NPPES file of Aug 9, 2026

Julia Brewster Ashenhurst, M.D.

Hematology & Oncology Physician · Chicago, IL

Julia Brewster Ashenhurst, M.D. is a hematology & oncology physician with a practice address in Chicago, Illinois, and NPI 1336225358, issued on Oct 31, 2006. Check the license on the Illinois Department of Financial and Professional Regulation; the federal record below is the public data PlainDoctor holds for this provider.

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

NPPES recordNPPES file of Aug 9, 2026
1336225358
Name
Julia Brewster Ashenhurst
Credential
M.D.
Primary taxonomy
Hematology & Oncology Physician 207RH0003X
Practice location
5841 S Maryland Ave, Chicago, IL 60637
Phone
(773) 702-4400
Enumerated
Oct 31, 2006
Record last updated
Feb 12, 2008 (not updated in 18 years: call before relying on the address or phone)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest hematology & oncology physician records → All 666 in Illinois → Look up another NPI →

Also registered at 5841 S Maryland Ave

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

  1. Ma. Theresa Abaring, CRNACertified Registered Nurse Anesthetist1962647586
  2. Rouzbeh AbbasgholizadehRetina Specialist (Ophthalmology) Physician1881510030
  3. Jehad Abdalla, MDSleep Medicine (Internal Medicine) Physician1053898684
  4. Sara Abdelaziz, MDEndocrinology, Diabetes & Metabolism Physician1598258089
  5. Noor Abdelrahman, PA-CPhysician Assistant1851012413
  6. Unknown Abdul Hanan, MDBlood Banking & Transfusion Medicine Physician1750022240

Verify Julia Brewster Ashenhurst in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck 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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Julia Brewster Ashenhurst among 666 hematology & oncology physician records in Illinois

Julia Brewster Ashenhurst, M.D. is one of 666 hematology & oncology physician records with a practice address in Illinois. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 15% of them.

  • NPI issued2006 · 15% of these records are older, 57% newer
  • In a Medicare fileNo · 84% of these records are
  • In the CMS Doctors and Clinicians fileNo · 69% of these records are
  • Record last updated2008 · 49% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hematology & Oncology Physician providers in Illinois

There are 666 hematology & oncology physician records in Illinois. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 666 in Illinois → Every provider in Chicago → Hematology & Oncology Physician nationwide →

The 8 hematology & oncology physician records with the nearest ZIP codes

  1. Christopher DaughertyChicago, IL 606371063574523
  2. Gini FlemingChicago, IL 606371407918964
  3. Thomas GajewskiChicago, IL 606371194888610
  4. Philip HoffmanChicago, IL 606371700949229
  5. Richard LarsonChicago, IL 606371114089661
  6. Rita NandaChicago, IL 606371568524015
  7. Sunil NarulaChicago, IL 606371861428583
  8. Olatoyosi OdenikeChicago, IL 606371194887646

Common questions

What is Julia Brewster Ashenhurst, M.D.'s NPI number?

Julia Brewster Ashenhurst, M.D.'s National Provider Identifier (NPI) is 1336225358, issued on Oct 31, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Julia Brewster Ashenhurst, M.D. located?

The NPPES record lists a practice address at 5841 S Maryland Ave, Chicago, IL, 60637. Phone: (773) 702-4400. Providers update this record themselves, so call before visiting.

How can I verify Julia Brewster Ashenhurst, M.D.'s license?

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. 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.