NPI age
5 years
Enumerated 2021-03-24
● Active
Type 1 · Individual
Michael Massaro, DO
Massaro is 1 of 225 internal medicine providers in Boise and 1 of 504 in Idaho.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
ID, IN
2 states
Status
Active
No deactivations on record
Last NPPES update
2025-02-27
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 504 active internal medicine providers in Idaho.
NPI age
5 years
↓ 11 yr below median (16 yr)
State licenses
2 states
Top 76% — 23% of peers are multi-state
Subspecialties
0
44% of peers hold subspecialties
NPI lifetime · 2021 → 2026
2021-03Enumerated in NPPES
2021
2026
Where they practice
Practice location
190 E Bannock St
Boise, ID 837126241
Mailing address
190 E Bannock St
Boise, ID 837126241
Additional practice locations
2 secondary locations on file with NPPES.
Location 2
8414 Naab Rd Ste 100
Indianapolis, IN 462601972
Location 3
2001 W 86th St
Indianapolis, IN 462601902
Specialties
-
Internal Medicine PrimaryA 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,...
Practice context
Part of a multi-provider practice. 671 other active providers share this practice address in NPPES.
Recently enumerated nearby: 4 new internal medicine providers have been added in Boise in the last 180 days.
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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.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.