Ryuji Spencer Arimoto
Anesthesiology Physician · Chicago, IL
Ryuji Spencer Arimoto is an anesthesiology physician with a practice address in Chicago, Illinois, and NPI 1023878303, issued on Mar 21, 2024. Check the license (Illinois 125083774, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Ryuji Spencer Arimoto
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 125083774 IL
Self-reported in NPPES; status is on the state search - Practice location
- 251 E Huron St, Chicago, IL 60611
- Phone
- (312) 926-2000
- Enumerated
- Mar 21, 2024
- Record last updated
- Jun 24, 2024
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 2,575 in Illinois → Look up another NPI →
Also registered at 251 E Huron St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brian Abarbanel, MDPhysical Medicine & Rehabilitation Physician1124600291
- Mohamed Abazeed, MD, PHDRadiation Oncology Physician1205096609
- Allison AbbottCertified Registered Nurse Anesthetist1720446594
- Kathryn AbbottPsychiatry Physician1295537561
- Ramez Abdalla, M.B., B. CHNeuroradiology Physician1407410392
- Dena Abdelhameed, PHARM.D.Nuclear Pharmacist1073954301
Verify Ryuji Spencer Arimoto in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional Regulation
Search for license 125083774Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
97% fewer Medicare Part D claims than the average anesthesiology physician in 2024
12 Medicare Part D claims, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Ryuji Spencer Arimoto among 2,575 anesthesiology physician records in Illinois
Ryuji Spencer Arimoto is one of 2,575 anesthesiology physician records with a practice address in Illinois. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2024, is newer than 93% of them.
- NPI issued2024 · 93% of these records are older, 4% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2024 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,113 anesthesiology physician records list a practice address in Chicago
They are 1,113 of the 63,379 NPPES records with a practice address in Chicago, and 2,575 anesthesiology physician records in Illinois.
All 2,575 in Illinois → Every provider in Chicago → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Shireen Ahmad, MDChicago, IL 606111932197134
- Michael Ault, MDChicago, IL 606111851371165
- Alina Brodskaia, MDChicago, IL 606111588623219
- Eugene Butry, MDChicago, IL 606111902865348
- Sara Childers, MDChicago, IL 606111538121207
- Andre De Wolf, MDChicago, IL 606111194789404
- Alexander Deleon, MDChicago, IL 606111902860497
- Robert Gay, M.D.Chicago, IL 606111427057298
Common questions
What is Ryuji Spencer Arimoto's NPI number?
Ryuji Spencer Arimoto's National Provider Identifier (NPI) is 1023878303, issued on Mar 21, 2024. An NPI identifies a provider in billing; it is not a license.
Where is Ryuji Spencer Arimoto located?
The NPPES record lists a practice address at 251 E Huron St, Chicago, IL, 60611. Phone: (312) 926-2000. Providers update this record themselves, so call before visiting.
How can I verify Ryuji Spencer Arimoto's license?
NPPES lists Illinois license number 125083774, 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 Ryuji Spencer Arimoto prescribe under Medicare Part D?
In 2024, Ryuji Spencer Arimoto had 12 Medicare Part D claims; the average among anesthesiology physician prescribers was 402. 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.
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.