Constantine Wonais, MD
NPI 1457340267 · Internal Medicine Physician · Naperville, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Constantine Wonais, MD is a Internal Medicine Physician provider in Naperville, IL (NPI 1457340267).
Provider details
- NPI number
- 1457340267
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 036062093 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 35 | 13 |
| Metoprolol Succinate | 35 | — |
| Atorvastatin Calcium | 32 | 16 |
| Amlodipine Besylate | 23 | — |
| Donepezil Hcl | 23 | — |
| Losartan Potassium | 15 | — |
| Allopurinol | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-10-14
- Last updated
- 2021-02-04
- Certified
- 2021-02-04
Frequently asked questions
- What is Constantine Wonais's NPI number?
- Constantine Wonais's National Provider Identifier (NPI) is 1457340267, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Constantine Wonais's specialty?
- Constantine Wonais is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Constantine Wonais located?
- Constantine Wonais's practice location on file with NPPES is 2255 Monarch Dr, Naperville, IL 60563-4164.
- What is Constantine Wonais's phone number?
- The practice phone number listed in the NPPES registry for Constantine Wonais is (630) 300-1125.
- Does Constantine Wonais accept Medicare?
- Constantine Wonais is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Constantine Wonais's NPI active?
- Yes — Constantine Wonais's NPI (1457340267) is active in the NPPES registry as of the last update on 2021-02-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.