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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

WILLIAM A JOHNSON MD
NPI 1255381307
Internal Medicine in Chicago, IL

Active since May 11, 2006
1701 W MONTEREY AVE, SUITE 1, CHICAGO, IL 60643(773) 233-5850 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About William A Johnson Md NPPES

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

WILLIAM A JOHNSON MD (NPI 1255381307) is an individual internal medicine provider in Chicago, Illinois and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1255381307
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameWILLIAM A JOHNSONCredential: MD
Location Address1701 W MONTEREY AVE, SUITE 1Chicago, IL 60643-4257
Mailing Address3601 W 183rd StHazel Crest, IL 60429-2409 · (708) 957-7623 · Fax (708) 957-7948
Phone(773) 233-5850
Sole ProprietorNo
Enumeration DateMay 11, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1255381307 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
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.
1701 W MONTEREY AVE, Chicago, IL 60643
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Other Providers at the Same Location NPPES 17

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

VANESSA HOWARD FNP-BC
Nurse Practitioner (Family)
1701 W MONTEREY AVE, SUITE 4
CHICAGO, IL 60643
Cook County (773) 298-9800
DR. GREGORY BRIAN WINSTEAD MD, MPH
Family Medicine
1701 W MONTEREY AVE
CHICAGO, IL 60643
Cook County (773) 233-5850
JOHNSON HEALTHCARE PROVIDERS LTD
Internal Medicine
1701 W MONTEREY AVE
CHICAGO, IL 60643
Cook County (773) 233-5800
DR. JOHN BLAIR MATTES DDS
Dentist (General Practice)
1701 W MONTEREY AVE
CHICAGO, IL 60643
Cook County (773) 445-9880
VALERIE C WALKER M.D.
Internal Medicine
1701 W MONTEREY AVE, SUITE 1
CHICAGO, IL 60643
Cook County (773) 233-5850
CHRISTIAN COMMUNITY HEALTH CENTER
Clinic/Center (Community Health)
1701 W MONTEREY AVE
CHICAGO, IL 60643
Cook County (773) 233-5850
DIVINE INTERVENTIONS AN HKN LLC
Radiology (Vascular & Interventional Radiology)
1701 W MONTEREY AVE
CHICAGO, IL 60643
Cook County (708) 576-9542
VASCULAR ACCESS CENTERS OF ILLINOIS AT MORGAN PARK, LLC
Clinic/Center (Ambulatory Surgical)
1701 W MONTEREY AVE
CHICAGO, IL 60643
Cook County (773) 366-8035

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 William Johnson's NPI number?

The NPI number for William Johnson is 1255381307. It was assigned to this individual provider in the NPPES registry on May 11, 2006.

Where is William Johnson located?

William Johnson practices at 1701 W Monterey Ave Suite 1, Chicago, IL 60643. The listed phone number is (773) 233-5850.

What is William Johnson's specialty?

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

When was this NPI record last updated?

The NPPES record for William Johnson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 days 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.