Earl Charles Williams, MD
Emergency Medicine Physician · Crystal Lake, IL
Earl Charles Williams, MD is an emergency medicine physician with a practice address in Crystal Lake, Illinois, and NPI 1912561077, issued on Apr 24, 2019. Check the license (Illinois 036167126, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Earl Charles Williams
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 036167126 IL
125-076961 IL
Self-reported in NPPES; status is on the state search - Practice location
- 875 S. Route 31, Crystal Lake, IL 60014
- Phone
- (815) 356-7494
- Enumerated
- Apr 24, 2019
- Record last updated
- Oct 20, 2023
- Medicare enrollment
- Enrolled (PECOS I20250228000637); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →
Also registered at 875 S. Route 31
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Jessica SikoraSpeech-Language Pathologist1487332292
Verify Earl Charles 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 036167126Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% fewer Medicare Part D claims than the average emergency medicine physician in 2024
81 Medicare Part D claims for 64 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
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.
The MIPS final score for 2023 (Medicare payment program): 97.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 3 group practices
- Emergency Coverage LLCDanville, VA
- Emergency Services Midwest SCBelleville, IL
- Mercy Health System CorporationHarvard, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Earl Charles Williams among 3,291 emergency medicine physician records in Illinois
Earl Charles Williams, MD is one of 3,291 emergency medicine physician records with a practice address in Illinois. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 74% of them.
- NPI issued2019 · 74% of these records are older, 22% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2020 · median 2012 among the 1,867 with a school on file
- Record last updated2023 · 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 207P00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Illinois
There are 3,291 emergency medicine physician records in Illinois.
All 3,291 in Illinois → Every provider in Crystal Lake → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- John Gaskill, M.D.Crystal Lake, IL 600141316058043
- Jason Bradt, M.D.Deerfield, IL 600151407147671
- Anthony Horwitz, MDBannockburn, IL 600151194991398
- Howard Izenson, M.D.Deerfield, IL 600151760522460
- William Lauth, M.D., M.M.M.Riverwoods, IL 600151932148145
- Deborah Weber, MDRiverwoods, IL 600151437393477
- Maciej Padowski, D.O.Des Plaines, IL 600161508282377
- Todd Bannen, M.D.Barrington, IL 600101952414682
Common questions
What is Earl Charles Williams, MD's NPI number?
Earl Charles Williams, MD's National Provider Identifier (NPI) is 1912561077, issued on Apr 24, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Earl Charles Williams, MD located?
The NPPES record lists a practice address at 875 S. Route 31, Crystal Lake, IL, 60014. Phone: (815) 356-7494. Providers update this record themselves, so call before visiting.
How can I verify Earl Charles Williams, MD's license?
NPPES lists Illinois license number 036167126, 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.
How much does Earl Charles Williams, MD prescribe under Medicare Part D?
In 2024, Earl Charles Williams, MD had 81 Medicare Part D claims for 64 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Earl Charles Williams, MD's MIPS final score?
The 2023 MIPS final score is 97.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.