Leonard Piazza, M.D.
NPI 1083633663 · Otolaryngology Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leonard Piazza, M.D. is a Otolaryngology Physician provider in Naperville, IL (NPI 1083633663).
Provider details
- NPI number
- 1083633663
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
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
19 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
908 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 456 | $136 |
| Exam of Ear Using a Microscope92504 | 197 | $31 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 148 | $178 |
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 | 56 | $139 |
| Ct Guidance for Needle Or Tube Localization77011 | 34 | $236 |
| Biopsy Or Removal of Nasal Polyp Or Tissue Using an Endoscope31237 | 17 | $417 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ipratropium Bromide | 226 | 68 |
| Fluticasone Propionate | 213 | 101 |
| Omeprazole | 72 | 25 |
| Azelastine Hcl | 57 | 33 |
| Methylprednisolone | 52 | 44 |
| Cefuroxime Axetilbrand: Cefuroxime | 44 | 34 |
| Triamterene/Hydrochlorothiazidbrand: Triamterene-Hydrochlorothiazid | 39 | 22 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$158 across 2 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
- 2006-07-18
- Last updated
- 2022-07-21
Frequently asked questions
- What is Leonard Piazza's NPI number?
- Leonard Piazza's National Provider Identifier (NPI) is 1083633663, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Piazza's specialty?
- Leonard Piazza is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Leonard Piazza located?
- Leonard Piazza's practice location on file with NPPES is 10 W Martin Ave Ste 260, Naperville, IL 60540-6547.
- What is Leonard Piazza's phone number?
- The practice phone number listed in the NPPES registry for Leonard Piazza is (630) 355-5668.
- Does Leonard Piazza accept Medicare?
- Leonard Piazza is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leonard Piazza's NPI active?
- Yes — Leonard Piazza's NPI (1083633663) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.