
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Hsu, Hospitalist in Fullerton, CA?
Dr. Keith Hsu, MD is a Hospitalist, who primarily practices in Fullerton, CA with 2 additional practice locations. He is board certified. Dr. Hsu graduated from Case Western Reserve University School of Medicine. Dr. Hsu is fluent in English and Chinese, and is currently seeing new patients. Dr. Hsu’s practice accepts Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Hsu’s office at (949) 364-6000.
Where did Dr. Hsu go to medical school and complete their residency?
Medical School: Case Western Reserve University School of Medicine
Is Dr. Hsu board certified as a Hospitalist?
Yes, Dr. Keith Hsu, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Hsu speak?
Dr. Hsu and their clinical team can communicate with patients in the following languages:
Chinese
English
What conditions does a Hospitalist like Dr. Hsu typically treat?
As a Hospitalist, Dr. Hsu diagnoses, treats, and manages a wide range of conditions. This condition information is derived from anonymized insurance claims and highlights the medical conditions most commonly treated by Dr. Hsu. It provides insight into the doctor’s areas of experience and expertise based on real-world patient encounters from the past two years, updated quarterly. Learn more about our claims-based healthcare methodology.
Also known as:
- Sepsis
- Blood Poisoning
- Septicemia
- Systemic Bacterial Infection
ICD-10 Codes:
- A419: Sepsis, unspecified organism
Also known as:
- Acute Respiratory Failure with Low Oxygen
- Respiratory Failure
- Sudden lung failure with low oxygen
- Hypoxic respiratory failure
- Acute breathing failure with hypoxia
ICD-10 Codes:
- J9601: Acute respiratory failure with hypoxia
Also known as:
- Ischemic Stroke
- Brain Attack
- Cerebral Infarction
- Brain Ischemia
ICD-10 Codes:
- I639: Cerebral infarction, unspecified
Also known as:
- Chest Pain
- Chest discomfort
- Thoracic pain
- Upper body pain
ICD-10 Codes:
- R079: Chest pain, unspecified
Also known as:
- Pneumonia
- Lung Infection
- Chest Infection
- Pneumonitis
ICD-10 Codes:
- J189: Pneumonia, unspecified organism
Also known as:
- Metabolic Brain Disorder
- Brain Disease
- Metabolic Encephalopathy
- Brain Dysfunction from Metabolism
ICD-10 Codes:
- G9341: Metabolic encephalopathy
Also known as:
- Urinary Tract Infection
- UTI
- Bladder infection
- Kidney infection
- Urine infection
ICD-10 Codes:
- N390: Urinary tract infection, site not specified
Also known as:
- Heart Failure
- Congestive Heart Failure
- CHF
- Cardiac Insufficiency
ICD-10 Codes:
- I509: Heart failure, unspecified
Also known as:
- Atrial Fibrillation
- Afib
- A-fib
- Irregular heart rhythm
ICD-10 Codes:
- I4891: Unspecified atrial fibrillation
What procedures does a Hospitalist like Dr. Hsu typically perform?
As a Hospitalist, procedures performed by Dr. Keith Hsu may include:
Please contact Dr. Hsu's office directly to confirm care for your specific procedure, for more information, or to schedule a consultation.
Does Dr. Hsu accept my insurance?
Dr. Hsu accepts most major insurance plans. Important: Please call our office at (949) 364-6000 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Hsu accept in Fullerton, CA?
Dr. Hsu in Fullerton, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Alignment Healthcare
All Other Third Party
Centene Corporation
CVS Health (formerly Aetna)
Humana
Medicare
Other Health Care Provider
State of California
UnitedHealth Group
Unknown
View All Insurances
Where is Dr. Hsu's office located?
Dr. Keith Hsu's Primary Practice
1950 Sunny Crest Dr Ste 2900
Fullerton, CA 92835
(949) 364-6000
What is Dr. Hsu's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Hsu's National Provider Identifier (NPI) number is 1891921458.
What common questions do patients ask about Dr. Hsu?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Hsu
What is Dr. Keith Hsu's specialty?
Dr. Hsu is a Hospitalist near Fullerton, CA.
What does a Hospitalist do?
Hospitalists are physicians dedicated primarily to the general medical care of hospitalized patients. Their roles encompass patient care, education, research, and leadership within the field of Hospital Medicine. The term "hospitalist" specifically refers to physicians who focus on delivering care to patients during their hospital stays.
Is this Dr. Keith Hsu affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Hsu is affiliated with Providence Mission Hospital Mission Viejo which is a Castle Connolly Top Hospital. Castle Connolly Top Hospitals are healthcare institutions recognized for their excellence in specific medical procedures and overall patient care. They are identified through a rigorous peer nomination process, evaluating factors like patient outcomes, quality of care, and expertise. The list recognizes hospitals that excel in 20 or more specific medical procedures, representing the top 25% nationwide. Castle Connolly Top Hospitals
When to see a Hospitalist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Hospitalist. Explore insights from trusted medical experts on EverydayHealth.com, where you'll find the most relevant content and helpful condition guides for up-to date information about symptoms, causes, diagnosis, treatment and more. See all our health guides to find trusted information on medical conditions from our experts at Everyday Health.
Is Keith Hsu accepting new patients in Fullerton, CA?
Yes, Dr. Keith Hsu is accepting new patients at this time.
Does Dr. Keith Hsu offer online booking?
Please contact Dr. Hsu's office at (949) 364-6000 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Keith Hsu?
Please contact Dr. Hsu's office at (949) 364-6000 for information regarding telehealth appointment availability or for scheduling assistance.
Which board certifications does Dr. Keith Hsu have?
Dr. Keith Hsu is certified by the American Board of Internal Medicine.
Other Hospitalist Near Fullerton, CA

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Dr. Roger Chang, MD is a Hospitalist, who primarily practices in Fullerton, CA with 2 additional practice locations. He has been practicing for over 18 years.
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Dr. Reza Dehkordi, MD is a Hospitalist, who primarily practices in Fullerton, CA with 2 additional practice locations. He has been practicing for over 23 years and is board certified.
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