NPPES file of Aug 9, 2026

Brian Medernach, BRIAN MEDERNACH

Internal Medicine Physician · Lombard, IL

Brian Medernach, BRIAN MEDERNACH is an internal medicine physician with a practice address in Lombard, Illinois, and NPI 1801050539, issued on Jul 11, 2008. Check the license (Illinois 036.126376, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1801050539
Name
Brian Medernach
Credential
BRIAN MEDERNACH
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
036.126376 IL
Self-reported in NPPES; status is on the state search
Practice location
1S072 Luther Ave, Lombard, IL 60148
Phone
(630) 247-8877
Enumerated
Jul 11, 2008
Record last updated
Apr 8, 2026
Medicare enrollment
Enrolled (PECOS I20111215000532); accepts Medicare assignment
Medical or professional school
Loyola University Of Chicago, Stritch School Of Medicine, 2007
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →

Also registered at 1S072 Luther Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ellen Dekold, APNNurse Practitioner1316571151
  2. Shefali Seth, FNPFamily Nurse Practitioner1265942023
  3. Cristina Sira, NURSE PRACTITIONERFamily Nurse Practitioner1518580620
  4. Aleksandra Vargas, FNP-BCFamily Nurse Practitioner1154086767

Verify Brian Medernach in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
    Search for license 036.126376    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Illinois license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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79% fewer Medicare Part D claims than the average internal medicine physician in 2024

673 Medicare Part D claims for 154 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.

  1. Brian Medernach673
  2. Specialty average3,176

Most prescribed

  1. Ertapenem68 claims
  2. Amoxicillin-Clavulanate Potass61 claims
  3. Meropenem54 claims
  4. Sulfamethoxazole-Trimethoprim53 claims
  5. Doxycycline Hyclate52 claims
  6. Vancomycin Hcl50 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: $56.20

2 payments; by number, the most common kind was food and beverage; the largest payer was Organogenesis Inc. 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.

  1. Brian Medernach$56.20
  2. Specialty average$1,303.06

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Infectious Diseases Associates PCElk Grove Village, IL

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Brian Medernach among 7,238 internal medicine physician records in Illinois

Brian Medernach, BRIAN MEDERNACH 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 2008, is newer than 45% of them.

  • NPI issued2008 · 45% of these records are older, 51% newer
  • In a Medicare fileYes · 73% of these records are
  • In the CMS Doctors and Clinicians fileYes · 50% of these records are
  • Graduated2007 · median 2003 among the 3,580 with a school on file
  • Record last updated2026 · 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).

38 internal medicine physician records list a practice address in Lombard

They are 38 of the 1,347 NPPES records with a practice address in Lombard, and 7,238 internal medicine physician records in Illinois.

All 7,238 in Illinois → Every provider in Lombard → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Kris Alloju, MDLombard, IL 601481760478671
  2. Julia Andreoni, M.D.Lombard, IL 601481184601148
  3. Carl Barsanti, M.D.Lombard, IL 601481861450637
  4. Ojash Bhagwakar, MDLombard, IL 601481740255298
  5. David Dungan, MDLombard, IL 601481558336057
  6. Catherine Grotelueschen, M.D.Lombard, IL 601481346208428
  7. Jacques Jentel, M.D.Lombard, IL 601481336115583
  8. Kathleen Kicsak, MDLombard, IL 601481235105396

Common questions

What is Brian Medernach, BRIAN MEDERNACH's NPI number?

Brian Medernach, BRIAN MEDERNACH's National Provider Identifier (NPI) is 1801050539, issued on Jul 11, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Brian Medernach, BRIAN MEDERNACH located?

The NPPES record lists a practice address at 1S072 Luther Ave, Lombard, IL, 60148. Phone: (630) 247-8877. Providers update this record themselves, so call before visiting.

How can I verify Brian Medernach, BRIAN MEDERNACH's license?

NPPES lists Illinois license number 036.126376, 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 Brian Medernach, BRIAN MEDERNACH prescribe under Medicare Part D?

In 2024, Brian Medernach, BRIAN MEDERNACH had 673 Medicare Part D claims for 154 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.