Randall Earl Williams, MD
Cardiovascular Disease Physician · Barrington, IL
Randall Earl Williams, MD is a cardiovascular disease physician with a practice address in Barrington, Illinois, and NPI 1720030646, issued on May 17, 2006. Check the license (Illinois 036091021, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Randall Earl Williams
- Credential
- MD
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License number
- 036091021 IL
Self-reported in NPPES; status is on the state search - Practice location
- 27750 W Highway 22, Barrington, IL 60010
- Phone
- (847) 829-1600
- Enumerated
- May 17, 2006
- Record last updated
- Jul 18, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 036091021 IL
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,073 in Illinois → Look up another NPI →
Also registered at 27750 W Highway 22
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Thomas Leskovac, MDCardiovascular Disease Physician1407809338
- Minhaj Musa, M.D.Internal Medicine Physician1467863589
Verify Randall Earl Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 036091021Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Randall Earl Williams among 1,073 cardiovascular disease physician records in Illinois
Randall Earl Williams, MD is one of 1,073 cardiovascular disease physician records with a practice address in Illinois. 85% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 50% newer
- In a Medicare fileNo · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2008 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Illinois
There are 1,073 cardiovascular disease physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 1,073 in Illinois → Every provider in Barrington → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Abas Amiry, M.D.Barrington, IL 600101982613006
- Michael Fortsas, MDBarrington, IL 600101497764518
- Thomas Leskovac, MDBarrington, IL 600101407809338
- Taha MohiuddinBarrington, IL 600101346090628
- Douglas Tomasian, MDBarrington, IL 600101922187756
- Anshul Aggarwal, MDElk Grove Village, IL 600071023285145
- Salvador Barrocas, M.D.Elk Grove Villiage, IL 600071801836085
- John Furiasse, M.D.Elk Grove Village, IL 600071063466167
Common questions
What is Randall Earl Williams, MD's NPI number?
Randall Earl Williams, MD's National Provider Identifier (NPI) is 1720030646, issued on May 17, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Randall Earl Williams, MD located?
The NPPES record lists a practice address at 27750 W Highway 22, Barrington, IL, 60010. Phone: (847) 829-1600. Providers update this record themselves, so call before visiting.
How can I verify Randall Earl Williams, MD's license?
NPPES lists Illinois license number 036091021, as entered by the provider. 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.