47 places offer this. 47 list prices; for the rest, call and ask before you go.
Heartworm test: $20 to $52 at the 31 places that publish a price, typically $30.
Lowest to highest, from each place's own price list. Packages and add-ons are left out. Prices change, so confirm when you call. Compare other cities.
Showing 10 of 47 places ·
Nonprofit clinic · 910 South Wayside Dr #100, Houston
Heartworm test $20
Low-cost shots, spay or neuter, and other preventive care Tuesday to Saturday, 10am to 6pm. Walk in or book online. Cat spay/neuter is $89, dog is $125. They don't treat sick or injured pets.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 8533 Gulf Fwy, Houston
Heartworm test $20
Low-cost shots, spay or neuter, and other preventive care Monday and Thursday through Saturday, 10am to 6pm. Walk in or book online. Cat spay/neuter is $89, dog is $125.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 13830 NW Fwy, Houston
Heartworm test $20
Low-cost shots, spay or neuter, and other preventive care inside the Northwest Freeway PetSmart, Wednesday through Saturday, 10am to 6pm. Walk in or book online.
Checked Nov 7, 2026 on the clinic's website
County shelter · 3100 W Fuqua St, Houston
Heartworm test $31
Walk in Monday to Saturday, 9am to 4pm, for shots. Exams and surgery need an appointment. A vet exam is $70 and an office visit is $35; vaccines and microchips are priced separately.
Checked Nov 7, 2026 on the clinic's website
County shelter · 612 Canino Rd, Houston
Heartworm test $20
Low-cost shots and basic care by appointment, Monday to Friday, 8am to 5pm. Anyone can come, not just Harris County residents. Cash or card only, no bills over $20.
Checked Nov 7, 2026 on the clinic's website
County shelter · 3200 Carr St, Houston
Heartworm test $20
The city shelter's low-cost preventive care clinic. Vaccines, microchips, and heartworm testing by appointment only; no walk-ins and no sick-pet or spay/neuter care here.
Checked Nov 7, 2026 on the clinic's website
County shelter · 900 Portway Drive, Houston
Heartworm test $30
Affordable shots and checkups Thursday to Sunday, 9am to 5:30pm. Book ahead or try the limited walk-in line. A wellness exam is $35; they treat some common illnesses but not injuries, and don't do spay/neuter.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 1001 Dairy Ashford Road, Houston
Heartworm test $40
Low-cost spay/neuter and wellness care 6 days a week. Scheduled wellness visits are $40, walk-in is $55. Anyone can use it; cash gets a 3% discount.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 19333 US Highway 59 North, #230, Humble
Heartworm test $40
Low-cost spay/neuter and wellness care 6 days a week. Scheduled wellness visits are $40, walk-in is $55. Anyone can use it; cash gets a 3% discount.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 28439 Tomball Parkway, Tomball
Heartworm test $40
Low-cost spay/neuter and wellness care 6 days a week. Scheduled wellness visits are $40, walk-in is $55. Anyone can use it; cash gets a 3% discount.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 586 Sawdust Road, Spring
Heartworm test $40
Low-cost spay/neuter and wellness care 6 days a week, near The Woodlands. Scheduled wellness visits are $40, walk-in is $55. Anyone can use it.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 3939 Allen Road, Pearland
Heartworm test $25.99
Low-cost wellness care for dogs and cats, Monday to Friday, 8am to 4pm. A vet visit is $50. Walk in Mondays at 8am for $75 urgent care, or book other visits online.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 2800 Antoine Dr, Houston
Vet visit free
A weekly low-cost shots clinic, Wednesdays 10am to 1pm, by appointment. Dog shots with a heartworm test are $65 and cat shots are $30, with no exam fee.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 4247 FM 1764 #400, Santa Fe
Heartworm test $30
Low-cost wellness care, dental, and spay/neuter in Santa Fe, weekdays 7am to 3pm, by appointment. A basic exam is $35; dental cleaning is $300. You don't have to live in Galveston County.
Checked Nov 7, 2026 on the clinic's website
Spay / neuter clinic · 1801 Durham Drive, Suite 1A, Houston
Cat spay/neuter from $95
Low-cost spay and neuter surgery for dogs and cats, Monday through Friday by appointment. A few walk-in spots open each morning for feral and community cats. Cat spay is $110, cat neuter $95; dog prices rise with weight up to $375.
Checked Nov 7, 2026 on the clinic's website
Spay / neuter clinic · 7234 Wynnwood Ln, Houston
Cat spay/neuter $90
Affordable spay and neuter surgery by appointment, open to the public and to rescue groups. Cat spay or neuter is $90; dog prices start at $125 and rise with weight. Call or text to book.
Checked Nov 7, 2026 on the clinic's website
Assistance program · The Woodlands
Heartworm test $20
Two subsidized spay/neuter plans for Grimes, Liberty, Montgomery, Polk, San Jacinto, Walker, and Waller county residents: $60 if you're on government assistance or earn under $40,000 a year, $85-$140 if you don't qualify for that. Apply online, then call a partner vet to book.
Checked Nov 7, 2026 on the program's website
Vaccine clinic · 2501 W Holcombe Blvd, Suite D, Houston
Heartworm test $25
Walk in any time for cheap shots and basic pet care, no appointment needed. Dog vaccine packages start at $25, cat packages at $35. Staff say it fills up fast, so go early.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 6220 W 43rd St, Houston
Microchip $35
Second Houston location of this walk-in vaccine clinic. No appointment needed. Dog packages start at $25, cat packages at $35. Go early, since it fills up fast.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 18420 A County Road 125, Pearland
Walk-in vaccine packages for puppies, kittens, dogs and cats, starting at $50. Heartworm prevention and microchips too. Pets must be at least 6 to 8 weeks old for shots.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 9500 Westview Dr, Suite 103-B, Houston
Walk-in vaccine and wellness clinic in northwest Houston, no appointment needed. Open Monday to Friday 10am-6pm and Saturday 9am-2pm.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · Mobile / rotating sites
Rabies shot $10
Weekend pop-up vaccine clinics that rotate around Houston, Baytown, Spring, Katy and more. No appointment; rabies shots as low as $10.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · Mobile / rotating sites
Rabies shot $10
Walk-in pop-up vaccine clinics rotating through Houston, Pasadena, League City, Pearland and Richmond. Rabies shots start at $10.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · Mobile / rotating sites
Rabies shot from $17
Mobile vaccine clinics that pop up around the Houston area, run by the same vet each time. Rabies shots from $17; basic exams $20.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · Mobile / rotating sites
Heartworm test $49
Vaccine pop-ups on set dates at PetSmart and other stores around Houston, mostly on weekends. Save a spot online or join the line. A 1-year rabies shot is $39, DA2PP $45.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · Mobile / rotating sites
Heartworm test $30
Drive-up vaccine clinics around Houston with no appointment and no exam fee. Rabies is $25, DHPP $35. Sundays 11am to 4pm at several sites, plus weekday evening stops.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 3412 25th Ave N, Texas City
Rabies shot $15
Walk-in low-cost vaccine clinics about once a month at the county shelter in Texas City, open to people from any city. Rabies was $15 when the county last posted prices. Dates are announced on the shelter's Facebook and Instagram.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 4431 FM 1960, Houston
Heartworm test $52
Book ahead for low-cost shots inside this Petco. Rabies is $39, and vaccine packages run $95-$269. A vet isn't always on site without a booked appointment.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 513 S Mason Rd, Katy
Heartworm test $52
Book ahead for low-cost shots inside this Katy Petco. Rabies is $39, and vaccine packages run $95-$269. A vet isn't always on site without a booked appointment.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 10864 Kuykendahl Rd, The Woodlands
Heartworm test $52
Book ahead for low-cost shots inside this Petco. Rabies is $39, and vaccine packages run $95-$269. A vet isn't always on site without a booked appointment.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 2650 Pearland Pkwy, Pearland
Heartworm test $52
Book ahead for low-cost shots inside this Petco. Rabies is $39, and vaccine packages run $95-$269. A vet isn't always on site without a booked appointment.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 2895 Gulf Fwy S, League City
Heartworm test $52
Book ahead for low-cost shots inside this Petco. Rabies is $39, and vaccine packages run $95-$269. A vet isn't always on site without a booked appointment.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 4700 Beechnut St, Houston
Rabies shot $40
Walk in for this vaccine pop-up inside the store, about once a month on a Sunday, 1pm to 2:30pm. Seen first come, first served. Rabies is around $40; package deals run $88-$150, plus small waste and lab fees.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 7041 Barker Cypress Rd, Cypress
Rabies shot $40
Walk in for this vaccine pop-up inside the store, about once a month on a Sunday. Rabies is around $40; package deals run $88-$150, plus small waste and lab fees.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 10800 Hwy 242, Conroe
Rabies shot $38
Walk in for this monthly vaccine pop-up inside Tractor Supply. Rabies is around $38; package deals run $84-$108, plus small waste and lab fees.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 8824 N SH146, Suite 150, Baytown
Rabies shot $38
Walk in for this weekly vaccine pop-up inside the store. Rabies is around $38; package deals run $84-$143, plus small waste and lab fees.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 4200 Pasadena Blvd, Pasadena
Rabies shot $40
Walk in for this monthly vaccine pop-up inside Tractor Supply. Rabies is around $40; package deals run $88-$150, plus small waste and lab fees.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 705 N Robert C Lanier Dr, Baytown
Heartworm test $25
Walk-in shot clinic at Baytown Animal Adoption Center in Baytown on some Saturdays, 9am to 11am. Shot packages for dogs and cats cost $50 to $90, with heartworm and flea and tick prevention too.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 2222 Spencer Highway, Pasadena
Heartworm test $25
Walk-in shot clinic at the Pasadena Indoor Flea Market parking lot in Pasadena on some Saturdays, 9am to 11am. Shot packages for dogs and cats cost $50 to $90, with heartworm and flea and tick prevention too.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 755 W Walker St, League City
Heartworm test $25
Walk-in shot clinic at League City Animal Care & Adoption Center in League City on some Saturdays, 2pm to 4pm. Shot packages for dogs and cats cost $50 to $90, with heartworm and flea and tick prevention too.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 4613 SH 3, Dickinson
Heartworm test $25
Walk-in shot clinic at Holy Trinity Episcopal Church Pavilion in Dickinson on some Saturdays, 2pm to 4pm. Shot packages for dogs and cats cost $50 to $90, with heartworm and flea and tick prevention too.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 1222 11th Street, Dickinson
Heartworm test $25
Walk-in shot clinic at the Sunset Lounge parking lot in San Leon on some Saturdays, 2pm to 4pm. Shot packages for dogs and cats cost $50 to $90, with heartworm and flea and tick prevention too.
Checked Nov 7, 2026 on the clinic's website
County shelter · 17555 Katy Fwy, Houston
Heartworm test $30
Shelter-run shot and wellness clinic on the Katy Freeway, Thursday to Saturday, 9am-4pm, by appointment. Rabies shot is $17, exam $30, dog annual package $79. No sick or injured pets.
Checked Nov 7, 2026 on the clinic's website
Vaccine clinic · 8818 Harlem Rd, Suite 100, Richmond
Walk-in low-cost shots and minor sick care in Richmond, no appointment needed. Open Monday to Friday 10am-6pm, Saturday 9am-2pm. Dog annual package with exam, heartworm test and core shots is $89.
Checked Nov 7, 2026 on the clinic's website
Low-cost private clinic · 11326 Westheimer Rd, Ste C, Houston
Heartworm test $34
Walk-in wellness clinic in west Houston for healthy pets. Exam $28, cat spay $80, cat neuter $70. Open Monday to Friday, 9am to 5pm. Sick or injured pets are not seen.
Checked Nov 7, 2026 on the clinic's website
Spay / neuter clinic · 4215 Gulf Freeway North, Dickinson
Heartworm test $40
Nonprofit spay and neuter clinic in Dickinson that also gives low-cost shots and checkups on weekdays. Cat neuter is $70, cat spay $105, rabies $15. Book online with a $20 deposit.
Checked Nov 7, 2026 on the clinic's website
Nonprofit clinic · 1014 Bayou Road, La Marque
Heartworm test $26
Nonprofit spay and neuter clinic in La Marque with low-cost shots and wellness visits on weekdays. Cat spay $95, cat neuter $75, rabies $17. Book ahead with a $20 deposit. No sick or injured pets.
Checked Nov 7, 2026 on the clinic's website
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