William A. Johnson, MD
Internal Medicine Physician · Chicago, IL
William A. Johnson, MD is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1255381307, issued on May 11, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William A. Johnson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- Practice location
- 1701 W Monterey Ave, Chicago, IL 60643
- Phone
- (773) 233-5850
- Enumerated
- May 11, 2006
- Record last updated
- Jul 13, 2026
- Entity
- Type 1 · individual
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Verify William A. Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William A. Johnson among 7,238 internal medicine physician records in Illinois
William A. Johnson, MD is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileNo · 73% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2026 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Corazon Benig, M.D.Chicago, IL 606431760437172
- Robia Byas, M.D.Chicago, IL 606431093748758
- Cedric Coleman, MDChicago, IL 606431104809755
- Magnus Edosomwan, MDChicago, IL 606431215959176
- Thelma Evans, M.D.Chicago, IL 606431184659336
- Necholas Ghannam, MDChicago, IL 606431962480541
- Katherine Granberry, M.D.Chicago, IL 606431881612471
- Richard Harris, M.D.Chicago, IL 606431942249008
Common questions
What is William A. Johnson, MD's NPI number?
William A. Johnson, MD's National Provider Identifier (NPI) is 1255381307, issued on May 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William A. Johnson, MD located?
The NPPES record lists a practice address at 1701 W Monterey Ave, Chicago, IL, 60643. Phone: (773) 233-5850. Providers update this record themselves, so call before visiting.
How can I verify William A. Johnson, MD's license?
Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.