Louis Hiotis, M.D.
NPI 1710980339 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Louis Hiotis, M.D. is a Internal Medicine Physician provider in Chicago, IL (NPI 1710980339).
Provider details
- NPI number
- 1710980339
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036-108161 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
453 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 150 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 141 | $132 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 71 | $15 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 55 | $94 |
| Automated Urinalysis Test81003 | 19 | $2 |
| Administration of Influenza Virus VaccineG0008 | 17 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 51 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 187 | 54 |
| Rosuvastatin Calcium | 155 | 48 |
| Amlodipine Besylate | 94 | 30 |
| Losartan Potassium | 90 | 24 |
| Metoprolol Succinate | 70 | 23 |
| Pantoprazole Sodium | 62 | 20 |
| Levothyroxine Sodium |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$447 across 20 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-05-27
- Last updated
- 2011-03-18
Frequently asked questions
- What is Louis Hiotis's NPI number?
- Louis Hiotis's National Provider Identifier (NPI) is 1710980339, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Louis Hiotis's specialty?
- Louis Hiotis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Louis Hiotis located?
- Louis Hiotis's practice location on file with NPPES is 200 S. Michigan Avenue, Chicago, IL 60604.
- What is Louis Hiotis's phone number?
- The practice phone number listed in the NPPES registry for Louis Hiotis is (312) 922-3815.
- Does Louis Hiotis accept Medicare?
- Louis Hiotis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Louis Hiotis's NPI active?
- Yes — Louis Hiotis's NPI (1710980339) is active in the NPPES registry as of the last update on 2011-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.