NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Liwanag, DO, MPH

Cardiovascular Disease Physician in Hilton Head Island, SC · enumerated 2014.

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

National Provider Identifier

1932514858

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Mark Liwanag
Credential DO, MPH
Sex Male
Practice address 8 Hospital Center Blvd Ste 150, Hilton Head Island, SC, 29926
Phone (854) 235-2730
Enumeration date Jun 30, 2014
Last updated in NPPES Mar 3, 2026

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 95481 (SC) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 5101021270 (MI) Secondary
207RC0001X Clinical Cardiac Electrophysiology Physician Allopathic & Osteopathic Physicians · License 009640 (AZ) Secondary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

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

What is the NPI number for Mark Liwanag?
The National Provider Identifier (NPI) for Mark Liwanag is 1932514858, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Liwanag practice?
The practice location on file with NPPES is in Hilton Head Island, SC. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

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