Dr. Oksana Hirniak, DO is a family medicine specialist in San Marcos, CA and has been practicing for 9 years. She specializes in family medicine, osteopathic manipulative therapy, and more.


Graybill Medical Group

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(858) 437-9976
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  • Hours
    • Mon: 8:00am - 5:00pm
    • Tue: 8:00am - 5:00pm
    • Wed: 8:00am - 5:00pm
    • Thu: 8:00am - 5:00pm
    • Fri: 8:00am - 5:00pm
    • Sat: closed
    • Sun: closed
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Dr. Hirniak accepts

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(858) 437-9976

Dr. Hirniak accepts the following insurance:

Anthem Blue Cross
Anthem Blue Cross Blue Shield
Anthem Blue Cross Life and Health Insurance Company
Beech Street (Multiplan)
Blue Cross Blue Shield
Blue Shield of California
Coventry Health Care
First Health (Coventry Health Care)
Health Net
Health Net of California
Railroad Medicare
Sharp Health Plan
UnitedHealthcare of California

Background Check

No malpractice claims found for California
No disciplinary actions found for the years we collect data
No board actions found for the years we collect data
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Experience Check

Check if Dr. Hirniak treats your condition or procedure

Dr. Hirniak's conditions and procedures:

  • Abnormal Heart Beat
  • Acne
  • Acute Bronchitis
  • ADHD and-or ADD
  • Adverse Reaction to Food
  • Age-Related Cognitive Decline
  • AIDS
  • Allergic Reaction
  • Allergic Rhinitis Due to Pollen
  • Alzheimer's Disease
  • Amenorrhea
  • Anemia
  • Ankle Sprain
  • Arteriosclerosis
  • Arthritis
  • Arthrosclerosis
  • Asthma
  • Atherosclerosis
  • Athlete's Foot
  • Atopic Dermatitis (Eczema)
  • Birth Control
  • Black Eye
  • Blood in Semen (Hematospermia)
  • Blood Pressure Management
  • Blood Sugar Monitoring
  • Bone Loss
  • Breast Exam
  • Bulimia
  • Bursitis
  • Canker Sore
  • Chalazion
  • Chickenpox
  • Cholesterol Diseases
  • Chronic Bronchitis
  • Chronic Sinusitis
  • Classic Migraine
  • Colitis
  • Colposcopy
  • Common Cold
  • Common Migraine
  • Concussion
  • Congestive Heart Failure
  • COPD (Chronic Obstructive Pulmonary Disease)
  • Crohn's Disease
  • Dandruff
  • Dementia
  • Depressive Disorders
  • Dermatitis
  • Diabetes
  • Diabetes Counseling
  • Diabetic Evaluation
  • Diabetic Foot Care
  • Diabetic Wound Care
  • Diarrhea
  • Disease Prevention
  • Dizziness
  • Dysmenorrhea
  • Ear Ache
  • Ear Infection
  • Elbow Bursitis
  • Emphysema
  • Erectile Dysfunction
  • Esophagitis
  • Excessive Daytime Sleepiness
  • Excessive Menstrual Bleeding
  • Female Genital Disorders
  • Fever
  • Flashes
  • Flatulence
  • Folliculitis
  • Food Additive Allergy
  • Frequent Heartburn
  • Fungal Infections
  • Fungal Nail Infection
  • Gastritis
  • Gastroesophageal Reflux Disease (GERD)
  • Golfer's Elbow (Medial Epicondylitis)
  • Gout
  • Gynecologic Cancer Screening
  • Hair Loss
  • Halitosis
  • Hand Foot and Mouth Disease
  • Hay Fever-Like Sneezing
  • Headache
  • Heart Disease
  • Heart Palpitations
  • Heartburn
  • Hemorrhoids
  • High Cholesterol
  • High Triglycerides
  • Hives
  • Hoarse Voice (Dysphonia)
  • Human Bite
  • Hyperlipidemia
  • Hypertension
  • Hypoglycemia
  • IBS Associated With Inflammatory Bowel Disease
  • Immunization
  • Impaired Cognition
  • Impetigo
  • Incontinence
  • Indigestion, Non-Ulcer
  • Infections
  • Infectious Diseases
  • Inflammatory Bowel Disease
  • Influenza (Flu)
  • Influenza With Gastrointestinal Tract Involvement
  • Influenza, Type A
  • Injuries
  • Insomnia
  • Intrauterine Device (IUD) Placement
  • Intrauterine Device (IUD) Removal
  • Iron Overload
  • Irregular Periods
  • Irritable Bowel Syndrome
  • Irritable Bowel Syndrome With Diarrhea
  • Itchy Skin
  • Jock Itch
  • Lactose Intolerance
  • Laryngitis
  • Loss of Consciousness
  • Male Sexual Conditions
  • Management of Multiple Medical Conditions in the Elderly
  • Measles
  • Menopause
  • Metabolic Syndrome
  • Migraine
  • Mild Cognitive Impairment
  • Mumps
  • Nausea
  • Obesity
  • Osteoarthritis
  • Osteopathic Manipulative Treatment (OMT)
  • Osteoporosis
  • Osteoporosis Management
  • Outer Ear Infection
  • Pap Smear
  • Pelvic Exams
  • Physical Examination
  • Physical Exams for Sports, School and Summer Camp
  • Plantar Fasciitis
  • Pleurisy
  • Pneumonia
  • Poison Ivy Poisoning
  • Poison Ivy, Poison Oak, or Poison Sumac Poisoning
  • Poor Circulation
  • Postnasal Drip
  • Primary and Preventive Care for Children and Adolescents
  • Primary Care for Adolescents
  • Primary Care for Adults
  • Prostatitis
  • Pruritus Ani
  • Pubic Lice (Crabs)
  • Ragweed Allergy
  • Rapid Flu Test
  • Rickets
  • Rosacea
  • Rotavirus
  • Runny Nose
  • Sarcopenia
  • Sexually Transmitted Diseases (STDs)
  • Shigella
  • Shingles
  • Sick Child Care
  • Sick Patient Care
  • Sinusitis
  • Skin Biopsy
  • Sleep Apnea
  • Sleep Deprivation
  • Smallpox
  • Smokers' Cough
  • Sore Throat
  • Splinting
  • Sports Injuries
  • Sports Physical Examination
  • Sprain
  • Strep Throat
  • Stroke Prevention
  • Sweaty Palms
  • Tendonitis
  • Tennis Elbow (Lateral Epicondylitis)
  • Tick Bite
  • Tick-Borne Disease
  • Trichomoniasis
  • Trigger Finger
  • Ulcer
  • Ulcerative Colitis
  • Unexplained Weight Loss
  • Urinary Incontinence
  • Urinary Retention
  • Urinary Urgency
  • Urticaria Due to Cold
  • Vaccination
  • Vertigo
  • Vitamin B12 Deficiency
  • Vomiting
  • Wear and Tear Arthritis
  • Well Baby Care
  • Well Child Examination
  • Well Male Examination
  • Well Woman Health Examination
  • Wellness Examination

About Me

Dr. Oksana Hirniak is board certified in Family Medicine and specializes in providing comprehensive medical care to patients of all ages. She enjoys working with her patients to develop a customized medical plan for optimum health.


  • Family Medicine
  • Adult Medicine
  • Female Adolescent Medicine
  • General Medical Practice

Board Certifications


Naval Hospital Camp Pendleton
Residency Hospital
Naval Hospital Camp Pendleton
Internship Hospital
Philadelphia College of Osteopathic Medicine
Medical School
Millers University
Undergraduate School


  • Russian
  • Ukrainian
  • English


Dr. Hirniak's Reviews

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Average Reported Wait Time
  • 10 – 15 minutes
Dr. Hirniak's Performance
  • Trustworthiness
  • Explains condition(s) well
  • Answers questions
  • Time well spent
Office & Staff Performance
  • Scheduling
  • Office environment
  • Staff friendliness
What People Say About Dr. Oksana Hirniak, DO
RecentHighestLowestMost Helpful
The worst doctor ever, she don’t care her patients
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Dr. Hirniak did not seem to care about my health when I visited for my annual. She asked me if I had done a PAP smear in the last 2 years and I said I thought I had, but wasn't sure. She said she'd take my word for it and just decided not to do it. I'm confused, isn't that required by law if I don't have one on record? Also, I was asked to fill out a form about my general health before seeing the Dr. But, during my visit, she didn't even LOOK at the form. Pointless. Avoid!
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Dr. Hirniak and her staff are amazing. She has been a rock for me and my family in helping me navigate through breast cancer, diverticulitis and a gynecological issue and I have appreciated the personal phone calls she has made to explain test results, or to see how I am doing and the time she and her staff spend on my care. I have my husband, son and daughter seeing her now and I also referred a friend who is happy also.
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This woman is highly incompetent. In addition to getting no answers out of her, she also decides what's best for you without actually consulting you. If I could give her ZERO STARS, I would.
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The front staff and nurse were very courteous and professional. I was able to get in to see Dr. Hirniak with only 1 day notice. She was very pleasant and concerned about my issue. She asked several questions to be thorough in her treatment. I was very pleased with the visit.
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She is very friendly, patient and answered all of my questions. I can tell she is very knowledgeable about medicine.
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My Dr left the practice so I was scheduled with Dr Hirniak. I was not impressed right off. She has no facial expression or personality. Did not try to get to know me as a new patient and seemed my condition was all my fault. She did not include me in decisions of treatment or medications, in fact spoke to me very little. I would not go back to her or recommend her in any way.
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