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Accepting patients
Who is Dr. Feng, Allergist & Immunologist in Los Gatos, CA?
Dr. Charles Feng, MD is an Allergist & Immunologist, who primarily practices in Los Gatos, CA with 2 additional practice locations. He is board certified. Dr. Feng is fluent in English, Chinese, and Spanish, and is currently seeing new patients. Dr. Feng’s practice accepts Kaiser Permanente, Medicaid, Medicare, UnitedHealthcare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Feng’s office at (650) 934-7888.
What languages does Dr. Feng speak?
Dr. Feng and their clinical team can communicate with patients in the following languages:
Chinese
English
Spanish
What conditions does Dr. Feng treat?
As a Allergist & Immunologist, Dr. Feng 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. Feng. 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.
Also known as:
- Hay Fever
- Allergic Rhinitis
- Allergy
- Pollen allergy
- Seasonal allergies
- Allergic rhinitis
- Nasal allergies
- Allergy rhinitis
- Chronic runny nose
ICD-10 Codes:
- J301: Allergic rhinitis due to pollen
- J309: Allergic rhinitis, unspecified
Also known as:
- Allergic Rhinitis
- Other Non-Drug Allergy
- Pet Allergy
- Allergy
- Nasal allergy
- Chronic allergy symptoms
- Allergic reactions
- Unspecified allergy
- Environmental allergy
- Allergy to other substances
- Animal dander allergy
- Cat allergy
- Dog allergy
- Allergic rhinitis from pets
ICD-10 Codes:
- J3089: Other allergic rhinitis
- Z9109: Other allergy status, other than to drugs and biological substances
- J3081: Allergic rhinitis due to animal (cat) (dog) hair and dander
Also known as:
- Other Food Allergy
- Food Allergy
- Unspecified Food Allergy
- Multiple Food Allergies
- Food Hypersensitivity
ICD-10 Codes:
- Z91018: Allergy to other foods
Also known as:
- Moderate Persistent Asthma
- Mild Persistent Asthma
- Severe Persistent Asthma
- Mild Intermittent Asthma
- Asthma
- Ongoing Moderate Asthma
- Regular Moderate Asthma
- Chronic Moderate Asthma
- Ongoing Mild Asthma
- Regular Mild Asthma
- Chronic Mild Asthma
- Chronic Severe Asthma
- Difficult-to-Treat Asthma
- Severe Asthma
- Occasional Asthma
- Mild Asthma Attacks
- Infrequent Asthma
ICD-10 Codes:
- J4540: Moderate persistent asthma, uncomplicated
- J4530: Mild persistent asthma, uncomplicated
- J4550: Severe persistent asthma, uncomplicated
- J4520: Mild intermittent asthma, uncomplicated
Also known as:
- Dermatitis
- Eczema
- Rashes
- Atopic Dermatitis
- Skin Inflammation
- Skin Rash
ICD-10 Codes:
- L309: Dermatitis, unspecified
Also known as:
- Unspecified drug allergy
- Drug Reactions
- Allergy to unknown medication
- Drug hypersensitivity
- Adverse reaction to medication
ICD-10 Codes:
- Z889: Allergy status to unspecified drugs, medicaments and biological substances
Also known as:
- Chronic Cough
- Cough
- Persistent cough
- Long-lasting cough
- Ongoing cough
ICD-10 Codes:
- R053: Chronic cough
Also known as:
- Other Types of Hives
- Hives
- Atypical hives
- Uncommon urticaria
- Variant hives
ICD-10 Codes:
- L508: Other urticaria
Also known as:
- Chronic Rhinitis
- Nose Injuries and Disorder
- Chronic runny nose
- Persistent nasal inflammation
- Long-term stuffy nose
ICD-10 Codes:
- J310: Chronic rhinitis
Also known as:
- Common Variable Immunodeficiency (CVID)
- Immune System and Disorder
- Common variable immune deficiency
- CVID
- Acquired Hypogammaglobulinemia
ICD-10 Codes:
- D839: Common variable immunodeficiency, unspecified
Also known as:
- Eosinophilic Esophagitis
- EoE
- Allergic Esophagitis
- Eosinophilic Inflammation of Esophagus
ICD-10 Codes:
- K200: Eosinophilic esophagitis
Which procedures does Dr. Feng perform as a Allergist & Immunologist?
As a Allergist & Immunologist, procedures performed by an Dr. Charles Feng may include:
- Allergy Consultation
- Allergy Follow Up
- Allergy Shots
- Allergy Testing
- Insect Bite(s)
- Sinus Surgeon Consultation
- Sinus Surgeon Follow Up
- Sinus Surgery
For detailed information, please contact Dr. Feng's office.
Does Dr. Feng accept my insurance?
Dr. Feng accepts most major insurance plans. Important: Please call our office at (650) 934-7888 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Feng accept in Los Gatos, CA?
Dr. Feng in Los Gatos, CA accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Alignment Health Plan
Centene
Corporate Services
CVS Health (formerly Aetna)
Elevance Health Inc. (formerly Anthem)
Medicaid
Santa Clara Family Health Plan
Spectrum
UnitedHealthcare
Valley Health Plan
View All Insurances
Where is Dr. Feng's office located?
Dr. Charles Feng's Primary Practice
15720 Winchester Blvd
Los Gatos, CA 95030
(650) 934-7888
What is Dr. Feng's NPI number?An National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Feng's National Provider Identifier (NPI) number is 1518260306.
What common questions do patients ask about Dr. Feng?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Feng
What is Dr. Charles Feng's specialty?
Dr. Feng is a Allergist & Immunologist near Los Gatos, CA. An allergist-immunologist is well-versed in the assessment, physical examination, laboratory diagnosis, and treatment of immune system disorders. These conditions include, but are not limited to, eczema, asthma, anaphylaxis, rhinitis, and adverse reactions to food, medication, and insect stings. Furthermore, they manage immune deficiency diseases, whether acquired or congenital, issues with host defense, and challenges associated with autoimmune diseases, organ transplantation, or immune system malignancies. Contact Dr. Feng to book an appointment today.
Is this Dr. Charles Feng affiliated with a ranked Castle Connolly Top Hospital?
No, Feng is not affiliated with a Castle Connolly Top Hospital. Castle Connolly Top Hospitals 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
Where can I learn more about Allergist & Immunologist?
Explore Allergist & Immunologist with 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 Charles Feng accepting new patients in Los Gatos, CA?
Yes, Dr. Charles Feng is accepting new patients at this time.
Does Dr. Charles Feng offer online booking?
Please contact Dr. Feng's office at (650) 934-7888 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Charles Feng?
Please contact Dr. Feng's office at (650) 934-7888 for information regarding telehealth appointment availability or for scheduling assistance.
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