Kaihua Lai, M.D.
NPI 1689649659ActiveIndividual· Internal Medicine· Naperville, IL
Internal Medicine (M.D.) with Central Dupage Physician Group and 1 other group, practicing in Naperville, Illinois. Their prescriptions cost Medicare Part D more than their services did: $612,888 for 5,204 claims, against $96,206 paid for services in 2024. Lilly USA, LLC was the largest of 4 companies reporting payments in 2025, $265.31 in all, mostly food and beverage. Lists Northwestern Medicine Central Dupage Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1689649659 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 22, 2006 |
| Last updated in NPPES | Jan 13, 2026 |
| Certified by provider | Jan 13, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036100511 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 269 |
|---|---|
| Services billed | 3,132 across 87 procedure codes |
| Paid by Medicare | $96,206 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,204 · 12,631 30-day fills |
|---|---|
| Patients | 450 |
| Total drug cost | $612,888 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1985 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Central Dupage Physician GroupGeneva, IL · 1,080 clinicians
- Premier Suburban Medical Group, PLLCNew Lenox, IL · 29 clinicians
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Palos Community HospitalPalos Heights, IL
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Industry payments (Open Payments)
- 2025$265.31 · 17 payments from 4 companies
- 2024$362.39 · 19 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $193.80 | 13 |
| Novo Nordisk Inc | $37.33 | 2 |
| Janssen Pharmaceuticals, Inc | $18.52 | 1 |
| Exact Sciences Corporation | $15.66 | 1 |
What the 2025 payments were for
- Food and Beverage$265.31 · 17 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 114 internal medicine physicians in Naperville · All internal medicine physicians in Illinois