Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Ronald A Masukawa, DC
Chiropractor in Rockford, IL · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1972558609
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Registry record
Entity type Individual (Type 1)
Name Mr. Ronald A Masukawa
Credential DC
Sex Male
Practice address 5301 E State St, Suite 101, Rockford, IL, 61108
Phone (815) 397-8500
Fax (815) 397-8588
Enumeration date May 23, 2006
Last updated in NPPES Jul 18, 2025
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 10619759 | Other | - | UNICARE |
| 606447 | Other | - | AMERICAN CHIRO NETWORK |
| 606447 | Other | - | ILLINOIS CHIRO NETWORK |
| 606447 | Other | - | HOMANA |
| 04923223 | Other | IL | GROUP BLUE CROSS B S |
| 10619759 | Other | - | CAQH |
| 606447 | Other | - | PHCS |
| 6682917 | Other | - | CIGNA |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
Where does Ronald Masukawa practice?
The practice location on file with NPPES is in Rockford, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Ronald Masukawa?
The National Provider Identifier (NPI) for Ronald Masukawa is 1972558609, a Type 1 (individual) record in the CMS NPPES registry.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-18.