NPI age
19 years
Enumerated 2006-07-13
● Active
Type 1 · Individual
Steven J Fonken, MD
Fonken is 1 of 28 internal medicine providers in Boise and 1 of 100 in Idaho.
Primary specialty
Internal Medicine
Plus 2 subspecialties
Licensed in
ID
1 state
Status
Active
No deactivations on record
Last NPPES update
2022-03-01
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 100 active internal medicine providers in Idaho.
NPI age
19 years
≈ at median (19 yr)
State licenses
1 state
31% of peers hold multiple states
Subspecialties
2
In the 47% of peers with subspecialties
NPI lifetime · 2006 → 2026
2006-07Enumerated in NPPES
2006
2026
Where they practice
Practice location
500 W. Fort St, # 111
Boise, ID 83702
Mailing address
500 W. Fort St, # 111
Boise, ID 83702
Specialties
-
Internal Medicine PrimaryAn internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
-
Internal MedicineA physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer,...
-
Internal MedicineAn area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical...
Identifiers
| Type | Value | Notes |
|---|---|---|
| 01 | 000010027675 | REGENCE BLUE SHIELD OF ID |
| 05 (ID) | 805658400 | |
| 01 | 59923 | BLUE CROSS OF IDAHO |
Practice context
Part of a multi-provider practice. 7 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 →
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