Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark C Schwab, M.D.

Cardiovascular Disease Physician in Wailuku, HI · enumerated 2006 · practices at Howard G. Barbarosh MD Inc.

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

National Provider Identifier

1104880145

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mark C Schwab

Credential M.D.

Sex Male

Practice address 1887 Wili PA Loop, Suite 1, Wailuku, HI, 96793

Phone (808) 244-8993

Fax (808) 244-9885

Enumeration date Apr 14, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 6263 (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
02675101	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1104880145 active?

Yes, as of the latest NPPES snapshot, NPI 1104880145 is active (record last updated 2007-07-08).

How do I verify Mark Schwab's NPI record?

Cross-check NPI 1104880145 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Howard G. Barbarosh MD Inc Cardiovascular Disease Physician · Wailuku, HI NPI 1407866973

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.