Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mr. Robert A Massopust, PT
Physical Therapist in Addison, IL · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1821272659
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Registry record
Entity type Individual (Type 1)
Name Mr. Robert A Massopust
Credential PT
Sex Male
Practice address 721 W Lake St, Suite 110, Addison, IL, 60101
Phone (630) 543-7450
Fax (630) 543-7475
Enumeration date Dec 28, 2007
Last updated in NPPES Dec 1, 2010
Taxonomy & licenses
225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 070010142 (IL) Primary
PT · Physical Therapist: A licensed movement specialist treating injury and disability through exercise and rehabilitation.
About the PT credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 070010142 | Other | IL | ILLINOIS LICENSE |
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
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Robert Massopust?
Robert Massopust is registered in NPPES with the primary taxonomy of Physical Therapist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-01.