Louis Hiotis, M.D.
Internal Medicine Physician · Chicago, IL
Louis Hiotis, M.D. is an internal medicine physician with a practice address in Chicago, Illinois, and NPI 1710980339, issued on May 27, 2005. Check the license (Illinois 036-108161, as entered in NPPES) on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Louis Hiotis
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 036-108161 IL
Self-reported in NPPES; status is on the state search - Practice location
- 200 S. Michigan Avenue, Chicago, IL 60604
- Phone
- (312) 922-3815
- Enumerated
- May 27, 2005
- Record last updated
- Mar 18, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (312) 922-7449
- Medicaid ID
- 036108161 IL
- Medicare enrollment
- Enrolled (PECOS I20041014001079); accepts Medicare assignment
- Medical or professional school
- Loyola University Of Chicago, Stritch School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 7,238 in Illinois → Look up another NPI →
Verify Louis Hiotis 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 036-108161Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,274 Medicare Part D claims for 170 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 44 claims were for opioids.
Most prescribed
- Atorvastatin Calcium187 claims
- Rosuvastatin Calcium155 claims
- Amlodipine Besylate94 claims
- Losartan Potassium90 claims
- Metoprolol Succinate70 claims
- Pantoprazole Sodium62 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: $446.77
20 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Louis Hiotis among 7,238 internal medicine physician records in Illinois
Louis Hiotis, M.D. is one of 7,238 internal medicine physician records with a practice address in Illinois. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2000 · median 2003 among the 3,580 with a school on file
- Record last updated2011 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,867 internal medicine physician records list a practice address in Chicago
They are 2,867 of the 63,379 NPPES records with a practice address in Chicago, and 7,238 internal medicine physician records in Illinois.
All 7,238 in Illinois → Every provider in Chicago → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Patricia Bush, MDChicago, IL 606041649482464
- Amy Chen, MDChicago, IL 606041154663532
- Angelo Costas, M.D.Chicago, IL 606041104874791
- Steven Deangeles, MDChicago, IL 606041467438630
- Ami Desai, M.D.Chicago, IL 606041710097795
- Greg Ewert, M.D.Chicago, IL 606041376591974
- Elaine Leboff-Ries, M.D.Chicago, IL 606041013965771
- Dominic Leung, MDChicago, IL 606041144230335
Common questions
What is Louis Hiotis, M.D.'s NPI number?
Louis Hiotis, M.D.'s National Provider Identifier (NPI) is 1710980339, issued on May 27, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Louis Hiotis, M.D. located?
The NPPES record lists a practice address at 200 S. Michigan Avenue, Chicago, IL, 60604. Phone: (312) 922-3815. Providers update this record themselves, so call before visiting.
How can I verify Louis Hiotis, M.D.'s license?
NPPES lists Illinois license number 036-108161, 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 Louis Hiotis, M.D. prescribe under Medicare Part D?
In 2024, Louis Hiotis, M.D. had 2,274 Medicare Part D claims for 170 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.