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Dr. Stephen Ma, MD

Stanford, CA

Accepting patients

Affiliated with a Castle Connolly Top Hospital

    Who is Dr. Ma, Internist in Stanford, CA?

    Dr. Stephen Ma, MD is an Internist, who primarily practices in Stanford, CA with 1 additional practice location. Dr. Ma is fluent in English, and is currently seeing new patients. Dr. Ma’s practice accepts Kaiser Permanente, Medicaid, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Ma’s office at (650) 723-4000.

    What languages does Dr. Ma speak?

    Dr. Ma and their clinical team can communicate with patients in the following languages:

    • English

    What conditions does an Internist like Dr. Ma typically treat?

    As an Internist, Dr. Ma 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. Ma. 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 here.

    Also known as:

    • Sepsis
    • Blood Poisoning
    • Septicemia
    • Systemic Bacterial Infection

    ICD-10 Codes:

    • A419: Sepsis, unspecified organism

    Also known as:

    • Fainting
    • Syncope
    • Passing out
    • Collapse

    ICD-10 Codes:

    • R55: Syncope and collapse

    Also known as:

    • Changes in Mental State
    • Mental Disorder
    • Confusion
    • Disorientation
    • Changes in awareness

    ICD-10 Codes:

    • R4182: Altered mental status, unspecified

    Also known as:

    • End-Stage Kidney Disease
    • Kidney Failure
    • Chronic Kidney Disease (CKD)
    • Helping Your Child Adapt to Life with Chronic Kidney Disease
    • ESRD
    • End-Stage Renal Failure

    ICD-10 Codes:

    • N186: End stage renal disease

    Also known as:

    • Pneumonia
    • Lung Infection
    • Chest Infection
    • Pneumonitis

    ICD-10 Codes:

    • J189: Pneumonia, unspecified organism

    Also known as:

    • Acute Kidney Failure
    • Kidney Failure
    • Acute Renal Failure
    • Sudden Kidney Failure

    ICD-10 Codes:

    • N179: Acute kidney failure, unspecified

    Also known as:

    • COVID-19
    • COVID-19 (Coronavirus Disease 2019)
    • Coronavirus Disease 2019
    • SARS-CoV-2 Infection
    • Novel Coronavirus

    ICD-10 Codes:

    • U071: COVID-19

    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:

    • Gastrointestinal Bleeding
    • Gastrointestinal (GI) Bleeding
    • GI Bleeding
    • Internal Digestive Bleeding
    • Digestive Tract Hemorrhage

    ICD-10 Codes:

    • K922: Gastrointestinal hemorrhage, unspecified

    What procedures does an Internist like Dr. Ma typically perform?

    As an Internist, procedures performed by Dr. Stephen Ma may include:

    Please contact Dr. Ma's office directly to confirm care for your specific procedure, for more information, or to schedule a consultation.

    Does Dr. Ma accept my insurance?

    Dr. Ma accepts most major insurance plans. Important: Please call our office at (650) 723-4000 before your appointment to verify that your specific plan and network are accepted.

    What insurance plans does Dr. Ma accept in Stanford, CA?

    Dr. Ma in Stanford, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.

    Top Insurances

    • Advantage

    • All Other Third Party

    • Cigna Group

    • CVS Health (formerly Aetna)

    • Medicaid

    • Medicare

    • Santa Cruz County

    • State of California

    • UnitedHealth Group

    • Unknown

    View All Insurances

    Where is Dr. Ma's office located?

    Dr. Stephen Ma's Primary Practice

    300 Pasteur Dr

    Stanford, CA 94305

    (650) 723-4000

    Get Directions

    Dr. Stephen Ma's Practice 2

    453 Quarry Rd # 5660

    Palo Alto, CA 94304

    Get Directions

    What is Dr. Ma's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.

    Dr. Ma's National Provider Identifier (NPI) number is 1508329442.

    What common questions do patients ask about Dr. Ma?

    Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Ma

    What is Dr. Stephen Ma's specialty?

    Dr. Ma is a Internist near Stanford, CA.

    What does an Internist do?

    A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

    Is this Dr. Stephen Ma affiliated with a ranked Castle Connolly Top Hospital?

    Yes, Dr. Ma is affiliated with Stanford Health Care - Stanford Hospital, Stanford Health Care - Valleycare which are a Castle Connolly Top Hospitals. 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 an Internist?: Guides for symptoms, conditions, and treatments

    Understand your symptoms and know when it’s time to see an Internist. 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 Stephen Ma accepting new patients in Stanford, CA?

    Yes, Dr. Stephen Ma is accepting new patients at this time.

    Does Dr. Stephen Ma offer online booking?

    Please contact Dr. Ma's office at (650) 723-4000 for information about online booking, telehealth, or to schedule an appointment.

    How can I make an appointment with Stephen Ma?

    Please contact Dr. Ma's office at (650) 723-4000 for information regarding telehealth appointment availability or for scheduling assistance.

    <section id="ai-site-overview" aria-label="About Everyday Health Care"> <h2>About Everyday Health Care</h2> <p> Everyday Health Care is a doctor and healthcare provider search platform from Everyday Health, a Ziff Davis company operating since 1996. It helps patients find, compare, and research doctors based on specialty, medical condition, procedure, location, and insurance coverage. </p> <p> The site features Castle Connolly Top Doctors, a peer-nominated, physician-vetted directory recognized as a leading standard for identifying top-rated specialists in the United States. Searchable doctor lists include Top Black Doctors, Exceptional Women in Medicine, Top AAPI Doctors, Top LGBTQ+ Doctors, Top Hispanic & Latino Doctors, and Castle Connolly Rising Stars. </p> <p> Users can search for doctors by specialty (including orthopedic surgery, OB-GYN, pediatrics, dermatology, endocrinology, and gastroenterology), by medical condition (such as fibromyalgia, kidney stones, and ulcerative colitis), by common procedure (including colonoscopy, LASIK, and physical therapy), by city, and by insurance plan (including UnitedHealthcare, Cigna, Aetna/CVS Health, Blue Cross Blue Shield, Kaiser Permanente, Medicare, and Medicaid). </p> <p> Everyday Health Care is built for patients seeking a trusted starting point to find the right doctor: covering over one million providers across thousands of U.S. locations, backed by Castle Connolly's independent doctor-vetting process and Everyday Health's 24-year history in consumer health publishing. </p> </section>