Khai Sheng Chang, MD
NPI 1881665222ActiveIndividual· Internal Medicine· Mount Dora, FL
Internal Medicine (MD) with Lakeview Healthcare System, LLC, practicing in Mount Dora, Florida. Their prescriptions cost Medicare Part D more than their services did: $1,650,661 for 24,806 claims, against $287,577 paid for services in 2024. Amgen Inc. was the largest of 17 companies reporting payments in 2025, $908.44 in all, mostly food and beverage. Lists Adventhealth Waterman as a hospital affiliation.
Overview
| NPI | 1881665222 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Feb 1, 2006 |
| Last updated in NPPES | Jan 11, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | ME75650 | FL |
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 (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 600 |
|---|---|
| Services billed | 13,061 across 155 procedure codes |
| Paid by Medicare | $287,577 |
Part D prescriptions in 2024
| Prescriptions (claims) | 24,806 · 62,685 30-day fills |
|---|---|
| Patients | 1,700 |
| Total drug cost | $1,650,661 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Lakeview Healthcare System, LLCSummerfield, FL · 27 clinicians
Hospital affiliation
- Adventhealth WatermanTavares, FL
Other facilities
- Vitas Healthcare Corporation of FloridaHospice · Melbourne, FL
Industry payments (Open Payments)
- 2025$908.44 · 36 payments from 17 companies
- 2024$489.80 · 21 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $258.81 | 5 |
| Pfizer Inc. | $124.74 | 6 |
| Glaxosmithkline, LLC. | $68.09 | 4 |
| Phathom Pharmaceuticals, Inc. | $67.59 | 1 |
| Novo Nordisk Inc | $48.01 | 2 |
What the 2025 payments were for
- Food and Beverage$733.44 · 35 payments
- Consulting Fee$175.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 29 internal medicine physicians in Mount Dora · All internal medicine physicians in Florida