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Dr. Mark Obrien, DO

Internal Medicine* Age 65
Dr. Mark Obrien, DO
3.7 (3 Ratings)
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Dr. Mark Obrien, DO is an Internist in Oceanside, CA.
Dr. Mark Obrien, DO
3.7 (3 Ratings)
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Link Copied!
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Dr. Mark Obrien, DO

Internal Medicine* Age 65
Oceanside, CA
Call for new patient details
38 years of experience
Dr. Mark Obrien, DO is an Internist in Oceanside, CA.

About

Dr. Obrien graduated from Michigan State University College of Human Medicine in 1987 and completed a residency at HENRY FORD HOSPITAL. Dr. Mark Obrien, DO is an Internist in Oceanside, CA and has 38 years experience. Dr. Obrien currently practices at Practice and are affiliated with Tri-City Medical Center. At present, Dr. Obrien received an average rating of 3.7/5 from patients and has been reviewed 3 times. Dr. Obrien's office is not accepting new patients. Dr. Obrien is board certified in Internal Medicine and accepts multiple insurance plans.

Explains Conditions Well

Patients said this doctor explains conditions well.

Trustworthy

Patients said this doctor is trustworthy.

Friendly Staff

Patients said the staff was friendly.

Compare with other Internists

Compare Dr. Obrien with our nearby Internists at Temecula Valley Hospital
These providers are on the medical staff of Temecula Valley Hospital
These providers are on the medical staff of Temecula Valley Hospital.
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Experience Check

Enter a condition or procedure
Respiratory Failure
Ganglion Cyst
Arterial Blood Gas Test (ABG)
Respiratory Failure
Ganglion Cyst
Arterial Blood Gas Test (ABG)
Abdominal Pain
Amenorrhea
Anxiety
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Aortic Embolism and Thrombosis
Arrhythmias
Atherosclerosis
Atrial Fibrillation
Bacterial Sepsis
Broken Neck
Cerebrovascular Disease
Chest Pain
Chronic Laryngitis
Chronic Pain
Coronary Artery Disease (CAD)
Diabetes Type 2
Diabetes With Renal Manifestations
Diarrhea
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Dyslipidemia
Epilepsy
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Gastroesophageal Reflux Disease (GERD)
Hepatitis E
Hypercalcemia
Hyperkalemia
Hyperlipidemia
Hypertension
Hypertensive Chronic Kidney Disease
Hypokalemia
Hyposmolality and Hyponatremia
Intestinal Obstruction
Lichen Simplex Chronicus
Low Back Pain
Nephritis and Nephropathy
Pneumonia
Prostatitis
Sexually Transmitted Diseases (STDs)
Shortness of Breath
Sinus Tachycardia
Tobacco Use Disorder
Traumatic Brain Injury
Urinary Tract Infection (UTI)
Electrocardiogram (EKG)
Abnormal Thyroid
Acidosis
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Acute Bronchitis
Acute Deep Vein Thrombosis (DVT)
Acute Kidney Failure
Acute Kidney Infection
Acute Lower Respiratory Infection
Acute Sinusitis
Acute Venous Embolism Thrombosis
ADHD and-or ADD
Adhesive Capsulitis Shoulder
Adult Failure to Thrive
Air and Gas Embolism
Alcohol Withdrawal
Alkalosis
All Headaches (incl. Migraine)
Allergic Conjunctivitis
Allergic Rhinitis
Amniotic Fluid Embolism
Anaphylactic Fruit and Vegetable Allergy
Anaphylactic Tree Nut Allergy
Anaphylaxis
Anemia
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Animal Allergies
Ankle Fracture
Aortic Aneurysm
Aortic Stenosis
Aortic Valve Disease
Arthritis
Arthritis of the Elbow
Asphyxia and Hypoxemia
Asthma
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Ataxia
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Atrial Flutter
Atrial Septal Defect
Back Pain
Bedsores
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Benign Chronic Pain Syndrome
Bladder Atony
Bladder Infection
Bleeding Disorders
Blood in Urine (Hematuria)
Bronchiectasis
Bronchitis
Bruise of Face, Scalp, or Neck
Calcium Metabolism Disorders
Cardiomyopathy
Cardiomyopathy, Dilated
Cardiomyopathy, Restrictive
Carotid Artery Disease
Cellulitis
Cerebral Artery Thrombosis
Cerebral Edema
Cerebral Embolism
Cholecystitis and Gallstones
Chronic Deep Vein Thrombosis (DVT)
Chronic Neck Pain
Chronic Pulmonary Heart Diseases (incl. Pulmonary Hypertension)
Chronic Sinusitis
Chronic Venous Embolism Thrombosis
Coccyx or Sacrum Fracture
Collapsed Lung (Pneumothorax)
Complex Regional Pain Syndrome (CRPS)
Concussion
Constipation
COPD (Chronic Obstructive Pulmonary Disease)
Cough
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Cranial Trauma
Deep Vein Thrombosis (DVT)
Dehydration
Dermatitis Due to Drugs
Dermatitis Due to Substances Taken Internally
Dermatitis Herpetiformis
Diabetes Type 1
Diabetic Ketoacidosis
Diabetic Polyneuropathy
Diaper Rash
Difficulty With Walking
Dizziness
Dry Eyes
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Duodenal Ulcer
Duodenitis
Dysphagia
Eczema and Contact Dermatitis
Embolism
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Emphysema
Enlarged Prostate (BPH)
Enteritis
Esophageal Achalasia and Cardiospasm
Esophageal Ulcer
Esophageal Varices
Esophagitis
Essential Tremor
Fever
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Fibromyalgia
Folic Acid Deficiency
Foot Infection
Gait Abnormality
Gallstones
Gas-Bloat Syndrome
Gastric Ulcer
Gastritis
Gastrointestinal Bleeding
Gastroparesis
Gastroptosis
Genu Valgum
Goiter
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Gout
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Headache
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Heart Attack (Acute Myocardial Infarction)
Heart Disease
Heart Palpitations
Heartburn
Hemispacial Neglect
Hemorrhoids
Hepatitis C
Hernia
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Herpes Simplex Infection
Herpes Zoster Without Complication
Hip Pointer
Human Immunodeficiency Virus (HIV)
Hypersensitivity Pneumonitis
Hypertensive Heart and Chronic Kidney Disease
Hypertensive Heart Disease
Hyperthyroidism
Hypoglycemia
Hypotension
Hypotension (Excluding Maternal)
Hypothyroidism
Hypoxemia
Ileus
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Iliac Aneurysm
Imperforate Hymen
Indigestion
Influenza (Flu)
Insomnia
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Interstitial Cystitis
Intertrigo
Intestinal Diverticulitis
Intestinal Diverticulosis
Intracerebral Hemorrhage
Irritable Bowel Syndrome
Joint Pain
Kidney Infection
Lactose Intolerance
Leg and Foot Ulcers
Leukocytopenia
Limb Pain
Limb Swelling
Limb Swelling Caused by Fluid Overload
Lipid Disorders
Liver Damage from Alcohol
Magnesium Metabolism Disorders
Malaise and Fatigue
Malnutrition
Mastodynia
Meningitis
Menstrual Disorders
Migraine
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Mineral Metabolism Disorders
Mitral Valve Regurgitation
Mitral Valve Stenosis
Muscle Cramping
Nail and Nail Bed Infection
Nasopharyngitis
Nausea
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Neck Strain (incl. Whiplash Injury)
Nephrotic Syndrome
Neurogenic Bladder
Nighttime Urination (Nocturia)
Non-Alcoholic Fatty Liver Disease
Noninfectious Gastroenteritis and Colitis
Obesity
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Onychogryphosis
Opioid Withdrawal
Orchitis
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Osteoarthritis
Osteoarthritis of Foot
Osteoarthritis of Hand
Osteoarthritis of Hand or Wrist
Osteoarthritis of Hip
Osteoarthritis of Hip and Thigh
Osteoarthritis of Knee
Osteoarthritis of Shoulder
Osteoarthritis of Spine
Osteopenia
Osteoporosis
Overactive Bladder
Overweight
Pancreatitis
Patellofemoral Pain Syndrome (PFPS)
Pelvic Abscess
Pelvic Fracture
Perforated Eardrum
Pericardial Disease
Peripheral Nerve Disorders
Peripheral Vascular Disease (PAD, PVD)
Phlebitis and Thrombophlebitis
Phosphorus Metabolism Disorders
Pinkeye (Conjunctivitis)
Polymyalgia Rheumatica (PMR)
Polyneuropathy
Polyuria
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Postherpetic Neuralgia
Pulmonary Edema
Pulmonary Hypertension
Purpura
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Radiculopathy
Rash
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Reflux Esophagitis
Restless Leg Syndrome
Rhabdomyolysis
Rheumatic Aortic Valve Disorders
Rib Fracture
Ringworm
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Salivary Gland Stones and Inflammation
Sarcoidosis
Sciatica
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Seborrheic Dermatitis
Secondary Diabetes Mellitus
Secondary Hypertension
Secondary Renovascular Hypertension
Serous Conjunctivitis
Shingles
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Shoulder Tendinitis and Tenosynovitis
Sick Sinus Syndrome
Sinus Bradycardia
Sinusitis
Skin Ulcer
Sleep Apnea
Spinal Cord Injury
Sprains and Strains (incl. Muscle Tear)
Stroke
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Stye
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Subdural Hemorrhage
Sunburn
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Supraventricular Tachycardia
Swine Flu
Syphilis Infections
Third Degree Heart Block
Thrush
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Thyroid Goiter
Tonsillitis
Torticollis
Transient Ischemic Attack (TIA)
Tremor
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Tricuspid Valve Disease
Trigeminal Neuralgia
Type 2 Heart Block - Mobitz
Unstable Angina
Urinary Incontinence
Urinary Stones
Venous Embolism and Thrombosis
Venous Insufficiency
Ventricular Tachycardia (VT)
Vertigo
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Viral Hepatitis
Viral Infection
Vitamin B Deficiency
Vitamin D Deficiency
Wheezing
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Wrist Sprain or Strain
Yeast Infections
Advance Directive End of Life Planning
Care Coordination for Complex Conditions and Procedures
Fecal Occult Blood Test for Colorectal Cancer
Immunization Administration
Nail Avulsion and Excision

Insurance Accepted

* Please verify this information when scheduling an appointment.
  • CA Healthnet PPO
  • BlueCard PPO
    Blue Card High Performance Network HPN
  • High Performance Network HPN
    Prudent Buyer Individual CA PPO
    Prudent Buyer Large Group CA PPO
  • Cigna HMO
  • HealthyBlue Advantage
  • Advantage Preferred DirectAccess Plus PPO
    Select PPO

Locations

  1. 1 Tri-City Medical Center
    4002 Vista Way, Oceanside, CA 92056
  2. 2 Wu Medical Corporation
    3156 Vista Way Ste 405, Oceanside, CA 92056
  3. 3 Office
    2604 El Camino Real Ste B, Carlsbad, CA 92008

Patient Satisfaction

Likelihood to recommend Dr. Obrien
3.7
Based on 3 Reviews
5 Stars (2)
4 Stars (0)
3 Stars (0)
2 Stars (0)
1 Star (1)

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Patient Reviews
Feb 14, 2025
Dr. O'Brien's new Internal Medicine practice is absolutely top notch. His front office staff is super friendly, the billing is simple, and Dr. O'Brien's bedside manner is absolutely impeccable. Looking forward to visiting him more in the future!
Tim H — Feb 14, 2025
See more reviews on Healthgrades
Photo: Dr. Mark Obrien, DO
How would you rate your experience with Dr. Mark Obrien, DO?
  • Likelihood of recommending Dr. Obrien to family and friends

Dr. Obrien's Office & Staff

  • Ease of scheduling urgent appointments
  • Office environment, cleanliness, comfort, etc.
  • Staff friendliness and courteousness
  • Total wait time (waiting & exam rooms)

Experience with Dr. Obrien

  • Level of trust in provider's decisions
  • How well provider explains medical condition(s)
  • How well provider listens and answers questions
  • Hpends appropriate amount of time with patients

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About Me

Specialties*
Internal Medicine
Hospital Medicine
Specialties*
  • *Sharecare does not verify qualifications for medical specialties. Please verify your provider's specialty and qualifications directly with your provider and applicable medical board.
Education

Education

Medical Education
  • Michigan State University College of Human Medicine
    1987
Medical Education

Board Certifications

Board Certifications
  • Internal Medicine
Board Certifications
What’s a board certification and why is it important that my provider has one?

A board certification represents a provider’s dedication to ongoing training in one or more specialties, including the completion of intensive exams. While not all specialties have board certifications, if your provider does have one they’ve taken the extra step to master their specialty and to keep up with the latest advancements in their field.

Internship

Internship
  • Flint Osteo Hospital
    1988
Internship

Residency

Residency Hospital
  • HENRY FORD HOSPITAL
    1991
Residency Hospital
Common Questions and Answers
Responses are sourced directly from patients.
Does Dr. Obrien communicate via email?
2 users said yes.
Yes
(2)
No
(0)
Does Dr. Obrien offer telehealth services or virtual visits?
1 user said yes.
Yes
(1)
No
(1)
Does Dr. Obrien offer an online patient portal?
1 user said yes.
Yes
(1)
No
(1)
Does Dr. Obrien have free onsite parking?
2 users said yes.
Yes
(2)
No
(0)
Does Dr. Obrien offer weekend visits?
No users said yes.
Yes
(0)
No
(2)
Does Dr. Obrien offer evening visits?
No users said yes.
Yes
(0)
No
(2)
Does Dr. Obrien specialize in working with children or adolescents?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Obrien specialize in working with seniors?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Obrien specialize in couples therapy?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Obrien specialize in working with LGBTQ+ community?
No responses yet.
Yes
(0)
No
(0)
Does Dr. Obrien accept insurance?
No responses yet.
Yes
(0)
No
(0)

Frequently Asked Questions

Find contact information here to make an appointment.

A list of accepted insurance providers is available on the Sharecare insurance check. It is always a good idea to verify your insurance when making an appointment.

New patients are generally accepted by Dr. Mark Obrien, DO. To arrange an appointment, call the number on Dr. Obrien's profile.

Dr. Mark Obrien, DO is affiliated with Tri-City Medical Center.

Yes, Dr. Mark Obrien, DO holds board certification in Internal Medicine.

Hospital Affiliations

  • Tri-City Medical Center

    4002 Vista Way, Oceanside, CA