William Lawrence Nelson, MD
Internal Medicine Physician · Elgin, IL
William Lawrence Nelson, MD is an internal medicine physician with a practice address in Elgin, Illinois, and NPI 1326051640, issued on Aug 15, 2006. Check the license (Illinois 036091028, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- William Lawrence Nelson
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036091028 IL
Self-reported in NPPES; status is on the state search - Practice location
- 87 North Airlite, Elgin, IL 60123
- Phone
- (847) 697-5144
- Enumerated
- Aug 15, 2006
- Record last updated
- Sep 28, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (847) 697-8024
- Medicaid ID
- 36091028 IL
- Medicare enrollment
- Enrolled (PECOS I20101203000844); accepts Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Verify William Lawrence Nelson 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 036091028Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2% more Medicare Part D claims than the average internal medicine physician in 2024
3,236 Medicare Part D claims for 185 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 145 claims were for opioids.
Most prescribed
- Atorvastatin Calcium166 claims
- Amlodipine Besylate108 claims
- Levothyroxine Sodium97 claims
- Metformin Hcl95 claims
- Simvastatin89 claims
- Alprazolam87 claims
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 Lawrence Nelson among 7,238 internal medicine physician records in Illinois
William Lawrence Nelson, 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. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 61% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated1995 · median 2003 among the 3,580 with a school on file
- Record last updated2012 · 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).
62 internal medicine physician records list a practice address in Elgin
They are 62 of the 2,268 NPPES records with a practice address in Elgin, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Elgin → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Richard Baley, M.D.Elgin, IL 601231184693327
- Jawed Ehsan, MDElgin, IL 601231114901501
- John Fiedler, M.D.Elgin, IL 601231487623716
- Dennis Flynn, M.D.Elgin, IL 601231295704435
- Jeffrey Garb, M.D.Elgin, IL 601231023063237
- Anandita Gephart, M.D.Elgin, IL 601231790709343
- Michael Hernandez, M.D.Elgin, IL 601231972501096
- Ronald Hirsch, M.D.Elgin, IL 601231467450585
Common questions
What is William Lawrence Nelson, MD's NPI number?
William Lawrence Nelson, MD's National Provider Identifier (NPI) is 1326051640, issued on Aug 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William Lawrence Nelson, MD located?
The NPPES record lists a practice address at 87 North Airlite, Elgin, IL, 60123. Phone: (847) 697-5144. Providers update this record themselves, so call before visiting.
How can I verify William Lawrence Nelson, MD's license?
NPPES lists Illinois license number 036091028, 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 William Lawrence Nelson, MD prescribe under Medicare Part D?
In 2024, William Lawrence Nelson, MD had 3,236 Medicare Part D claims for 185 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.