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DIEGO MATEO CORNEJO GONZALEZ MD
NPI 1043999725
Internal Medicine in Chicago, IL

Active since July 11, 2023PECOS Enrolled
1901 W HARRISON ST, CHICAGO, IL 60612(312) 864-6000 Get Directions Write a Review

NPPES record last updated: April 29, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 29, 2026, Jul 11, 2023 (2 updates tracked since 2023).

About Diego Mateo Cornejo Gonzalez Md NPPES

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

DIEGO MATEO CORNEJO GONZALEZ MD (NPI 1043999725) is an individual internal medicine provider in Chicago, Illinois, licensed in Illinois (125082439) and active in the NPI registry since July 2023. He is enrolled in Medicare PECOS and maintains a secondary practice location in Chicago.

NPPES Registry Identity

NPI1043999725
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDIEGO MATEO CORNEJO GONZALEZCredential: MD
Location Address1901 W HARRISON STChicago, IL 60612-3714
Mailing Address832 S Claremont Ave Unit 2rChicago, IL 60612-4238 · (312) 284-7695
Phone(312) 864-6000
Sole ProprietorNo
Enumeration DateJuly 11, 2023
Last NPPES UpdateApril 29, 20262 updates tracked since enumeration
NPPES CertifiedApril 29, 2026
✔ NPI 1043999725 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in IL · 125082439
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Endocrinology, Diabetes & MetabolismTaxonomy 207RE0101X · License 036.178732 (IL)
1901 W HARRISON ST, Chicago, IL 60612
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Secondary Practice Location 1

Location 11620 W Harrison StChicago, IL 60612-3801 · Phone (312) 942-5000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Diego Mateo Cornejo Gonzalez 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
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
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 20

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

JOHANNA WEFES-POTTER
Emergency Medicine
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (847) 843-2000
ARON BERHANU GUDETTA MD
Internal Medicine
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 864-6000
DR. LIGAYA VILLAFRANCA MARASIGAN M.D.
Obstetrics & Gynecology (Gynecology)
1901 W HARRISON ST
CHICAG, IL 60612
Cook County (312) 864-5901
TIN TIN THOMAS M.D.
Internal Medicine
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 864-6000
COOK COUNTY
Pharmacy (Clinic Pharmacy)
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 864-6189
HELEN ELIZABETH STRAUS MD
Emergency Medicine
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (312) 864-0060
MR. GLEN DERRICK TRAMMELL PA-C
Physician Assistant
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (773) 869-7488
JOHN H STROGER, JR. HOSPITAL OF COOK COUNTY
General Acute Care Hospital
1901 W HARRISON ST
CHICAGO, IL 60612
Cook County (773) 319-2085

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 Diego Mateo Cornejo Gonzalez's NPI number?

The NPI number for Diego Mateo Cornejo Gonzalez is 1043999725. It was assigned to this individual provider in the NPPES registry on July 11, 2023.

Where is Diego Mateo Cornejo Gonzalez located?

Diego Mateo Cornejo Gonzalez practices at 1901 W Harrison St, Chicago, IL 60612. The listed phone number is (312) 864-6000.

What is Diego Mateo Cornejo Gonzalez's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Diego Mateo Cornejo Gonzalez enrolled in Medicare?

Yes. Diego Mateo Cornejo Gonzalez is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Diego Mateo Cornejo Gonzalez was last updated on April 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.