Guoyu Ling, M.D.
NPI 1104112994ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Saint Louis, MO
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with Ssm Health Care Group, practicing in Saint Louis, Missouri. Their prescriptions cost Medicare Part D more than their services did: $822,926 for 2,103 claims, against $17,025 paid for services in 2024. Dexcom, Inc. reported $35.06 in payments in 2025, mostly food and beverage. Lists Good Samaritan Regional Hlth Center and 1 other hospital as hospital affiliations.
Overview
| NPI | 1104112994 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 21, 2011 |
| Last updated in NPPES | May 23, 2025 |
| Certified by provider | May 23, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 2014021719 | MO |
| Internal Medicine | 207R00000X | 2014021719 | MO |
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 - Endocrinology (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 130 |
|---|---|
| Services billed | 279 across 8 procedure codes |
| Paid by Medicare | $17,025 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,103 · 4,165 30-day fills |
|---|---|
| Patients | 273 |
| Total drug cost | $822,926 |
| Generic share | 32% of claims |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
Medical group
- Ssm Health Care GroupSaint Louis, MO · 940 clinicians
Hospital affiliations
- Good Samaritan Regional Hlth CenterMount Vernon, IL
- Ssm Health Saint Louis University HospitalSaint Louis, MO
Industry payments (Open Payments)
- 2025$35.06 · 2 payments from 1 company
- 2024$96.35 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Dexcom, Inc. | $35.06 | 2 |
What the 2025 payments were for
- Food and Beverage$35.06 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 94 endocrinologists in Saint Louis · All endocrinologists in Missouri