Are you having back pain with any of the following?

  • Severe pain, weakness or tingling in your leg(s).
  • Difficulty stopping urination or loss of control of bladder or bowels.
  • Unexplained fever, nausea or vomiting.
  • A history of cancer or unexplained weight loss.

We understand that you are experiencing one or more of the health issues that might be impacting your back pain.

We recommend that you discuss these health issues with your doctor before proceeding with this program.

Once you are cleared by your doctor to do this program, we hope it helps you find relief from your back pain.

Provider photo for Yi-Fen Chen

Yi-Fen Chen, MD

Internal Medicine

As your physician, I value my relationship with you. And I know that maintaining a good relationship means being able to communicate with each other. My colleagues and I have developed My Doctor Online so that we can stay in touch more easily. I believe a strong physician patient relationship is important in guiding you through health care decisions. Together we can team up to help you find healthy living.

My Offices

Santa Clara Homestead
Appt/Advice: 1-408-554-9800

See all office information »

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Frequently Asked Questions (FAQs)

Common Questions About Internal Medicine

Here are answers to some common questions you may have about the Medicine department.

What is Internal Medicine?

Physicians in Internal Medicine provide comprehensive care for adults ages 18 and over. This includes preventive care, care for acute illnesses, and ongoing care for chronic conditions. Some physicians in Internal Medicine have a subspecialty such as infectious diseases or geriatrics.

What specialists work in the Internal Medicine department?

Internal Medicine physicians, family medicine physicians, nurse practitioners, and physician assistants may practice in the Internal Medicine department. Internal Medicine physicians specialize in treating adults 18 and over. Family medicine physicians are trained to provide care to people of all ages. Nurse practitioners are nurses with advanced education and licenses that allow them to diagnose and manage medical conditions within their specialty. Physician assistants are licensed to work under the supervision of a physician.

How much training do physicians in Internal Medicine have?

In addition to graduating from medical school, our Internal Medicine and family medicine physicians have completed a 3-year residency training program in internal or family medicine. If they decide to pursue further specialty training, then they complete an additional fellowship. After training is completed, an Internal Medicine or family medicine physician takes an exam in order to become "board certified." This distinguishes the physician as a true specialist in his or her field. Continued certification is achieved through periodic exams and specialized classes throughout the physician's career. All of our internal medicine and family medicine physicians are board certified or are in the process of achieving this designation.

We also have nurse practitioners (NPs) providing care to our patients.  In addition to graduating from a 4-year nursing program, NPs have considerable hands-on work experience and specialized training.

How do I choose a physician in the Internal Medicine department?

You can browse through the professional and personal profiles of Internal Medicine clinicians on the My Doctor Online website. Our Choose your Doctor page will allow you to find clinicians in your area. You can also see whether they are fluent in your primary language. Talk to your friends or to other practitioners you see at Kaiser Permanente as they might  be able to recommend an Internal Medicine doctor  in your area.  Some people choose to have a nurse practitioner as their primary care practitioner.

How often should I come in for a visit?

How often you come in for a visit is something you and your personal physician can discuss. Depending on your age and whether you have a chronic condition, you may need screening tests or immunizations. We feel it's very important to get all the preventive care you need.

How can I contact my doctor?

For any medical emergencies, you should call 911 or go to the nearest Emergency Department.

You may reach us by calling our 24-hour Appointment and Advice line or by sending us a secure nonurgent message through your account. I will respond within 2 business days if I am not away from the office. Please e-mail nonurgent concerns only. For urgent concerns, call the 24-hour Appointment and Advice line. You can also fax information to the clinic, if needed, to the following fax numbers:

Medicine Module 260 is 408-851-2159
Medicine Module 272 is 408-851-2009
Medicine Module 360 is 408-851-3392
Medicine Module 372 is 408-851-3209


Will I always see the same doctor?

Usually, yes! However, you may not see your own doctor if you want a certain day and/or time for your appointment and your physician is not in the office at that time. You may also see a new doctor if you need an urgent or same-day appointment.

How do I make an appointment?

You can make or cancel routine appointments and view future appointments anytime at You must be registered to access these secure features on our Web site. To register, visit To schedule routine and urgent care appointments by phone, call our 24-hour Appointment and Advice line.

Do I need to call you first to see a specialist? Which specialists can I contact directly?

You don't need a referral for Health Education, work-related injury/Occupational Medicine, travel clinic, Ob/Gyn, Optometry, or Psychiatry. In addition, if you have seen another specialist within the last 13 months, you can contact them directly by phone or e-mail.

How do I get information and screening for HIV and Sexually Transmittable Diseases (STDs)?

HIV and STD Tests (For members 13 years and above)
HIV Antibody tests are available to all Kaiser Permanente members through our Health Education Department 182. Testing is scheduled by appointment by calling (408) 851-4242. Test results are delivered in personal follow up appointments. Testing for other sexually transmitted diseases (STDs) can be ordered at the same time; including Chlamydia, Gonorrhea, Syphilis and Hepatitis B and C. All test results are confidential and are recorded in the member’s medical record. Information regarding HIV and STD testing is available via a recorded telephone message at (408) 851-4253.

Standard Hours:  By appointment (408) 851-4242

Health Educator. Primary contact for HIV test procedures
Phone (408) 851-4242

Info Line recorded (408) 851-4253

Anonymous HIV-Tests are available through the Santa Clara County Health Department by calling (408) 792-3720.

How can I make an appointment for travel shots?

You can make an appointment with our Travel Clinic by calling (408) 554-9800.  Please make an appointment 6 weeks before traveling. We also recommend travelers take advantage of our Portable Electronic Medical Record. For more information, please click on the link below.

Additional References:

Can I get my Electronic Medical Record in a portable USB flash drive?

Yes. For more information, please click on the link below.

Additional References:

Does Kaiser Permanente provide physical examinations for immigration purposes?

Immigration physicals are not covered by Kaiser Permanente. Contact your district/county Department of Justice Office to obtain a list of Immigration and Naturalization Service Civil Surgeons.

When can I get Strep Throat tests done?

You can walk in to see your Primary Care Clinician for testing during regular clinic hours, Monday through Friday 8 a.m. to 5:30 p.m.  Evening, weekend and holiday clinics are held in department 260. Evening walk-in clinic hours are 6 to 7:30 p.m. Weekends and holiday walk-in hours are 9 a.m. to 5:30 p.m.

Where do I get Tuberculosis (TB) testing?

You may walk in and register at the Adult Injection Clinic Department 368 (3rd Floor) Monday through Friday 8:30 a.m. to 5:30 p.m. Tests are not given on Thursdays. If request is work related, please call Occupational Health.

Where can I get copies of my immunization records?

Your immunization records are available through which is now accessible through the Stay Connected area of My Doctor Online. You may also obtain a copy from the reception desk in Adult Injection Clinic, Homestead Medical Office Building Department 368.

Can I review my lab results online?

Yes. Most of your lab test results will be available for viewing online. Due to privacy concerns and regulations, some may not be. If you do not see the test results you are looking for online, you can call or send an e-mail message to your personal clinician.

Can I e-mail my doctor?

Yes. You can send secure, confidential e-mail to your doctor at any time during the day, night, or on weekends. We are usually able to respond to your messages within 2 business days if not away from the office. Since we may not be in the office all the time, it's best to contact our Appointment and Advice line with any urgent concerns.

Where do I bring my forms?

If you have paperwork that you are requesting or forms that need to be completed by your doctor or clinic, please bring the information to the Patient Records Department located on the 1st floor in Department 160. The department processes the following types of requests for members: Medical Records, Disability Claims and Extensions, Paid Family Leave (FMLA) Forms, and miscellaneous forms.

How do I refill my prescriptions?

You can visit any of our main or satellite pharmacies to fill prescriptions. You can refill prescriptions online through the Prescriptions section on my Web site. To refill prescriptions using our mail-order service, fill out the preprinted order forms available at our pharmacies. By telephone, you can call the number on your prescription label. If you order online, by telephone, or by mail order service, you can get most of your refills delivered to your home, postage paid, within 7 to 10 days.

Certain medications such as controlled substances and narcotic pain medications require additional processing time due to prescribing regulations. We recommend you submit requests for these medications at least two business days in advance of when you them. Walk in requests for most controlled substances and narcotic pain medications will generally not be approved unless authorized by your primary care physician.

What do I do if I'm out of refills?

If you have no refills left when you place your order, the pharmacy will contact me to request additional refills. Please allow an additional 2 business days to process your order when you have no refills remaining.

Your prescription bottle may say "0" refills, but if you called us in the past for a refill, you may have more refills available. You can check the prescription number online and see how many refills you have, or call us.

As a new member, what do I need to do?

We recommend that you start by choosing a personal physician. You can do this online or by phone.

As a new member, how do I transfer a prescription from a provider or pharmacy outside of Kaiser Permanente?

To transfer a prescription from a non-Kaiser Permanente pharmacy to any of our pharmacies, simply give your Kaiser Permanente pharmacist your prescription number and the pharmacy’s name and phone number. Your Kaiser Permanente pharmacist will handle the rest. Please allow two or more working days to process the transfer.

How do I get a account? What does it provide?

With My Health Manager on, you can e-mail your doctor, find results of most lab tests, schedule and cancel routine appointments, view future appointments, view past office visit information, refill prescriptions, view immunization records, view eligibility and benefit information, act for a child or other family member, and take advantage of health tools, resources, and information online. You must be registered to access these secure features on our Web site. To register, visit or click on the link below.

Additional References:
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