Kidney health
Protecting your kidney function and slowing disease progression, from early warning signs through advanced stages.
Nephrology & Internal Medicine · Madera, CA
Expert kidney care,
rooted in the Central Valley.
Our fellowship-trained nephrologists care for Central Valley neighbors — helping your kidneys stay as healthy as they can, from our Madera clinic and the region's major hospitals.
Referred by your doctor? Call us — we likely already have your paperwork.
What we can help with
Care for every stage of kidney health
Living well on dialysis
Guiding you through every step of dialysis — choosing the right type, preparing access, and ongoing physician oversight.
Blood pressure & heart health
Getting hard-to-control high blood pressure under control, and managing the fluid and mineral balance your kidneys regulate.
Hospital care
If you're hospitalized with a sudden kidney problem, our physicians consult directly with your hospital care team.
What we can help with
Noticing any of these? We can help.
These are the most common reasons people come to see us. If any sound familiar, you're in exactly the right place.
- Blood pressure that won't behave
- Protein or blood in your urine
- Swelling in your legs or face
- Kidney function flagged on labs
- Chronic kidney disease
- Diabetes affecting your kidneys
- Sodium or potassium out of balance
- A sudden kidney problem in hospital
- Preparing for dialysis
Not sure where you fit? That's okay — call (559) 661-1965 and we'll figure it out together.
How it works
Getting kidney care shouldn't feel complicated.
Four simple steps from "my doctor mentioned a nephrologist" to a care plan you actually understand.
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Get referred — or just call
Most patients come to us from their primary care doctor or the hospital. Already referred? We likely have your paperwork. Not yet? Call us and we'll walk you through what your plan needs.
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We check your coverage
Our staff verifies your insurance before your visit — we participate in most major plans, including Medicare and Medi-Cal — so there are no billing surprises.
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Meet your nephrologist
Your first visit is a real conversation. We review your labs together, explain what the numbers actually mean, and answer every question you bring.
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Leave with a plan that fits
You go home with a clear, written care plan — and a team that coordinates with your other doctors, your pharmacy, and the hospital if you ever need it.
Meet your care team
Doctors your doctor trusts
Primary care physicians and hospitals across the Central Valley send their patients to Dr. Masood and Dr. Siddiqui.
Dr. Sheikh Mohammad Masood, MD
President & Nephrologist
Dr. Sheikh Mohammad Masood, MD, is the founding president of Kidney Specialist Inc. With specialized fellowship training in Nephrology from the LSU Health Sciences Center, Dr. Masood provides compassionate, comprehensive care for patients with complex renal diseases, hypertension, and dialysis needs throughout Madera and the Central Valley.
Credentials, training & hospital privileges
Dr. Mohammed Muhibbulla Siddiqui, MD
Nephrologist & Clinical Specialist
Dr. Mohammed M. Siddiqui, MD, brings deep clinical expertise in nephrology, acute renal care, and hospital medicine to Kidney Specialist Inc. Active in medical research, Dr. Siddiqui specializes in advanced chronic kidney disease management, acute renal injury, and resistant hypertension.
Credentials, training & hospital privileges
If you're ever hospitalized, we're already there.
Our physicians hold privileges and provide bedside nephrology consultations at the region's major hospitals:
- Saint Agnes Medical Center · Fresno, CA
- Community Regional Medical Center · Fresno, CA
- Clovis Community Medical Center · Clovis, CA
- Madera Community Hospital · Madera, CA
Close to home
Patients come to us from all over the valley — Chowchilla, Madera Ranchos, Oakhurst, Coarsegold, Kerman, Firebaugh, Mendota, Fresno and Clovis.
We accept most major insurance plans — yours is probably one of them.
Good questions
Wondering about your first visit?
You're not the only one. Here are the questions patients ask us most — and there are more answers on our patients page.
See all questions →Do I need a referral to be seen?
Many insurance plans require a referral from your primary care physician before seeing a specialist. If your doctor referred you, we've likely already received the paperwork by fax. If you're unsure, call our office at (559) 661-1965 and our staff will check your plan's requirements with you.
Does anyone in the office speak Spanish?
Yes. Our entire staff speaks Spanish, so you and your family will always have someone to explain things in Spanish — when you call, when you arrive, during your appointment, and afterward. The physicians see patients in English, and a staff member is always there to translate and make sure you understand your care plan, your medications, and your results. The doctors also speak Urdu, Hindi, and Punjabi.
What should I bring to my first appointment?
Please bring a valid photo ID, your insurance card(s), a complete list of your current medications with dosages (including over-the-counter drugs and supplements), any referral paperwork from your doctor, and copies of recent lab results or kidney imaging if you have them. Don't worry if you're missing something — our staff can request records from your other doctors.
Visit us
Our Madera office
Call to schedule an appointment or transfer records — a real person answers, and they're happy to help.
Address 451 E Almond Ave, Suite 101
Madera, CA 93637 Open in Google Maps →
Madera, CA 93637 Open in Google Maps →
Phone (559) 661-1965
Fax (referrals & records) (559) 661-1952
Our whole staff speaks Spanish
You and your family will always have someone to explain things in Spanish — before, during, and after your visit.
Office hours
Monday – Friday 8:30 AM – 5:00 PM
Saturday – Sunday Closed
Evenings and weekends
The office is closed, but the same number still reaches a real person, who will take your message. Our staff will call you back on the next business day. If something can't wait until then, call 911 or go to the nearest emergency room.