David Alan Vermylen, M.D.
Internal Medicine Physician · Chicago, IL
David Alan Vermylen, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1467773986, issued on Jun 18, 2010. Check the license (Illinois 036132542, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- David Alan Vermylen
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036132542 IL
Self-reported in NPPES; status is on the state search - Practice location
- 200 S Michigan Ave, Chicago, IL 60604
- Phone
- (312) 922-3815
- Enumerated
- Jun 18, 2010
- Record last updated
- Jul 14, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (312) 922-7449
- Medicare enrollment
- Enrolled (PECOS I20140808001994); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2010
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Also registered at 200 S Michigan Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify David Alan Vermylen 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 036132542Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,936 Medicare Part D claims for 151 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Rosuvastatin Calcium164 claims
- Atorvastatin Calcium111 claims
- Amlodipine Besylate85 claims
- Levothyroxine Sodium74 claims
- Zolpidem Tartrate49 claims
- Eliquis47 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.
Industry payments in 2024: $69.28
3 payments; by number, the most common kind was food and beverage; the largest payer was Exact Sciences Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
David Alan Vermylen among 7,238 internal medicine physician records in Illinois
David Alan Vermylen, M.D. 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 2010, is newer than 51% of them.
- NPI issued2010 · 51% of these records are older, 47% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2010 · median 2003 among the 3,580 with a school on file
- Record last updated2015 · 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.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Patricia Bush, MDChicago, IL 606041649482464
- Amy Chen, MDChicago, IL 606041154663532
- Angelo Costas, M.D.Chicago, IL 606041104874791
- Steven Deangeles, MDChicago, IL 606041467438630
- Ami Desai, M.D.Chicago, IL 606041710097795
- Greg Ewert, M.D.Chicago, IL 606041376591974
- Louis Hiotis, M.D.Chicago, IL 606041710980339
- Elaine Leboff-Ries, M.D.Chicago, IL 606041013965771
Common questions
What is David Alan Vermylen, M.D.'s NPI number?
David Alan Vermylen, M.D.'s National Provider Identifier (NPI) is 1467773986, issued on Jun 18, 2010. An NPI identifies a provider in billing; it is not a license.
Where is David Alan Vermylen, M.D. located?
The NPPES record lists a practice address at 200 S Michigan Ave, Chicago, IL, 60604. Phone: (312) 922-3815. Providers update this record themselves, so call before visiting.
How can I verify David Alan Vermylen, M.D.'s license?
NPPES lists Illinois license number 036132542, 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 David Alan Vermylen, M.D. prescribe under Medicare Part D?
In 2024, David Alan Vermylen, M.D. had 1,936 Medicare Part D claims for 151 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.