William H. Chamberlin, MD
Critical Care Medicine (Internal Medicine) Physician · Chicago, IL
William H. Chamberlin, MD is a critical care medicine (internal medicine) physician with a practice address in Chicago, Illinois, and NPI 1194820514, issued on Sep 13, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- William H. Chamberlin
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- Practice location
- 1740 W Taylor St, Chicago, IL 60612
- Phone
- (866) 600-2273
- Enumerated
- Sep 13, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 281 in Illinois → Look up another NPI →
Also registered at 1740 W Taylor St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify William H. Chamberlin 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
93% fewer Medicare Part D claims than the average critical care medicine (internal medicine) physician in 2024
46 Medicare Part D claims, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
William H. Chamberlin among 281 critical care medicine (internal medicine) physician records in Illinois
William H. Chamberlin, MD is one of 281 critical care medicine (internal medicine) physician records with a practice address in Illinois. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 71% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileNo · 80% of these records are
- Record last updated2007 · 22% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Illinois
There are 281 critical care medicine (internal medicine) physician records in Illinois.
All 281 in Illinois → Every provider in Chicago → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Foster Adams, D.O.Chicago, IL 606121376938977
- Cristina Bardita, MD, PHDChicago, IL 606121861809295
- Sydney Hyder, M.D.Chicago, IL 606121033645478
- Min Joo, MDChicago, IL 606121699722777
- Vassyl Lonchyna, MDChicago, IL 606121144412677
- Melvin Lopata, M.D.Chicago, IL 606121932142528
- Shubha Mathur, DOChicago, IL 606121922568377
- Tanner Norris, MDChicago, IL 606121720547797
Common questions
What is William H. Chamberlin, MD's NPI number?
William H. Chamberlin, MD's National Provider Identifier (NPI) is 1194820514, issued on Sep 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William H. Chamberlin, MD located?
The NPPES record lists a practice address at 1740 W Taylor St, Chicago, IL, 60612. Phone: (866) 600-2273. Providers update this record themselves, so call before visiting.
How can I verify William H. Chamberlin, 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.
How much does William H. Chamberlin, MD prescribe under Medicare Part D?
In 2024, William H. Chamberlin, MD had 46 Medicare Part D claims; the average among critical care medicine (internal medicine) physician prescribers was 696. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.