Preiser Animal Hospital Urgent Care & Wellness Appointments would like to take this opportunity to welcome you, your family, and your special family member to our website. As you continue to browse and explore our website, it is our hope that you will learn more about our dedication to your family and the quality veterinary medicine and service we provide.

Our goal here at Preiser Animal Hospital Urgent Care & Wellness Appointments has always been to assemble a veterinary health care team committed to providing exceptional client service and veterinary health care. Preiser Animal Hospital Urgent Care & Wellness Appointments displays an unrivaled commitment to our clients through continuing education, technological advances in veterinary medicine and service, and most importantly, administering compassionate care to all pets entrusted to us.


Fear Free Certified Professionals

Some of our staff are Fear Free Certified! This means that our mission is to prevent and alleviate fear, anxiety, and stress in pets by inspiring and educating the people who care for them.

Rest assured that when you bring your pets to Preiser Animal Hospital Urgent Care & Wellness Appointments, we will ensure a Fear Free experience.


Preiser Animal Hospital Urgent Care & Wellness Appointments is a full-service animal center whose mission is to provide the highest standard of veterinary care for pets. We provide friendly, informative, and supportive services for you and your pet, while maintaining a superior working environment for our employees.


Dr. Kristine Preiser


Dr. Preiser's Bio

The daughter of veterinarian and hospital founder Dr. Herbert Preiser, Dr. Kristine Preiser has been the medical director of Preiser Animal Hospital Urgent Care & Wellness Appointments since 2007. Kristine played Division I soccer at Iowa State and at the University of Montana where she also earned a BS in Biology with an emphasis in Zoology and a minor in Philosophy. Kristine attended Ross University School of Veterinary Medicine and then completed her clinical year at Washington State University where she graduated in 2007. Before becoming a veterinarian, Kristine held a number of different jobs including wilderness firefighter in the Tally Lake Ranger District in Montana; soccer coach in IL, MT, & AK, including the Olympic Development Program and the Head Women’s Coach of the St. Kitt’s and Nevis National Team for over 3 years; worked as a team member on the wolf reintroduction program through the U.S. Fish & Wildlife Department in Grand Teton National Park for a winter season; spent 1 year teaching the ways of the wilderness with troubled youths in Montana to encourage a positive lifestyle (AYA), and she also was a substitute teacher and Youth Soccer coach in Alaska for 2 years.

In her free time, Kristine enjoys reading and painting, playing any sports and anything outdoors, especially soccer and golf, and backpacking, skiing, hiking, kayaking, and camping with her dogs Roux, Bug, and Zwieback, Phoebe, and also 3 cats Targa, Talisker (Tallie) and Keaton and squeaking with her guinea pig Nome. When at home, her hobbies include organic gardening, raising chickens, beekeeping, reading, and stamp collecting and scrapbooking for her daughter. In 2019 she and Brett had their first child Charlotte Elisabeth and they both can’t wait to teach her the wonders of nature and animals!! You may also meet her rescue cat Kenai when you come to the animal hospital. Giving back to the community is important to Dr. Preiser; she has recently started a therapy farm in Northern Illinois for both people and animals, pursuing her wildlife license to help any and all animals heal both physically and mentally. She volunteered as medical director of an on-campus animal shelter founded by her family from 2007 to 2018, taking pride in treating every shelter animal like her own and not just a number. Her veterinary interests include surgery, geriatric medicine, wildlife, orthopedics, exercise rehabilitation, holistic medicine, and reproduction. She is now the medical director for Border Tails Rescue and Adoptable Friends Inc, 2 shelters. She strongly supports their mission and philosophy.  She is now the medical director for Border Tails Rescue and Adoptable Friends Inc, two shelters she strongly supports their mission and philosophy. She is also a huge golf fan and loves the German premier soccer team Bayern Munich. She moved back to the Midwest to be closer to her father, but her heart and passion lie in the Northwestern mountains. Someday she’ll be reunited with the wilderness, she says! 🙂 

Dr. Preiser’s latest endeavor is to volunteer her skills in Alaska and be a volunteer vet each January for The Copper Basin dog sled race- known to be the toughest 300-mile race in North America. The athleticism and toughness of these little canine athletes are incredible she says!

Dr. Mary Lewis

Dr. Silvana Beloiu


Dr. Beloiu' Bio

Dr. Beloiu was born in the capital city of Romania, Bucharest. She decided to become a veterinarian from an early age because she always felt compassion
every time she encountered a sick pet. In her childhood, she spent three weeks every summer in the Carpathian mountains of Romania camping with her whole family, hiking, and picking herbal medicine, mushrooms, and wild berries with her grandfather. Her grandfather taught her a lot about the forest and opened her heart to nature.

She graduated from the University of Agricultural Sciences and Veterinary Medicine in Bucharest, Romania in 1997. During her study years, she volunteered almost every Saturday at the university clinic, helping with treatments, surgeries, and house calls. This experience in the formative years
constituted a great foundation for future clinical work as a veterinarian. After graduation, she worked in a small animal practice for 3 years in Bucharest. In
2000 she moved to the United States and started working as a veterinary assistant at Riser Animal Hospital and then at March Animal Hospital while
being enrolled in the Educational Commission for Foreign Veterinary Graduates (ECFVG) of the American Veterinary Medical Association (AVMA). She
completed the Evaluated Clinical Year (ECY) at Iowa State University, and finished the program in 2007, becoming a licensed veterinarian. Upon
completion of the program, she returned to March Animal Hospital where she practiced for 14 years all aspects of small animal veterinary medicine. Always
interested in gaining new skills she attended various training programs for laser surgery and also in Traditional Chinese Veterinary Medicine (TCVM) becoming certified in acupuncture, herbal, and food therapy. Blending Western and Eastern medicine has been her passion, trying to get the best outcome for the patient. Other professional interests include all types of soft tissue surgery, geriatric medicine, and dentistry. She also received training in laparoscopic surgery at the Animal Medical Center of Skokie.

In her free time, she loves spending time with her family, husband Alex, daughter Melissa, and cat Emma Fuzzball, reading, cooking, bicycle riding, rollerblading, and listening to music.

Dr. Mary Lewis

Dr. Jason Olech


Dr. Olech' Bio

Dr. Olech began working in the veterinary industry in 2003 as a veterinary kennel assistant, and after being promoted to a technician, he began entertaining thoughts of becoming a veterinarian like his mentors. During this time, Dr. Olech enrolled as an undergraduate student at Illinois State University, where he became a duly elected member of the Phi Sigma Biological Sciences Honor Society Beta Lambda Chapter on April 29th, 2005, before graduating from Illinois State University in 2006 with a major in biology and a minor in chemistry. After a very long and arduous application process, Dr. Olech began his veterinary studies abroad at St. Georges University, where he graduated in 2010 as a doctor of veterinary medicine.

After returning home, Dr. Olech began working as the on-site veterinarian for the Scott Smith All Animal Expo, which began in December of 2010, where he continued until December 2019. In January 2012, Dr. Olech and Gavin Brink, a herpetologist and colleague from ISU, co-founded Chicagoland Mobile Veterinary Services. A mobile veterinary hospital dedicated to providing care for disabled pets, geriatric pets, zoo animals, and exotic pets that could not be easily transported to the veterinary hospital. Unfortunately, after expanding into a fixed hospital location, after approximately 8-years in business, the decision was made to close Chicagoland Mobile Veterinary Services due to economic stress. Since that time, Dr. Olech has continued his work at other veterinary hospitals throughout the Chicagoland Region.

Dr. Olech has experience with Domestic Dogs, Domestic cats, birds, reptiles, amphibians, freshwater fish, saltwater fish, reef fauna, New World primates, small to medium size predatory cats, wolves, venomous reptiles, crocodilians, large constrictors, raptors, large parrots, marsupials, rodents, mustelids, lagomorphs, ovine, caprine, small bovine, cervids, and other rare exotic mammals. Despite his heavy focus in exotic animal medicine, Dr. Olech’s primary interests are internal medicine, cardiology, immune disorders, dermatology, deviant behavior & animal psychiatry. Dr. Olech’s favorite animal is, and always will be, the dog!

Dr. Olech enjoys several hobbies which include alternative gardening, amateur chemistry, ham radio (Amatuer Extra Class Operator – W1LCT), ELR rifle sports, tactical pistol sports, off-road ATV sports, camping, fishing, hunting, trapping, and bushcraft. None of this would be worth anything without his beautiful wife and two young Children. Together, they live happily with their dog Trigger, the last surviving member of their 6 animal pack. Dr. Olech is very excited to be at the Preiser Animal Hospital, and he looks forward to meeting you and your pets! Come in and meet him!

Dr. Mary Lewis

Dr. Mary Lewis


Dr. Lewis' Bio
Dr. Mary Lewis graduated from the University of Wisconsin-Madison in 1988 as the second graduating class. She also did her undergrad at U of W-Madison. She has been part of our team since 2020 and immediately fit in with our team. She is one of the kindest, most compassionate people you’ll ever met, not only to our patients, but to our clients and team! She is so thankful to be a part of pets and their peoples’ lives, with a particular interest in working for the best of preventative care from beginning to end of our pets lives. She grew up in Northern Wisconsin playing outside all day in the woods and on a lake. Her family had horses, dogs and cats. She cherishes that she and her family still get to head north all year round to Manitowish Waters to her childhood home. For Dr. Lewis, her faith and family are her core focuses.

She had three dogs for most of her adult life , one always being a lab. Now she has a single dog home of her Papillon, Wilbur. Her pet naming criteria sourced from 50-60’s sitcom characters ( aka Wilbur Post from Mr Ed) . Ask her about her pets’ names! Outside of veterinary medicine, she love s her hobbies with her husband ( they just celebrated their 34 th anniversary !!) , her 3 lovely kids with terrific spouses and dogs, and her pride and joy grandchildren . She’s pretty addicted to her almost 3 year old grandson and 5 month old granddaughter . She and her husband love walking, bicycling, kayaking, disc golf, her new found hobby of pickleball, fishing,cross country ski ng, snowshoe ing, cooking, gardening, reading (especially historical fiction). Her newest adventures with her husband is to visit the National Parks! When you meet Dr. Lewis you’ll feel like you’ve found a friend.



Technician Team Leader

Jaimie's Bio
Jaimie joined Preiser Animal Hospital Urgent Care & Wellness Appointments family back in February of 2005. She graduated in 2000 from Oregon State University with a degree in Wildlife Biology and that began the start of her career with animals. In 2001, she signed on with the U.S, Fish & Wildlife Service as a team member on the Greater Yellowstone Area Wolf Reintroduction project. After working there for 2 years, Jaimie took a position with the U.S. Forest Service doing flying squirrel surveys in Alaska. Eight years after leaving IL, Jaimie made the decision to move back home to be closer to her family. Outside of work she enjoys playing soccer and going to Blackhawks games, but she’s always up for anything outdoors. Living out west for 8 years has given her a greater appreciation of the beautiful things nature has to offer. Jaimie has 2 cats, Wrigley and Odie that are also Heartland Animal Shelter alumni and 2 dogs, McKinley and Chico. Did you know Jaimie is a carboholic??


Certified Veterinary Technician
Elsie's Bio
Since joining our team at Preiser Animal Hospital Urgent Care & Wellness Appointments in 2015 her mind and her heart have been opened to so many opportunities to make a difference in the lives of the families and their companions.

She attended Fox College Vet Tech Institute and is proud to be a Certified Vet Technician.

She enjoys living a very exciting life, always trying new food and going on adventures; but being a mom is her happiest journey yet, and her Son gives her an excuse to act silly! Lifting and running keeps her fit, but dancing is her favorite way to maintain good cardiovascular fitness!

Elsie’s Zoo features her funny Jack Russell Terrier Troy, her Pit Bull Petey, Alec the Bearded Dragon and Oscar the Leopard Gecko.

Elsie is blessed knowing she has a whole team of amazing people with the same passion and goals in their hearts as she does for the veterinary field. We are blessed to have Elsie on our team, come in and meet her and you will agree with us on how compassionate, caring, and will do anything to make your pet and you comfortable here at the hospital!!


Certified Veterinary Technician
Amy's Bio
Amy joined the team in October of 2016, she graduated from vet tech institute in 2011 and is a certified veterinary technician. She has been working with animals since she was in high school. Amy has worked with a variety of species including birds, rabbits, reptiles, and wildlife. Amy lives with her husband, 3 small children, a lab named Claire, and a bunny named Charley Anderson. Amy enjoys scrapbooking in her spare time.


Veterinary Technician

Jamie's Bio

Jamie has been working in veterinary hospitals since 2008. She has experience working in all aspects of animal hospitals, but her true passion lies with patient and client care. She continues to expand her knowledge in the veterinary field by being a member of many Veterinary Organizations. Her home life consists of paddleboarding (when the IL weather cooperates), indoor and outdoor gardening, painting, and camping with her Fiancé, Michael in their new camper! She has 3 fur babies at home; Utz (a polydactyl cat), Cliff (the Chonker cat), and Sammy (the “Old Man” Pit/Akita mix). Come meet Jamie and she is so eager to share her wealth of knowledge and compassion! 


Veterinary Assistant
Katie's Bio
Born into a family with Siberian Huskies and Thoroughbreds, her love of animals began early. It was always her dream to work with animals as well as humans, and in 2011, she graduated from the University of Illinois at Urbana-Champaign with a BS in pre-veterinary medicine. She spent the next 3 years studying chiropractic medicine at National University of Health Sciences. It was at this time when she lost the first of her 4 miniature dachshunds, Kali, and Kolby, Jessica, and Rascal, were soon to follow. It was in this moment that she dedicated her life to saving animals that could not save themselves. Outside of work, she spends all of her time at the stable, riding as many horses as she can. She has been riding and competitively showing jumping horses for 20 years. She has a 22-year-old Thoroughbred, Magic, and a Labrador Retriever puppy, Lola. She loves traveling, so much so that she was a student ambassador for the state of Illinois in 2006. She also loves attending Blackhawks games and Bears games, as well as attending concerts, and enjoying anything that allows her to spend time in the water. The first thing you’ll notice about Katie is her kindness and willingness to listen, come in and meet her!


Veterinary Assistant

Amanda's Bio
Amanda has been in the veterinary field for about seven years and has loved every minute of it. She’s always known it was what was meant for her to be doing. She’s currently working hard in her final semester to achieve her Certified Veterinary Technician degree. In her spare time, she likes to spend time with her furry zoo at home: Lady May, the pit bull mix; Ivanka, the Kitten; and Wednesday, the chinchilla. She loves spending time with her nephew Easton. Come in and meet Amanda; she might meet you in the parking lot in excitement to meet you and your pets! Her positive and vibrant energy is contagious!


Veterinary Assistant

Maribel's Bio

As a kid she always knew she wanted to help and save a pet’s life and make a difference. She started off working at pet boarding facilities and kept growing her knowledge till she got hired on as a veterinarian assistant. She inspired her siblings to be animal lovers as well. As a kid she would read books and watch animal channels to learn more about pets and their behavior. At the age of 11 she convinced her parents to get her a dog, a miniature poodle named Smokey. After that her family only got bigger! She am a current owner of a miniature poodle (Smokey), miniature yorkie (Mia), three domestic Shorthair cats (Batman, Cleo and Apa), a huskie (Maze) and lastly a Cane Corso (Beast). What a farm, you can tell she loves animals! That doesn’t include her sister two horses Odyssey and Ruby and her mother’s miniature poodle/yorkie (Grouch). She intends to continue to grow in the animal medical field and save one pet at a time. Maribel brings a gentle compassion and calm to her team and her patients.


Veterinary Assistant

Tori's Bio
Tori has worked in vet hospitals since she was 18 and has learned so much throughout the years. She has moved around a lot and her cat Zoey has been along for the ride everywhere she’s been! She now have the amazing opportunity of attending veterinary school and will graduate in 2027! Tori is so happy to have found Preiser Animal Hospital for my time off to continue learning.


Customer Service Representative Leader

Heather's Bio

Meet Heather! She is part of our client service representative. She loves working in the animal field because it’s always something different everyday. She has worked in the vet med field for 4 years now. She has a lab pointer mix at home named Lucky. In her spare time, she loves taking her on long walks with her fiancé on the weekends and exploring new places. Heather is very knowledgeable and compassionate and works hard to accommodate your every need.


Customer Service Representative

Stacy's Bio
Stacy really started her animal care career at O’hare with the PetSafe program for United Airlines caring for all types of exotic zoo animals, cats and dogs in between their layovers. From there, she found her way in the veterinary field. She has been both a CSR and tech since 2016! She owns 3 dogs (Elsa, Emma, and Forky). In hjer spare time, She loves to travel and spend time with her 2 kids, Erik and Leah.


Kennel Lead

Elizabeth's Bio
Meet Elizabeth, our Kennel Lead! She looks forward to meeting and spending time with your fur babies! She’s worked in the pet care industry for the last 10 years, and is a lifelong pet owner. Her favorite thing about working with pets is connecting with them and finding that thing that makes them unique. She truly hopes to find that thing with your pet and can either capture it in the report or a photo. She will treat your pet like they are her own.

She lives in Lake Bluff with her husband. She recently lost their beloved dog Ava. While they aren’t quite ready for a new adventure buddy just yet, she is hoping to get her dog fix with your pups! She currently has 2 kitties named StanLee and Loki. If you can’t tell by their names she is a Marvel fan! She was even able to meet the legend Stan Lee himself a few years ago.


Kennel Attendant Extraordinaire
Brad's Bio

If any of you use our boarding services, you know Brad! Brad has been loyal to Preiser Animal Hospital Urgent Care & Wellness Appointments for over 20 years!! He is a quiet and gentle person that is very in tune with our boarders – dogs and cats alike! He enjoys going to the gym and pizza. He rescued his cat Whitey almost 3 years ago now.


Welcome Committee

Welcome Committee Bio

We have quite a welcome committee here at Preiser Animal Hospital Urgent Care & Wellness Appointments. Although rarely will you ever see all 3 of them in one room at one time there are 3 black cats that roam the halls of Preiser Animal Hospital Urgent Care & Wellness Appointments. Chugach (aka Chewie) and his sister, Kenai came to Preiser Animal Hospital Urgent Care & Wellness Appointments as strays once upon a time. Dr. Preiser took one look at their big orange eyes and fell in love instantly. Unfortunately, her German Shepherd had different aspirations for them.  And for that reason, they came to call the hospital home.  And it truly is their home. About a year later, along came a kitten named Priscilla, also a stray, and Chewie was instantly smitten. Shortly after her arrival, Priscilla injured her arm and required a little more TLC. Chewie nursed her back to health and they have been living happily ever after since. Chewie can usually be found either on the sign-in clipboard or laying in the outgoing mailbox. Kenai is the brains of the operation.  She is also our interior decorator at times, using her nails to help re-design the upholstery. As for Miss Priss. She is less enthusiastic about dogs so she tends to take cover until things quiet down.  But when no one is around you will find her stretched out on the waiting room floor with her belly waiting to be petted or begging for water at the faucet (she has us trained quite well).


Tapping Turtle

Freddy's bio
Freddy was rescued by Dr. Preiser from a client who couldn’t take care of him anymore. He lives in Dr. Preiser’s office in his tank. He is a very social and active little guy and makes sure Dr. Preiser is always working hard in her office (when she actually can be in her office).


Use the form below to send us a message! A member of our team will get back to you as quickly as possible. If you need immediate assistance, please give us a call at 847-827-5200.


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2975 N. Milwaukee Ave
Northbrook, IL 60062
Click here for directions.


Mon - Fri: 8:00 am - 5:30 pm
Sat - Sun: Closed