KATHERINE RIORDAN MD
NPI 1225923329
Neurological Surgery in Chicago, IL

Active since June 10, 2025PECOS Enrolled
1725 W HARRISON ST STE 855, CHICAGO, IL 60612(312) 942-6644 Get Directions Write a Review

NPPES record last updated: July 28, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Katherine Riordan Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KATHERINE RIORDAN MD (NPI 1225923329) is an individual neurological surgery provider in Chicago, Illinois, licensed in Illinois (125086087) and active in the NPI registry since June 2025. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1225923329
Entity TypeIndividualFemale
Primary Taxonomy207T00000X
Provider Legal NameKATHERINE RIORDANCredential: MD
Location Address1725 W HARRISON ST STE 855Chicago, IL 60612-5113
Mailing Address1725 W Harrison St Ste 855Chicago, IL 60612-5113
Sole ProprietorNo
Enumeration DateJune 10, 2025
Last NPPES UpdateJuly 28, 2025
NPPES CertifiedJuly 28, 2025
NPI 1225923329 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207T00000X
License Licensed in IL · 125086087
Definition
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.
1725 W HARRISON ST STE 855, Chicago, IL 60612

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare (PECOS)

Katherine Riordan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60612 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$138.86 typical visit price
range $60.08 – $183.39
Typical copayment $34.71 (range $15.02 – $45.84)
Most-billed visit code 99204
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Neurological Surgery
1725 W HARRISON ST STE 855
CHICAGO, IL 60612
Neurological Surgery
1725 W HARRISON ST STE 855
CHICAGO, IL 60612
Neurological Surgery
1725 W HARRISON ST STE 855
CHICAGO, IL 60612
Neurological Surgery
1725 W HARRISON ST STE 855
CHICAGO, IL 60612
Neurological Surgery
1725 W HARRISON ST STE 855
CHICAGO, IL 60612
Neurological Surgery
1725 W HARRISON ST STE 855
CHICAGO, IL 60612
Neurological Surgery
1725 W HARRISON ST STE 855
CHICAGO, IL 60612
Neurological Surgery
1725 W HARRISON ST STE 855
CHICAGO, IL 60612

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Katherine Riordan's NPI number?

The NPI number for Katherine Riordan is 1225923329. It was assigned to this individual provider in the NPPES registry on June 10, 2025.

Where is Katherine Riordan located?

Katherine Riordan practices at 1725 W Harrison St Ste 855, Chicago, IL 60612. The listed phone number is (312) 942-6644.

What is Katherine Riordan's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Katherine Riordan enrolled in Medicare?

Yes. Katherine Riordan is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Katherine Riordan was last updated on July 28, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.