Dr. John C. Maynard, MD
- Medicare services, 2024
- 2,030
- Medicare patients, 2024
- 581
- Part D claims, 2024
- 1,004
- MIPS score, 2024
- 95
- Hospital affiliations
- 4
- Practice address
- 612 Roxbury Rd, Rockford, IL 61107
- Practice phone
- Call (815) 397-0713
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Roxbury Dialysis Center
Rockford, Illinois
Find Dr. Maynard's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. John C. Maynard is a nephrologist in Rockford, Illinois
Dr. Maynard practices at Roxbury Dialysis Center in Rockford, Illinois.
Dr. Maynard's NPI, 1730180878, was assigned on August 10, 2005. Dr. Maynard graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1978. Dr. Maynard holds Illinois license 036066422.
- NPI
- 1730180878NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3779493861
- NPI enumeration date
- August 10, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (815) 397-0713
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John C. Maynard practices at Roxbury Dialysis Center in Rockford, Illinois
Dr. Maynard's primary practice is Roxbury Dialysis Center, at 612 Roxbury Rd, Rockford, IL 61107 in Winnebago County. The practice phone is (815) 397-0713.
- Roxbury Dialysis Center612 Roxbury Rd, Rockford, IL 61107 · Winnebago CountyPhone(815) 397-0713
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John C. Maynard is affiliated with 10 sites of care and 1 medical group
Dr. Maynard's primary practice is Roxbury Dialysis Center in Rockford, Illinois. Dr. Maynard is also affiliated with UW Health SwedishAmerican Hospital. The medical group on file is Rockford Nephrology Associates. Dmand AI also links Dr. Maynard to 3 more hospitals, 4 dialysis centers and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John C. Maynard's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maynard practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Roxbury Dialysis Center | Available with a free account |
| +9 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John C. Maynard is one of 534 nephrologists in Illinois
Nephrology is Dr. Maynard's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Maynard is licensed in Illinois.
Specialties and state licenses
- Nephrology, IllinoisPrimary
Nephrologists near Dr. Maynard
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John C. Maynard billed Medicare for 2,030 services in 2024
CMS data shows 2,030 Medicare services from Dr. Maynard across 16 procedure codes in 2024, for 581 Medicare patients. Medicare paid $141,143 for them.
Dr. Maynard's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 9912024: 1,50452%
- Other services
- 2023: 02024: 353
- Tests and treatments
- 2023: 2822024: 10762%
- Lab and pathology
- 2023: 132024: 27108%
- Imaging
- 2023: 252024: 25No change
- Surgery
- 2023: 442024: 1468%
Where Dr. Maynard's Medicare services took place, 2024
- In an office1,54476%
- In a facility48624%
Dr. Maynard compared with the Illinois median for nephrologists, 2024
- Dr. Maynard
- Illinois median
- Medicare services
- 2,030vs 1,28458% above
- Medicare patients
- 581vs 35763% above
- Part D claims
- 879vs 57852% above
Medians across 526 nephrologists in Illinois with Dmand AI profiles that report each measure.
Dr. Maynard's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Maynard?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Maynard and other nephrologists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John C. Maynard treated 581 Medicare patients in 2024, average age 75
CMS counts 581 Medicare patients who saw Dr. Maynard in 2024. The largest group is 75 to 84, with 214 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 24% are also on Medicaid. Their average risk score is 3.66, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Maynard's median patient age at 71, with 51% women.
Dr. Maynard's Medicare patients by age, 2024
Dr. Maynard's Medicare patients by sex, 2024
- Women29451%
- Men28749%
Chronic conditions among Dr. Maynard's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes59%
- Arthritis55%
- Heart failure51%
- Ischemic heart disease50%
- Mood disorders41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Maynard's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women51%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John C. Maynard wrote 1,004 Medicare Part D claims in 2024
In 2024, Dr. Maynard wrote 1,004 Medicare Part D claims for 232 patients. 96% of them were for generic drugs. CMS names the drug for 879 of them, across 18 drugs with 11 or more claims each, at $43,496 in total drug cost. In 2023, CMS named 1,081 claims across 19 drugs.
Dr. Maynard's Part D claims by kind of drug, 2024
- Generic962 claims96%
- Brand-name42 claims4%
Dr. Maynard's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Maynard's Part D claims, 2024
- Antibiotics2%17 of 1,004 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,0812024: 87919%
Drugs named by CMS: 18 in 2024, 19 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. John C. Maynard scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Maynard for performance year 2024, reported as part of a group. Dr. Maynard accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Maynard's MIPS scores, performance year 2024
- 95of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 78of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John C. Maynard received $1,977 in industry payments from 2018 to 2023
CMS Open Payments shows 20 general payments to Dr. Maynard from 3 drug and device companies from 2018 to 2023. Travel and lodging make up the largest share, 51% of the total. Baxter Healthcare paid the most, $1,662.
General payments to Dr. Maynard by program year, 2018 to 2023
General payments to Dr. Maynard by kind, 2018 to 2023
- Travel and lodging$1,01651%
- Food and beverage$95448%
- Gifts$70%
Companies that paid Dr. Maynard the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John C. Maynard graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Maynard graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1978.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John C. Maynard's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. John C. Maynard
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John C. Maynard's NPI number?
Dr. John C. Maynard's NPI number is 1730180878. It was assigned on August 10, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John C. Maynard?
Dr. John C. Maynard is a nephrologist in Rockford, Illinois. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. John C. Maynard practice?
Dr. Maynard practices at 612 Roxbury Rd, Rockford, IL 61107. Dr. Maynard's primary practice is Roxbury Dialysis Center in Rockford, Illinois. Dmand AI also links Dr. Maynard to 3 hospitals, 4 dialysis centers and 1 group practice or clinic.
What is Dr. John C. Maynard's office phone number?
The practice phone on file for Dr. Maynard is (815) 397-0713.
What is Dr. John C. Maynard's medical license number?
Dr. Maynard holds Illinois license 036066422.
Which hospitals is Dr. John C. Maynard affiliated with?
Dr. Maynard is affiliated with UW Health SwedishAmerican Hospital. Dmand AI links Dr. Maynard to 3 more hospitals.
What medical group is Dr. John C. Maynard part of?
Dr. Maynard is linked to Rockford Nephrology Associates.
Does Dr. John C. Maynard accept Medicare?
Yes. CMS data shows Dr. Maynard billed Medicare for 2,030 services in 2024, and Dr. Maynard accepts Medicare assignment.
What is Dr. John C. Maynard's MIPS score?
Dr. Maynard's MIPS final score for performance year 2024 is 95 out of 100, reported as part of a group.
How many Medicare patients does Dr. John C. Maynard see?
CMS counts 581 Medicare patients who saw Dr. Maynard in 2024, with an average age of 75.
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What services does Dr. John C. Maynard bill to Medicare?
In 2024, Dr. Maynard's most billed Medicare services were care management and other visits (99490), medicare service (G2211) and hospital inpatient care (99232).
Where did Dr. John C. Maynard go to medical school?
Dr. Maynard graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 1978.
What drugs does Dr. John C. Maynard prescribe most?
In 2024 Medicare Part D data, Dr. Maynard's most prescribed drugs by claims were Lisinopril, Terazosin HCl and Furosemide.
Has Dr. John C. Maynard received payments from drug or device companies?
CMS Open Payments shows $1,977 in general payments to Dr. Maynard from 3 companies from 2018 to 2023. The largest total came from Baxter Healthcare.
How long has Dr. John C. Maynard been practicing?
Dr. Maynard graduated from medical school in 1978, 48 years ago.
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