Timothy Raymond Larsen, D.O.
Clinical Cardiac Electrophysiology Physician · Chicago, IL
Timothy Raymond Larsen, D.O. is a clinical cardiac electrophysiology physician with a practice address in Chicago, Illinois, and NPI 1477845337, issued on May 11, 2011. Check the license (Illinois 036-149085, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Timothy Raymond Larsen
- Credential
- D.O.
- Primary taxonomy
- Clinical Cardiac Electrophysiology Physician 207RC0001X
- License number
- 036-149085 IL
Self-reported in NPPES; status is on the state search - Practice location
- 1725 W Harrison St Ste 1159, Chicago, IL 60612
- Phone
- (312) 942-5020
- Enumerated
- May 11, 2011
- Record last updated
- Jul 23, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190730000624); accepts Medicare assignment
- Medical or professional school
- Michigan State University College Of Osteopathic Medicine, 2011
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest clinical cardiac electrophysiology physician records → All 166 in Illinois → Look up another NPI →
Also registered at 1725 W Harrison St Ste 1159
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Quinn Capers, M.D.Cardiovascular Disease Physician1053312413
- Sneha Chebrolu, MDCardiovascular Disease Physician1174263404
- Monique Colbert, APNAcute Care Nurse Practitioner1093044471
- Fareed Moses Collado, MDInterventional Cardiology Physician1275763708
Verify Timothy Raymond Larsen 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 036-149085Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
33% more Medicare Part D claims than the average clinical cardiac electrophysiology physician in 2024
2,273 Medicare Part D claims for 504 beneficiaries, against an average of 1,710 among the 3,173 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Eliquis642 claims
- Metoprolol Succinate404 claims
- Amiodarone Hcl220 claims
- Xarelto216 claims
- Dofetilide110 claims
- Metoprolol Tartrate81 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: $8,040.39
116 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 3,167 providers of this specialty with any payment received $10,651.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
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
- Rush University Medical GroupChicago, IL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Timothy Raymond Larsen among 166 clinical cardiac electrophysiology physician records in Illinois
Timothy Raymond Larsen, D.O. is one of 166 clinical cardiac electrophysiology 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 2011, is newer than 71% of them.
- NPI issued2011 · 71% of these records are older, 25% newer
- In a Medicare fileYes · 92% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2011 · median 2003 among the 138 with a school on file
- Record last updated2019 · 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 207RC0001X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Clinical Cardiac Electrophysiology Physician providers in Illinois
There are 166 clinical cardiac electrophysiology physician records in Illinois.
All 166 in Illinois → Every provider in Chicago → Clinical Cardiac Electrophysiology Physician nationwide →
The 8 clinical cardiac electrophysiology physician records with the nearest ZIP codes
- Zachary Demertzis, DOChicago, IL 606121225534126
- Alexander Mazur, MDChicago, IL 606121710172515
- Alejandro Sanchez-Nadales, MDChicago, IL 606121619561586
- Jamario Skeete, M.D.Chicago, IL 606121356894042
- Richard Trohman, M.D.Chicago, IL 606121932128733
- Oleg Yurevich, MDChicago, IL 606121326482571
- Aamir Ahmed, MDChicago, IL 606111992297931
- Alexandru Chicos, MDChicago, IL 606111316138704
Common questions
What is Timothy Raymond Larsen, D.O.'s NPI number?
Timothy Raymond Larsen, D.O.'s National Provider Identifier (NPI) is 1477845337, issued on May 11, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Timothy Raymond Larsen, D.O. located?
The NPPES record lists a practice address at 1725 W Harrison St Ste 1159, Chicago, IL, 60612. Phone: (312) 942-5020. Providers update this record themselves, so call before visiting.
How can I verify Timothy Raymond Larsen, D.O.'s license?
NPPES lists Illinois license number 036-149085, 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 Timothy Raymond Larsen, D.O. prescribe under Medicare Part D?
In 2024, Timothy Raymond Larsen, D.O. had 2,273 Medicare Part D claims for 504 beneficiaries; the average among clinical cardiac electrophysiology physician prescribers was 1,710. 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.