Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Alexander Jonathan Petts

Pathology - Anatomic Pathology β€’ Chicago, IL

Active NPI 1457079097 Individual Practitioner Male Practitioner
Practice location in NPPES

303 E Chicago Ave
Chicago, IL 606114296

Call 3125038144 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

303 E Chicago Ave

Chicago, IL 606114296

Telephone 3125038144
Organization at the Same NPPES Address or Phone
Northwestern University Facility NPI 1235993031

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

Industry payments (Open Payments)

No Open Payments records are listed for this clinician for 2019–2025.

Guide: How to read an Open Payments record

NPI first issued

2022

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.

Medicare assignment not listed

CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.

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

Compared with the same specialty in Chicago and Illinois

46 active clinicians are listed under Pathology - Anatomic Pathology with a practice address in Chicago, IL (86 in Illinois).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Chicago

0% of these 46 clinicians have the CMS telehealth indicator.

58.7% of these 46 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo Β· Report an error.

Specialties & License Numbers Reported to NPPES

Self-certified to NPPES: 2026-06-09
Pathology - Anatomic Pathology Primary Specialty

NUCC Taxonomy Code: 207ZP0101X

License # reported to NPPES IL 125.087514

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

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

Clinicians Sharing This Practice Address or Phone

Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.

13 listed
Dr. Ayah Ali , MD

Pathology - Anatomic Pathology & Clinical Pathology

NPI 1255818316

Doctor of Medicine (M.D.)

Dr. Brian Bolton , MD

Pathology - Anatomic Pathology & Clinical Pathology

NPI 1073761128

Doctor of Medicine (M.D.)

Dr. Daniel Brat , MD, PhD

Pathology - Neuropathology

NPI 1982639001

Doctor of Medicine (M.D.), Doctor of Philosophy (Ph.D.)

Dr. Rudolph Castellani , MD

Pathology - Neuropathology

NPI 1932138815

Doctor of Medicine (M.D.)

Dr. Suzanne Iwaz , MD

Pathology - Anatomic Pathology

NPI 1982067807

Doctor of Medicine (M.D.)

Dr. Lucy Jager , MD

Pathology - Anatomic Pathology & Clinical Pathology

NPI 1659734838

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

9 Historical Events
πŸ“
Updated Practice Location June 09, 2026

Registered at 303 E CHICAGO AVE, CHICAGO, IL 606114296 (Tel: 3125038144)

πŸ“
Updated Business Mailing Address June 09, 2026

Registered at 77 W HURON ST APT 613, CHICAGO, IL 606543888 (Tel: 4053085213)

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) June 09, 2026

Pathology (license number reported to NPPES: IL 125.087514)

βœ…
NPI Profile Active August 19, 2022

NPI status registered as active in NPPES database

πŸ“
Practice Location (Initial Record) August 19, 2022

Registered at 800 STANTON L YOUNG BLVD, OKLAHOMA CITY, OK 731045018 (Tel: 4052712316)

πŸ“
Business Mailing Address (Initial Record) August 19, 2022

Registered at 11733 SW 17TH ST, YUKON, OK 730994566 (Tel: 4056085213)

πŸ‘€
Provider Name / Credentials (Initial Record) August 19, 2022

Recorded as ALEXANDER PETTS

πŸŽ“
Medical Taxonomy / Specialty Registered (Primary Specialty) August 19, 2022

Student in an Organized Health Care Education/Training Program

🟒
Initial NPI Registration & Enumeration August 19, 2022

First registered as active Individual Practitioner in NPPES Database.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1457079097
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: August 19, 2022
Last Update: June 09, 2026
Sole Proprietor: No

Other Pathology - Anatomic Pathology Specialists in Chicago

All Pathology - Anatomic Pathology Specialists in Chicago

Mailing Address

77 W Huron St Apt 613

Chicago, IL 606543888

Phone: 4053085213

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.