Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Marichu Theresa A. Matas, M.D.

Internal Medicine Physician in Rockville, MD · enumerated 2008.

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

National Provider Identifier

1558526228

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Registry record

Entity type Individual (Type 1)

Name Dr. Marichu Theresa A. Matas

Credential M.D.

Sex Female

Practice address 10110 Molecular Drive, Suite 206, Rockville, MD, 20850

Phone (301) 279-2779

Fax (240) 403-0190

Enumeration date Jul 22, 2008

Last updated in NPPES Aug 12, 2025

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License D69148 (MD) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D0069148 (MD) 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
404776100	Medicaid	MD	-
026406700	Medicaid	MD	-

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 Marichu Theresa Matas?

The National Provider Identifier (NPI) for Marichu Theresa Matas is 1558526228, a Type 1 (individual) record in the CMS NPPES registry.

Where does Marichu Theresa Matas practice?

The practice location on file with NPPES is in Rockville, MD. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-12.