Charles Xiaodong Ma, M.D.
NPI 1174979611ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Wilton, CT
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) in Wilton, Connecticut, trained at University of Connecticut School of Medicine (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $1,009,840 for 2,194 claims, against $150,329 paid for services in 2024. Mannkind Corporation was the largest of 8 companies reporting payments in 2025, $260.11 in all, mostly food and beverage.
Overview
| NPI | 1174979611 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | May 13, 2016 |
| Last updated in NPPES | May 25, 2021 |
| Certified by provider | May 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 68083 | CT |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 330 |
|---|---|
| Services billed | 5,120 across 17 procedure codes |
| Paid by Medicare | $150,329 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,194 · 4,440 30-day fills |
|---|---|
| Patients | 322 |
| Total drug cost | $1,009,840 |
| Generic share | 41% of claims |
Education and affiliations
| Medical school | University of Connecticut School of Medicine |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Endocrinology |
| Telehealth | Offers telehealth |
Hospital affiliations
- Danbury HospitalDanbury, CT
- Norwalk HospitalNorwalk, CT
Industry payments (Open Payments)
- 2025$260.11 · 10 payments from 8 companies
- 2024$302.59 · 13 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mannkind Corporation | $72.85 | 2 |
| Amgen Inc. | $41.85 | 2 |
| Beta Bionics, Inc. | $37.25 | 1 |
| Radius Health, Inc. | $26.86 | 1 |
| Tandem Diabetes Care, Inc. | $24.69 | 1 |
What the 2025 payments were for
- Food and Beverage$217.61 · 9 payments
- Education$42.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other endocrinologists in Wilton
- 1518312438
- 1003839135
- 1346592862