Daniel Daeyol So, M.D.
NPI 1023167004ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Arlington Heights, IL
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with Beloit Health System Inc and 1 other group, practicing in Arlington Heights, Illinois. Their prescriptions cost Medicare Part D more than their services did: $3,804,726 for 8,775 claims, against $208,396 paid for services in 2024. Lilly USA, LLC was the largest of 34 companies reporting payments in 2025, $35,975 in all, mostly speaking and faculty fees. Lists Advocate Good Shepherd Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1023167004 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 9, 2007 |
| Last updated in NPPES | Apr 28, 2023 |
| Certified by provider | Apr 28, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 036107882 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (IL); Practitioner - Endocrinology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 923 |
|---|---|
| Services billed | 2,743 across 25 procedure codes |
| Paid by Medicare | $208,396 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,775 · 23,049 30-day fills |
|---|---|
| Patients | 1,092 |
| Total drug cost | $3,804,726 |
| Generic share | 42% of claims |
Education and affiliations
| Graduation year | 1993 |
|---|---|
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Medical groups
- Beloit Health System IncBeloit, WI · 135 clinicians
- Suburban Endocrinology and DiabetesArlington Heights, IL · 8 clinicians
Hospital affiliations
- Advocate Good Shepherd HospitalBarrington, IL
- Beloit Health SystemBeloit, WI
- Northwest Community Hospital 1Arlington Heights, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- St Alexius Medical CenterHoffman Estates, IL
Industry payments (Open Payments)
- 2025$35,975 · 254 payments from 34 companies
- 2024$26,178 · 223 payments from 35 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $22,986 | 57 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $8,144 | 16 |
| Corcept Therapeutics | $914.99 | 21 |
| Dexcom, Inc. | $486.83 | 10 |
| Neurocrine Biosciences, Inc. | $432.25 | 10 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$30,063 · 32 payments
- Food and Beverage$5,888 · 220 payments
- Education$24.45 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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