Dr. Ryan Marcus Naylor , MD, PhD
Neurological Surgery β’ Chicago, IL
5841 S Maryland Ave
Chicago, IL 606371443
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Ryan Naylor is listed in NPPES under Neurological Surgery.
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NPI assigned on March 30, 2018; this date does not establish years in practice.
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Published CMS data list 20 Medicare Part D prescriptions, including refills, in 2021.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2021. Published rows only; this is not a quality measure.
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Published Part D records, 2021:
- Oxycodone Hcl β 20 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2021. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table Β· Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 46 in 2019 to 20 in 2021.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2019β2021.
Practice Location & Contact Primary Location
5841 S Maryland Ave
Chicago, IL 606371443
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Los Angeles, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 2 distinct group names: The University Of Chicago Medical Center; University Of Chicago. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Mayo Medical School
2018
What Public CMS Data Show
Neurological Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
30-day fills
20 standardized 30-day fills in 2021
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$72 in 2021
The total cost of these prescriptions in 2021, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers β by Provider and Drug, 2021.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $137.75 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
Years since graduation
8 years (graduated 2018)
CMS Doctors and Clinicians data list 2018 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2018
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, βDoes your provider accept Medicare as full payment?β
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Naylor has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Naylor as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Chicago and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Naylor are from 2021.
172 active clinicians are listed under Neurological Surgery with a practice address in Chicago, IL (375 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Chicago
20.9% of these 172 clinicians have the CMS telehealth indicator.
44.2% of these 172 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 57% from 46 in 2019 to 20 in 2021.
- 2019: 46
- 2020: 39
- 2021: 20
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30-day fills
30-day fills decreased 57% from 46 in 2019 to 20 in 2021.
- 2019: 46
- 2020: 39
- 2021: 20
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Part D drug cost
Part D drug cost went from $197 in 2019 to $72 in 2021.
- 2019: $197
- 2020: $177
- 2021: $72
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $118.24 in 2022 to $137.75 in 2025.
- 2022: $118.24
- 2023: $65.99
- 2024: $2,748.73
- 2025: $137.75
Sources: CMS Medicare Part D Prescribers (2021), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo Β· Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 β December 31, 2025): fewer than 11 records totaling $137.75.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Penumbra, Inc. |
Food and Beverage
Cash or cash equivalent
|
Artemis | General | $137.75 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2021.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 20 | 87 | $71.93 | 20 |
Source: CMS Part D by Provider and Drug, 2021; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2025-11-14NUCC Taxonomy Code: 207T00000X
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
NUCC Taxonomy Code: 207T00000X
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
NUCC Taxonomy Code: 207T00000X
A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - NEUROSURGERY
I20260327000732
IN
8527315613
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
The University Of Chicago Medical Center
5841 S Maryland Ave, Chicago, IL 606371443
Phone: 7737021000
University Of Chicago
5841 S Maryland Ave, Chicago, IL 606371443
Phone: 8888240200
University Of Chicago
10855 Virginia St, Crown Point, IN 463070210
Phone: 8888240200
Secondary Practice Locations
1520 San Pablo St Ste 3800
Los Angeles, CA 900335328
Phone: 3234425720
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Family
Obstetrics & Gynecology
Family Medicine
Radiology - Diagnostic Radiology
Internal Medicine - Cardiovascular Disease
Internal Medicine
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 5841 S MARYLAND AVE, CHICAGO, IL 606371443 (Tel: 8888240200)
Registered at 150 HARVESTER DR STE 300, BURR RIDGE, IL 605275965
Registered at 1520 SAN PABLO ST STE 3800, LOS ANGELES, CA 900335328 (Tel: 3234425720)
Registered at PO BOX 31309, LOS ANGELES, CA 900310309 (Tel: 3234425720)
Neurological Surgery (license number reported to NPPES: MN 29184)
Neurological Surgery (license number reported to NPPES: MN 65896)
Registered at 200 1ST ST SW, ROCHESTER, MN 55905 (Tel: 5072842511)
Neurological Surgery (license number reported to NPPES: MN 29184)
NPI status registered as active in NPPES database
Registered at 200 1ST ST SW, ROCHESTER, MN 559050001 (Tel: 5072842511)
Registered at 200 1ST ST SW, ROCHESTER, MN 559050001 (Tel: 5072842511)
Recorded as RYAN NAYLOR, M.D., PH.D.
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Neurological Surgery Specialists in Chicago
- Dr. Matthew Koch, MD
- Dr. Lorenzo Munoz, MD
- Dr. John O'toole, MD
- Paramita Das
- Dr. Nader Dahdaleh, MD
- Dr. Leslie Schaffer, MD
Mailing Address
150 Harvester Dr Ste 300
Burr Ridge, IL 605275965