
41 Years of Experience
Accepting patients
Affiliated with a Castle Connolly Top Hospital
Who is Dr. Maynard, Nephrologist in Rockford, IL?
Dr. John Maynard, MD is a Nephrologist, who primarily practices in Rockford, IL with 2 additional practice locations. He has been practicing for over 41 years and is board certified. Dr. Maynard graduated from University of Illinois College of Medicine and completed his residency at Henry Ford Hosp, Nephrology; Henry Ford Hosp, Internal Medicine. Dr. Maynard is fluent in English and Spanish, and is currently seeing new patients. Dr. Maynard’s practice accepts Medicaid, Medicare and other major insurance plans. To book an appointment or to confirm insurance options, please call Dr. Maynard’s office at (815) 227-8300.
Where did Dr. Maynard go to medical school and complete their residency?
Residency: Henry Ford Hosp, Nephrology; Henry Ford Hosp, Internal Medicine | Henry Ford Hospital Program
Medical School: University Of Il Coll Of Med- Chicago Il | University of Illinois College of Medicine
Is Dr. Maynard board certified as a Nephrologist?
Yes, Dr. John Maynard, MD is board certified by the American Board of Internal Medicine
What languages does Dr. Maynard speak?
Dr. Maynard and their clinical team can communicate with patients in the following languages:
English
Spanish
What conditions does a Nephrologist like Dr. Maynard typically treat?
As a Nephrologist, Dr. Maynard 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. Maynard. 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.
Also known as:
- End-Stage Kidney Disease
- Chronic Kidney Disease from High Blood Pressure
- Chronic Kidney Disease Stage 3b
- Chronic Kidney Disease, Stage 4 (Severe)
- Chronic Kidney Disease, Stage 3a
- Kidney Failure
- Chronic Kidney Disease (CKD)
- Helping Your Child Adapt to Life with Chronic Kidney Disease
- Chronic Kidney Disease
- High Blood Pressure
- ESRD
- End-Stage Renal Failure
- Hypertensive Chronic Kidney Disease
- High Blood Pressure Kidney Disease
- Hypertension-Related Kidney Disease
- CKD Stage 3b
- Moderate Chronic Kidney Disease
- CKD Stage 4
- Severe Chronic Kidney Disease
- CKD Stage 3a
ICD-10 Codes:
- N186: End stage renal disease
- I129: Hypertensive chronic kidney disease with stage 1 through stage 4 chronic kidney disease, or unspecified chronic kidney disease
- N1832: Chronic kidney disease, stage 3b
- N184: Chronic kidney disease, stage 4 (severe)
- N1831: Chronic kidney disease, stage 3a
Also known as:
- Kidney Scarring
- Kidney Disease
- Renal Sclerosis
- Hardening of the Kidneys
ICD-10 Codes:
- N269: Renal sclerosis, unspecified
Also known as:
- Type 2 Diabetes with Chronic Kidney Disease
- Diabetes Type 2
- Diabetic Kidney Problems
- Type 2 diabetes
- Diabetic Chronic Kidney Disease
- Long-term Kidney Failure from Type 2 Diabetes
- Type 2 Diabetes End-Stage Renal Disease
ICD-10 Codes:
- E1122: Type 2 diabetes mellitus with diabetic chronic kidney disease
What procedures does a Nephrologist like Dr. Maynard typically perform?
As a Nephrologist, Dr. Maynard performs a variety of medical procedures. This procedure information is derived from anonymized insurance claims and highlights the medical procedures most commonly performed by Dr. Maynard. 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.
Also known as:
- Dialysis Circuit Angioplasty with Balloon
- Dialysis Fistula Angioplasty
- Dialysis Graft Angioplasty
- Peripheral Dialysis Segment Angioplasty
CPT Codes:
- 36902: Introduction of needle(s) and/or catheter(s), dialysis circuit, with diagnostic angiography of the dialysis circuit, including all direct puncture(s) and catheter placement(s), injection(s) of contrast, all necessary imaging from the arterial anastomosis and adjacent artery through entire venous outflow including the inferior or superior vena cava, fluoroscopic guidance, radiological supervision and interpretation and image documentation and report; with transluminal balloon angioplasty, peripheral dialysis segment, including all imaging and radiological supervision and interpretation necessary to perform the angioplasty
Does Dr. Maynard accept my insurance?
Dr. Maynard accepts most major insurance plans. Important: Please call our office at (815) 227-8300 before your appointment to verify that your specific plan and network are accepted.
What insurance plans does Dr. Maynard accept in Rockford, IL?
Dr. Maynard in Rockford, IL accepts plans from many carriers. While this list is updated regularly, it is not a guarantee of coverage.
Top Insurances
Centene
Centene Corporation
Cigna Group
CVS Health (formerly Aetna)
Federal government of the United States
Humana
Medicare
Other Provider Networks
State of Illinois
UnitedHealth Group
View All Insurances
Where is Dr. Maynard's office located?
What hospitals are Dr. Maynard affiliated with?
Castle Connolly Top Hospital
This doctor is affiliated with a Castle Connolly Top Hospital.
Dr. Maynard has admitting privileges at the following hospitals:
Uw Health Swedishamerican Hospital,Rockford, IL
Ranked Colon Surgery

Uw Health Swedishamerican Hospital,Rockford, IL
Ranked Colon Surgery
Osf Healthcare Saint Anthony Medical Center,Rockford, IL
Ranked Cancer Surgery

Ranked Mastectomy

Osf Healthcare Saint Anthony Medical Center,Rockford, IL
Ranked Cancer Surgery
Ranked Mastectomy
Froedtert Hospital,Milwaukee, WI
Ranked Urologic Surgery

Ranked in 8 Procedures

Froedtert Hospital,Milwaukee, WI
Ranked Urologic Surgery
Ranked in 8 Procedures
Javon Bea Hospital – Riverside,Rockford, IL
Ranked ObGyn Surgery

Ranked C-section surgery

Javon Bea Hospital – Riverside,Rockford, IL
Ranked ObGyn Surgery
Ranked C-section surgery
Northwestern Medicine Kishwaukee Hospital,DeKalb, IL
Ranked General Surgery

Ranked Hernia Repair Surgery

Northwestern Medicine Kishwaukee Hospital,DeKalb, IL
Ranked General Surgery
Ranked Hernia Repair Surgery
Osf Saint Katharine Medical Center,Dixon, IL
Osf Saint Katharine Medical Center,Dixon, IL
What is Dr. Maynard's NPI number?A National Provider Identifier (NPI) is a unique ID number that identifies doctors and healthcare providers nationwide.
Dr. Maynard's National Provider Identifier (NPI) number is 1730180878.
What common questions do patients ask about Dr. Maynard?
Here are answers to patients Frequently Asked Questions (FAQ’s) about Dr. Maynard
What is Dr. John Maynard's specialty?
Dr. Maynard is a Nephrologist near Rockford, IL.
What does a Nephrologist do?
An internist who manages disorders related to the kidneys, including high blood pressure, fluid and mineral balance, and dialysis for waste removal when kidney function is impaired. This specialist also collaborates with surgeons regarding kidney transplantation.
Is Dr. John Maynard affiliated with a ranked Castle Connolly Top Hospital?
Yes, Dr. Maynard is affiliated with Uw Health Swedishamerican Hospital, Osf Healthcare Saint Anthony Medical Center, Froedtert Hospital, Javon Bea Hospital – Riverside, Northwestern Medicine Kishwaukee Hospital 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 a Nephrologist?: Guides for symptoms, conditions, and treatments
Understand your symptoms and know when it’s time to see a Nephrologist. 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 Dr. John Maynard accepting new patients in Rockford, IL?
Yes, Dr. John Maynard is accepting new patients at this time.
Does Dr. John Maynard offer online booking?
Please contact Dr. Maynard's office at (815) 227-8300 for information about online booking, telehealth, or to schedule an appointment.
How can I make an appointment with Dr. John Maynard?
Please contact Dr. Maynard's office at (815) 227-8300 to schedule an appointment.
Where is Dr. Maynard's office located?
Dr. Maynard's offices are located in Rockford, IL, Morrison, IL, and Beloit, WI.
Which board certifications does Dr. John Maynard have?
Dr. John Maynard is certified by the American Board of Internal Medicine.
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