NPI age
20 years
Enumerated 2005-09-23
● Active
Type 1 · Individual
Sherwin S. Foster, M.D.
Foster is 1 of 2 internal medicine providers in Hayden and 1 of 46 in Idaho.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
ID, WA
2 states
Status
Active
No deactivations on record
Last NPPES update
2021-06-16
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 46 active internal medicine providers in Idaho.
NPI age
20 years
≈ at median (19 yr)
State licenses
2 states
Top 71% — 28% of peers are multi-state
Subspecialties
0
37% of peers hold subspecialties
NPI lifetime · 2005 → 2026
2005-09Enumerated in NPPES
2005
2026
Where they practice
Practice location
1986 W Hayden Ave
Hayden, ID 838357412
Mailing address
1986 W Hayden Ave
Hayden, ID 838357412
Specialties
-
Internal Medicine PrimaryAn internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 | 11003341 | MEDICARE PTAN |
| 05 (ID) | 8078889 | |
| 05 (ID) | 8080036 | |
| 05 (WA) | 8497588 | |
| 05 (WA) | 7144785 | |
| 01 | 1370136 | MEDICARE GROUP PTAN |
Multi-state credentialing: Licensed in 2 states. Useful context for credentialers building cross-state provider networks.
Practice context
Part of a multi-provider practice. 3 other active providers share this practice address in NPPES.
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- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
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