Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Ryan Marcus Naylor , MD, PhD

Neurological Surgery β€’ Chicago, IL

Active NPI 1215433206 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

5841 S Maryland Ave
Chicago, IL 606371443

Call 8888240200 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

5841 S Maryland Ave

Chicago, IL 606371443

Telephone 8888240200
Organization at the Same NPPES Address or Phone
University Of Chicago Facility NPI 1821048786

Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.

Other Listings in Public Data

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

Medical School

Mayo Medical School

Graduation Year

2018

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.

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 – 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.

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.

Guide: How to read an Open Payments record

Years since graduation

8 years (graduated 2018)

CMS Doctors and Clinicians data list 2018 as the year this clinician finished professional 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.

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, β€œDoes your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

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.

Guide: How Medicare covers telehealth

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.

Guide: What Medicare enrollment (PECOS) means

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.

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.

Guide: What ordering and referring status means

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.

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

Open Payments Β· Program Year 2025
Disclosure Year:

Program year 2025 (payments made January 1 – 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.

CMS Part D Β· Data Year 2021
Prescription Year:
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: 2025-11-14
Neurological Surgery Primary Specialty

NUCC Taxonomy Code: 207T00000X

License # reported to NPPES IL 036177244

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.

Neurological Surgery

NUCC Taxonomy Code: 207T00000X

License # reported to NPPES MN 29184

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.

Neurological Surgery

NUCC Taxonomy Code: 207T00000X

License # reported to NPPES CA A200643

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Illinois Department of Financial and Professional Regulation.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - NEUROSURGERY

Medicare Enrollment ID

I20260327000732

Enrollment State Jurisdiction

IN

PECOS Control ID

8527315613

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

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.

37 listed
Calvin Adatsi

Nurse Practitioner - Family

NPI 1033767082
Ayman Al-Hendy

Obstetrics & Gynecology

NPI 1023184637
Stephen Bennett

Family Medicine

NPI 1013978766
Paul Chang

Radiology - Diagnostic Radiology

NPI 1023080983
Michael Davidson

Internal Medicine - Cardiovascular Disease

NPI 1023033321
Alexandra Dumitrescu

Internal Medicine

NPI 1003078049

Career & Practice History Timeline

Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status

14 Historical Events
πŸ“
Updated Practice Location November 14, 2025

Registered at 5841 S MARYLAND AVE, CHICAGO, IL 606371443 (Tel: 8888240200)

πŸ“
Updated Business Mailing Address November 14, 2025

Registered at 150 HARVESTER DR STE 300, BURR RIDGE, IL 605275965

πŸ“
Updated Practice Location July 24, 2025

Registered at 1520 SAN PABLO ST STE 3800, LOS ANGELES, CA 900335328 (Tel: 3234425720)

πŸ“
Updated Business Mailing Address July 24, 2025

Registered at PO BOX 31309, LOS ANGELES, CA 900310309 (Tel: 3234425720)

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 24, 2025

Neurological Surgery (license number reported to NPPES: MN 29184)

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 24, 2019

Neurological Surgery (license number reported to NPPES: MN 65896)

πŸ“
Updated Practice Location July 03, 2018

Registered at 200 1ST ST SW, ROCHESTER, MN 55905 (Tel: 5072842511)

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) July 03, 2018

Neurological Surgery (license number reported to NPPES: MN 29184)

βœ…
NPI Profile Active March 30, 2018

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) March 30, 2018

Registered at 200 1ST ST SW, ROCHESTER, MN 559050001 (Tel: 5072842511)

πŸ“
Business Mailing Address (Initial Record) March 30, 2018

Registered at 200 1ST ST SW, ROCHESTER, MN 559050001 (Tel: 5072842511)

πŸ‘€
Provider Name / Credentials (Initial Record) March 30, 2018

Recorded as RYAN NAYLOR, M.D., PH.D.

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) March 30, 2018

Student in an Organized Health Care Education/Training Program

🟒
Initial NPI Registration & Enumeration March 30, 2018

First registered as active Individual Practitioner in NPPES Database.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1215433206
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: March 30, 2018
Last Update: November 14, 2025
Sole Proprietor: No

Other Neurological Surgery Specialists in Chicago

All Neurological Surgery Specialists in Chicago

Mailing Address

150 Harvester Dr Ste 300

Burr Ridge, IL 605275965

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.