $2,000-$5,000 if needed.
How is Cushing's disease diagnosed?
Blood work shows elevated ALP and cholesterol. ACTH stimulation or low-dose dexamethasone suppression confirms abnormal cortisol. Ultrasound evaluates adrenals - bilateral enlargement suggests pituitary-dependent; single enlarged gland suggests adrenal tumor. Total: $500-$1,500.
Can Cushing's disease be cured?
Pituitary-dependent (85%) can't be cured - it's managed with daily Trilostane for life. Adrenal-dependent (15%) may be cured by surgical tumor removal but carries risk. Iatrogenic Cushing's resolves when the steroids are tapered off. Managed dogs live well.
What is the life expectancy for a dog with Cushing's disease?
With treatment, pituitary-dependent dogs typically live 2-3 years post-diagnosis, often longer. Because most are 8+ at diagnosis, lifespan isn't dramatically shortened. Untreated, the complications keep getting worse and cut both quality and length of life.
What is Trilostane and what are the side effects?
Trilostane (Vetoryl) blocks cortisol production in adrenal glands - standard treatment for both types. Side effects: decreased appetite, vomiting, diarrhea, lethargy, weakness. Serious risk: Addisonian crisis (cortisol drops too low, causing collapse or death). Regular ACTH tests are essential.
What breeds are most prone to Cushing's disease?
Poodles (all sizes), Dachshunds, Beagles, Boxers, Boston Terriers, and Yorkies have the highest incidence. More common in small to medium breeds. Most affected dogs are over 8 years old. Any senior dog with excessive drinking and a pot belly should be tested.
Does pet insurance cover Cushing's disease?
Most policies cover Cushing's as a standard illness. At $2,000-$5,000 year one and $1,500-$4,000/year after, it's a big expense. Enroll before signs appear in vet records. Once diagnosed, it's pre-existing for any new policy.

I doubted realvetcost.com, as long as Alf was healthy.

Then came the shock. August 2026, I'm sitting on a bench outside a veterinary... read more

Then came the shock. August 2026, I'm sitting on a bench outside a veterinary clinic in Brno. After his first epileptic seizure. Alf, healthy until recently, has just been diagnosed with a tumor in his belly and one in his head. I look at my own realvetcost.com, and it's one of the three most common conditions in Boxers.

I don't want to see the prognosis, but it's clear. How did it end?

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Marcel Janik, founder of realvetcost.com, with his Boxer Alf

Sources

Research and data used to compile this profile.

  1. 1 Behrend EN, Kooistra HS, Nelson R, Reusch CE, Scott-Moncrieff JC. Diagnosis of spontaneous canine hyperadrenocorticism: 2012 ACVIM consensus statement (small animal). J Vet Intern Med. 2013;27(6):1292-304.
  2. 2 Feldman EC, Nelson RW. Canine and Feline Endocrinology and Reproduction. 3rd ed. Saunders, 2004. - Chapter on Hyperadrenocorticism.
  3. 3 Galac S, Reusch CE, Kooistra HS, Rijnberk A. Adrenals. In: Rijnberk A, Kooistra HS, eds. Clinical Endocrinology of Dogs and Cats. 2nd ed. Schlütersche, 2010.