Chao Guo, MD
NPI 1043606486ActiveIndividual· Internal Medicine· Stamford, CT
Internal Medicine (MD) with Kings Daughters Medical Specialties Inc and 3 other groups, practicing in Stamford, Connecticut. Mostly services rather than prescriptions: Medicare paid $28,605 for 220 patients in 2024, with only 18 Part D claims. Scpharmaceuticals Inc. reported $28.69 in payments in 2025, mostly food and beverage. Lists Canton-Potsdam Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1043606486 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 13, 2015 |
| Last updated in NPPES | Nov 10, 2021 |
| Certified by provider | Nov 10, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 286545 | MA |
| Internal Medicine | 207R00000X | 25MA10656300 | NJ |
| Internal Medicine | 207R00000X | ME135339 | FL |
| Hospitalist | 208M00000X | 036158670 | 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 - Hospitalist (IL); Practitioner - Internal Medicine (KY); Practitioner - Internal Medicine (MA); Practitioner - Internal Medicine (NJ); Practitioner - Internal Medicine (NY); Practitioner - Internal Medicine (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 220 |
|---|---|
| Services billed | 248 across 8 procedure codes |
| Paid by Medicare | $28,605 |
Part D prescriptions in 2024
| Prescriptions (claims) | 18 · 18 30-day fills |
|---|---|
| Total drug cost | $1,050 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- Kings Daughters Medical Specialties IncWheelersburg, OH · 400 clinicians
- Canton-Potsdam HospitalPotsdam, NY · 252 clinicians
- Hospital Medicine Services of Tennessee PCNashville, TN · 162 clinicians
- Nj Acute Care Specialists Professional CorporationFreehold, NJ · 55 clinicians
Hospital affiliations
- Canton-Potsdam HospitalPotsdam, NY
- Centrastate Medical CenterFreehold, NJ
- Cumberland Medical CenterCrossville, TN
- King's Daughters' Medical CenterAshland, KY
- Slhs Massena, IncMassena, NY
Industry payments (Open Payments)
- 2025$28.69 · 1 payment from 1 company
- 2024$83.34 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Scpharmaceuticals Inc. | $28.69 | 1 |
What the 2025 payments were for
- Food and Beverage$28.69 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 150 internal medicine physicians in Stamford · All internal medicine physicians in Connecticut