Dog Heartworm Treatment Cost Calculator
Estimate total heartworm treatment costs for your dog
Dog Size
Infection Severity
Location
📋 Quick Answer
Heartworm treatment in the US costs $400–$1,500 on average, depending on infection severity (Class 1–4), dog size, and location. Prevention costs just $60–$120/year — making prevention the most important investment you can make for your dog’s heart health.
How Much Does Heartworm Treatment Cost?
Heartworm treatment cost is one of the most common questions dog owners face after a positive heartworm diagnosis. The average cost in the US ranges from $400 to $1,500 for Class 1 and 2 cases. Severe Class 3–4 infections requiring hospitalisation or emergency surgery can exceed $2,000–$4,500. The standard AHS (American Heartworm Society) treatment protocol uses melarsomine (Immiticide/Diroban) injections combined with doxycycline and a preventive medication.
Heartworm Treatment Cost Breakdown
| Component | Typical Cost | Notes |
|---|---|---|
| Confirmatory testing | $35-$75 | Antigen + microfilaria test |
| Pre-treatment bloodwork | $80-$200 | CBC + chemistry + chest X-ray |
| Doxycycline (30 days) | $40-$100 | Kills Wolbachia bacteria in worms |
| Melarsomine injections (×3) | $200-$600 | Main heartworm-killing drug |
| Preventive medication | $25-$60 | Kills microfilaria |
| Follow-up antigen test | $35-$75 | At 6 months post-treatment |
Heartworm Treatment vs Prevention Cost
The financial case for prevention is overwhelming: year-round prevention costs $60–$120 per year. Over a 10-year dog life, that is $600–$1,200 total. One heartworm treatment costs 1–4 years of prevention. Beyond cost, treatment carries real medical risks, requires 8–12 weeks of strict cage rest, and can cause permanent heart and lung damage even when successful.
Frequently Asked Questions About Heartworm Treatment Cost
How much does heartworm treatment cost for a 50 lb dog?
For a medium dog (50 lbs) with a Class 2 infection at an average US vet clinic, expect to pay approximately $600–$900 total, including all injections, medications, and follow-up testing. In high-cost cities like New York or Los Angeles, this can reach $800–$1,200. Use the calculator above for your specific situation.
Can I treat my dog for heartworms at home?
No. Heartworm treatment requires prescription melarsomine (Immiticide) injections administered by a veterinarian in a controlled clinical setting. Improper treatment — including the popular but dangerous “slow kill” ivermectin method — allows continued heart and lung damage and does not reliably eliminate adult worms. Always use a licensed veterinarian following the AHS protocol.
How long does heartworm treatment take and what is the success rate?
The full AHS protocol takes 3–4 months. Success rates exceed 95% for Class 1–2 cases when the protocol is followed correctly (including exercise restriction). Class 3–4 cases have higher complication rates but are still treated successfully in most cases with intensive monitoring.
Does pet insurance cover heartworm treatment?
Most accident and illness pet insurance policies cover heartworm treatment if heartworm was not a pre-existing condition at enrollment. Wellness/preventive plans typically cover preventive medications. Always enroll while your dog is heartworm-negative and young for the best coverage.
Conclusion
Our dog heartworm treatment cost calculator estimates total treatment costs for your dog’s size and infection severity. For prevention, use our heartworm prevention calculator. For annual budgeting, see our dog annual cost calculator and pet insurance calculator.