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Robert P Mastroianni, MD

Family Medicine Physician in Makawao, HI · enumerated 2006 · practices at Robert Mastroianni MD Inc.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1023107844

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Registry record

Entity type Individual (Type 1)
Name Robert P Mastroianni
Credential MD
Sex Male
Practice address 81 Makawao Ave Ste 25, Makawao, HI, 96768
Phone (808) 573-8900
Fax (808) 572-3027
Enumeration date Oct 11, 2006
Last updated in NPPES Mar 13, 2018

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD10200 (HI) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
00B0239158 Other HI HMSA NUMBER
53842302 Medicaid HI -

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.

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Frequently asked questions

How do I verify Robert Mastroianni's NPI record?
Cross-check NPI 1023107844 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1023107844 active?
Yes, as of the latest NPPES snapshot, NPI 1023107844 is active (record last updated 2018-03-13).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-13.