NPPES file of Aug 9, 2026

James Ruska, D.O.

Hospitalist Physician · Chicago, IL

James Ruska, D.O. is a hospitalist physician with a practice address in Chicago, Illinois, and NPI 1801410022, issued on Jun 3, 2020. Check the license (Illinois 036166143, 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
1801410022
Name
James Ruska
Credential
D.O.
Primary taxonomy
Hospitalist Physician 208M00000X
License numbers
036166143 IL
125.076755 IL
125076755 IL
Self-reported in NPPES; status is on the state search
Practice location
5145 N California Ave, Chicago, IL 60625
Phone
(773) 878-8200
Enumerated
Jun 3, 2020
Record last updated
Jan 26, 2026
Medicare enrollment
Enrolled (PECOS I20230825003558); accepts Medicare assignment
Medical or professional school
Midwestern University, Chicago College Of Osteopathic Med, 2020
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 hospitalist physician records → All 1,535 in Illinois → Look up another NPI →

Also registered at 5145 N California Ave

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

  1. Linh Agtuca, DOFamily Medicine Physician1992169783
  2. Tanja Alavanja, PHARMDPharmacist1336668417
  3. Matthew Alfarano, MDEmergency Medicine Physician1538621487
  4. Sawsan Alzukaimi, MDSurgery Physician1184147688
  5. Basava Ancha, MDInternal Medicine Physician1265488647
  6. Abigail Anderson, DOInternal Medicine Physician1154263168

Verify James Ruska 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 036166143    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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24% fewer Medicare Part D claims than the average hospitalist physician in 2024

395 Medicare Part D claims for 183 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 31 claims were for opioids.

  1. James Ruska395
  2. Specialty average521

Most prescribed

  1. Cefpodoxime Proxetil37 claims
  2. Atorvastatin Calcium19 claims
  3. Hydrocodone-Acetaminophen19 claims
  4. Furosemide15 claims
  5. Entresto13 claims
  6. Pantoprazole Sodium13 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: $428.62

15 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 7,324 providers of this specialty with any payment received $494.84 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. James Ruska$428.62
  2. Specialty average$494.84

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. Endeavor Health Medical GroupEvanston, IL

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

James Ruska among 1,535 hospitalist physician records in Illinois

James Ruska, D.O. is one of 1,535 hospitalist physician records with a practice address in Illinois. 92% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 79% of them.

  • NPI issued2020 · 79% of these records are older, 14% newer
  • In a Medicare fileYes · 92% of these records are
  • In the CMS Doctors and Clinicians fileYes · 87% of these records are
  • Graduated2020 · median 2013 among the 1,339 with a school on file
  • Record last updated2026 · 32% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Hospitalist Physician providers in Illinois

There are 1,535 hospitalist physician records in Illinois.

All 1,535 in Illinois → Every provider in Chicago → Hospitalist Physician nationwide →

The 8 hospitalist physician records with the nearest ZIP codes

  1. Gregory Anderson, DOChicago, IL 606251255771358
  2. Jorge Chedrauy, MDChicago, IL 606251154617421
  3. Michael Feinzimer, MDChicago, IL 606251457455065
  4. Natalia Galkine, M.D.Chicago, IL 606251518177450
  5. Youshay Humayun, M.D.Chicago, IL 606251093010423
  6. Atika Khan, MDChicago, IL 606251174713648
  7. Asfahan Khan, D.O.Chicago, IL 606251861856247
  8. Ryan Levenhagen, DOChicago, IL 606251609289040

Common questions

What is James Ruska, D.O.'s NPI number?

James Ruska, D.O.'s National Provider Identifier (NPI) is 1801410022, issued on Jun 3, 2020. An NPI identifies a provider in billing; it is not a license.

Where is James Ruska, D.O. located?

The NPPES record lists a practice address at 5145 N California Ave, Chicago, IL, 60625. Phone: (773) 878-8200. Providers update this record themselves, so call before visiting.

How can I verify James Ruska, D.O.'s license?

NPPES lists Illinois license number 036166143, 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 James Ruska, D.O. prescribe under Medicare Part D?

In 2024, James Ruska, D.O. had 395 Medicare Part D claims for 183 beneficiaries; the average among hospitalist physician prescribers was 521. 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.