NPPES file of Aug 9, 2026

Colleen Margaret Masters, M.S.N.

Acute Care Nurse Practitioner · Chicago, IL

Colleen Margaret Masters, M.S.N. is an acute care nurse practitioner with a practice address in Chicago, Illinois, and NPI 1619306362, issued on Nov 4, 2013. Check the license (Illinois 209.010761, as entered in NPPES) with the Illinois board that licenses this profession; 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
1619306362
Name
Colleen Margaret Masters
Credential
M.S.N.
Primary taxonomy
Acute Care Nurse Practitioner 363LA2100X
License numbers
209.010761 IL
041369961 IL
Self-reported in NPPES; status is on the state search
Practice location
500 S Paulina St, Chicago, IL 60612
Phone
(312) 563-4514
Enumerated
Nov 4, 2013
Record last updated
Jun 20, 2018 (not updated in 8 years: call before relying on the address or phone)
Fax
(312) 563-2857
Medicare enrollment
Enrolled (PECOS I20131209000074); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
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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Also registered at 500 S Paulina St

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

  1. Sarah Anderson, APNAcute Care Nurse Practitioner1982254090
  2. Gaurav Marwaha, M.D.Radiation Oncology Physician1669798062
  3. Soumyajit Roy, MBBSRadiation Oncology Physician1174085096
  4. Ken Tatebe, MDRadiation Oncology Physician1942620745
  5. Dian Wang, MDRadiation Oncology Physician1841246030

Verify Colleen Margaret Masters in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 209.010761    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
Find the Illinois license search

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79% fewer Medicare Part D claims than the average acute care nurse practitioner in 2024

123 Medicare Part D claims for 60 beneficiaries, against an average of 594 among the 13,133 providers of this specialty who prescribed in Part D. 28 claims were for opioids.

  1. Colleen Masters123
  2. Specialty average594

Most prescribed

  1. Oxycodone Hcl13 claims
  2. Hydrocodone-Acetaminophen11 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. Rush University Medical GroupChicago, IL

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

Acute Care Nurse Practitioner providers in Illinois

There are 639 acute care nurse practitioner records in Illinois.

All 639 in Illinois → Every provider in Chicago →

Other acute care nurse practitioner records in Illinois

  1. Jessica Acosta, APRNChicago, IL1679169015
  2. Cathy Adamson, N.P.Elmhurst, IL1407906126
  3. Kelly Adcock, BSN MSN APNPeoria, IL1386707354
  4. Adeola Adeoye, APNChicago, IL1598103459
  5. Toluwalase AdeyemiChicago, IL1346137635
  6. Maria Agopian, NPElk Grove Village, IL1235407735
  7. Michael Ahart, APNWestmont, IL1346750767
  8. Sydney Ain, RN, AGACNPChicago, IL1043062268
  9. Alison Aldag, AGACNP-BCPeoria, IL1497531800
  10. Anthony AllenChicago, IL1750262234

Common questions

What is Colleen Margaret Masters, M.S.N.'s NPI number?

Colleen Margaret Masters, M.S.N.'s National Provider Identifier (NPI) is 1619306362, issued on Nov 4, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Colleen Margaret Masters, M.S.N. located?

The NPPES record lists a practice address at 500 S Paulina St, Chicago, IL, 60612. Phone: (312) 563-4514. Providers update this record themselves, so call before visiting.

How can I verify Colleen Margaret Masters, M.S.N.'s license?

NPPES lists Illinois license number 209.010761, as entered by the provider. Search the Illinois board that licenses this profession; the NPPES record confirms identity only.

How much does Colleen Margaret Masters, M.S.N. prescribe under Medicare Part D?

In 2024, Colleen Margaret Masters, M.S.N. had 123 Medicare Part D claims for 60 beneficiaries; the average among acute care nurse practitioner prescribers was 594. 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.