NPPES file of Aug 9, 2026

Paul Xavier Decker, M.D.

Emergency Medicine Physician · Chicago, IL

Paul Xavier Decker, M.D. is an emergency medicine physician with a practice address in Chicago, Illinois, and NPI 1427365352, issued on Sep 14, 2010. Check the license (Illinois 125056504, 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
1427365352
Name
Paul Xavier Decker
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
125056504 IL
Self-reported in NPPES; status is on the state search
Practice location
1900 W Polk St, Chicago, IL 60612
Phone
(312) 864-0062
Enumerated
Sep 14, 2010
Record last updated
Dec 15, 2021 (not updated in 5 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20140120000692); accepts Medicare assignment
Medical or professional school
Creighton University School Of Medicine, 2009
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 emergency medicine physician records → All 3,291 in Illinois → Look up another NPI →

Also registered at 1900 W Polk St

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

  1. Carmen Adams, M.D.Obstetrics & Gynecology Physician1972864338
  2. Sarah Ahmed, CRNACertified Registered Nurse Anesthetist1023395134
  3. Steven Aks, DOMedical Toxicology (Emergency Medicine) Physician1295810356
  4. Irene Aluen Metzner, M.D.Internal Medicine Physician1063698819
  5. Alejandra Argueta, PA-CPhysician Assistant1407980337
  6. Annamarie Arias, M.D.Pediatrics Physician1851731756

Verify Paul Xavier Decker 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 125056504    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

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59% more Medicare Part D claims than the average emergency medicine physician in 2024

360 Medicare Part D claims for 205 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 21 claims were for opioids.

  1. Paul Decker360
  2. Specialty average226

Most prescribed

  1. Ondansetron Odt37 claims
  2. Prednisone30 claims
  3. Amoxicillin-Clavulanate Potass21 claims
  4. Doxycycline Monohydrate17 claims
  5. Cefpodoxime Proxetil15 claims
  6. Tizanidine Hcl14 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.

Bills Medicare through one group practice

  1. Permanente Medical Group IncSanta Clara, CA

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

Paul Xavier Decker among 3,291 emergency medicine physician records in Illinois

Paul Xavier Decker, M.D. 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 2010, is newer than 47% of them.

  • NPI issued2010 · 47% of these records are older, 50% newer
  • In a Medicare fileYes · 80% of these records are
  • In the CMS Doctors and Clinicians fileYes · 57% of these records are
  • Graduated2009 · median 2012 among the 1,867 with a school on file
  • Record last updated2021 · 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).

1,310 emergency medicine physician records list a practice address in Chicago

They are 1,310 of the 63,379 NPPES records with a practice address in Chicago, and 3,291 emergency medicine physician records in Illinois.

All 3,291 in Illinois → Every provider in Chicago → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Joseph Brawka, M.D.Chicago, IL 606121174599112
  2. Christopher Caudill, MDChicago, IL 606121013993104
  3. Galeta Clayton, M.D.Chicago, IL 606121588630743
  4. Jennifer Fleming, M.D.Chicago, IL 606121912973975
  5. Jeffrey Grassle, M.D.Chicago, IL 606121205802147
  6. Marilyn Hallock, M.D.Chicago, IL 606121336110691
  7. Mumtaz Husain, M.D.Chicago, IL 606121891761953
  8. Paula Oldeg, M.D.Chicago, IL 606121568438687

Common questions

What is Paul Xavier Decker, M.D.'s NPI number?

Paul Xavier Decker, M.D.'s National Provider Identifier (NPI) is 1427365352, issued on Sep 14, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Paul Xavier Decker, M.D. located?

The NPPES record lists a practice address at 1900 W Polk St, Chicago, IL, 60612. Phone: (312) 864-0062. Providers update this record themselves, so call before visiting.

How can I verify Paul Xavier Decker, M.D.'s license?

NPPES lists Illinois license number 125056504, 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 Paul Xavier Decker, M.D. prescribe under Medicare Part D?

In 2024, Paul Xavier Decker, M.D. had 360 Medicare Part D claims for 205 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.