NPPES file of Aug 9, 2026

Kathleen Wren Phelan, M.D.

Hematology (Internal Medicine) Physician · Chicago, IL

Kathleen Wren Phelan, M.D. is a hematology (internal medicine) physician with a practice address in Chicago, Illinois, and NPI 1932363447, issued on Jul 14, 2008. Check the license (Illinois 036121454, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1932363447
Name
Kathleen Wren Phelan
Credential
M.D.
Primary taxonomy
Hematology (Internal Medicine) Physician 207RH0000X
License number
036121454 IL
Self-reported in NPPES; status is on the state search
Practice location
1520 W Harrison St, Chicago, IL 60607
Phone
(312) 942-5904
Enumerated
Jul 14, 2008
Record last updated
Oct 10, 2025
Medicare enrollment
Enrolled (PECOS I20120926000530); accepts Medicare assignment
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 hematology (internal medicine) physician records → All 47 in Illinois → Look up another NPI →

Also registered at 1520 W Harrison St

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

  1. Muhammed Alikhan, MDGastroenterology Physician1518427251
  2. Haris Arshad, DOPhysical Medicine & Rehabilitation Physician1114541380
  3. Zain AsharyNeurology Physician1306343595
  4. Fotios Asimakopoulos, MDHematology & Oncology Physician1518134923
  5. Adewale Bakare, MDNeurological Surgery Physician1679065569
  6. Bristi BasuPhysician Assistant1336955343

Verify Kathleen Wren Phelan 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 036121454    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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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).

Kathleen Wren Phelan among 47 hematology (internal medicine) physician records in Illinois

Kathleen Wren Phelan, M.D. is one of 47 hematology (internal medicine) physician records with a practice address in Illinois. 85% 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 53% of them.

  • NPI issued2008 · 53% of these records are older, 34% newer
  • In a Medicare fileYes · 85% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated2005 · median 2003 among the 31 with a school on file
  • Record last updated2025 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology (Internal Medicine) Physician providers in Illinois

There are 47 hematology (internal medicine) physician records in Illinois.

All 47 in Illinois → Every provider in Chicago → Hematology (Internal Medicine) Physician nationwide →

The 8 hematology (internal medicine) physician records with the nearest ZIP codes

  1. Nadia Khan, MDChicago, IL 606071659531499
  2. Rebecca Steuer, MDChicago, IL 606071912535238
  3. Helen Gue, MDChicago, IL 606091326151796
  4. Olga Frankfurt, MDChicago, IL 606111962492611
  5. David Green, MDChicago, IL 606111053340364
  6. Hau Kwaan, MDChicago, IL 606111164537825
  7. Jayesh Mehta, MDChicago, IL 606111790718617
  8. Seema Singhal, MDChicago, IL 606111013940501

Common questions

What is Kathleen Wren Phelan, M.D.'s NPI number?

Kathleen Wren Phelan, M.D.'s National Provider Identifier (NPI) is 1932363447, issued on Jul 14, 2008. An NPI identifies a provider in billing; it is not a license.

Where is Kathleen Wren Phelan, M.D. located?

The NPPES record lists a practice address at 1520 W Harrison St, Chicago, IL, 60607. Phone: (312) 942-5904. Providers update this record themselves, so call before visiting.

How can I verify Kathleen Wren Phelan, M.D.'s license?

NPPES lists Illinois license number 036121454, 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.

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.