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How To Prepare for a C3G or IC-MPGN Specialist Visit

Medically reviewed by Sarika Chaudhari, M.D., Ph.D.
Written by Sarah Winfrey
Posted on July 16, 2026

Seeing a specialist for a rare kidney disease like complement 3 glomerulopathy (C3G) or immune complex membranoproliferative glomerulonephritis (IC-MPGN) can feel overwhelming — especially if it’s your first visit. Knowing what to bring, ask, and expect can help you prepare for the appointment and talk with your doctor more easily.

What To Bring

Before your appointment, contact the specialist’s office to confirm which records they need. For C3G or IC-MPGN, they’ll typically want to review:

  • Lab results related to kidney function
  • Kidney biopsy reports
  • Genetic testing reports
  • Complement testing reports
  • Imaging reports
  • A current medication list, including over-the-counter (OTC) medicines and supplements
  • Notes from other doctors you’ve seen

If you haven’t had a test they’re asking for, let the office know — they may be able to order it before your visit. Also ask whether the records should be sent ahead of time or brought to the appointment. You may need to sign a release form so your current provider can send them.

On the day of your appointment, also bring:

  • Your insurance cards
  • Any home blood pressure logs or symptom notes you’ve been keeping
  • Updated records of any medication changes or new procedures since you last contacted the office

What To Ask

You may not get through every question in one visit, so write down your priorities ahead of time. Before the appointment, ask what exams to expect and whether you should wear certain clothing. You can also ask whether you’ll need to provide a urine sample.

During the appointment, consider asking your specialist:

  • What type of kidney disease do I have, and what does it mean for my health?
  • How much kidney damage is there, and how quickly is it progressing?
  • What tests do I need now or before my next visit?
  • What treatments are available, and what side effects should I know about?
  • What can I do to protect my kidneys, including through diet or lifestyle changes?
  • What symptoms mean I should call you right away?
  • Who should I contact if I have questions between visits?
  • Should anyone in my family consider genetic testing?

At the start of the appointment, ask your doctor whether they prefer questions as they come up or all at the end — and if it’s the latter, keep a notepad handy so nothing gets lost.

What To Expect

Your specialist will likely start by reviewing your test results and medical history to confirm your diagnosis, clarify what type of rare kidney disease you have, and determine whether more testing is needed. If you haven’t had genetic testing, a kidney biopsy, or complement system testing, they may explain why these are useful and order them.

From there, the conversation will typically cover:

  • How your condition is affecting your kidneys and what you’ll need to monitor
  • Treatment options — Since there’s no cure for C3G or IC-MPGN, treatment focuses on slowing kidney damage and managing related problems such as high blood pressure, proteinuria (protein in the urine), and high cholesterol
  • Lifestyle changes that may help protect kidney function, including diet

After your visit, follow up with the office if you have new or worsening symptoms — your care plan may need to be adjusted as your condition changes.

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On MyKidneyDiseaseTeam, people share their experiences with kidney disease, get advice, and find support from others who understand.

What do you do to prepare before visiting a rare kidney disease specialist? Let others know in the comments below.

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