Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Margaret Decker Malaro, M.D.

Family Medicine Physician in Centreville, MD · enumerated 2005.

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

National Provider Identifier

1730180027

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Registry record

Entity type Individual (Type 1)

Name Ms. Margaret Decker Malaro

Credential M.D.

Sex Female

Practice address 202 Coursevall Dr, Centreville, MD, 21617

Phone (410) 758-3303

Fax (410) 758-3310

Enumeration date Aug 9, 2005

Last updated in NPPES Nov 29, 2013

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License D0055127 (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
9118749	Other	MD	CIGNA PIN
P16282	Other	MD	CAREFIRST MPOS
028274	Other	MD	JHHC PROVIDER NUMBER
355703100	Medicaid	MD	-
83108504	Other	-	BCBS MD
P8650002	Other	-	BCBS DC
8145086	Other	MD	MAMSI PRIMARY CARE
831085-03	Other	MD	CAREFIRST MD RENDERING
P00208139	Other	MD	RR MEDICARE
7605-0065	Other	MD	CAREFIRST BLUECHOICE
P18698	Other	-	BCBS POS
2145086	Other	MD	MAMSI SPECIALIST
3481753	Other	MD	AETNA CAPITATED
5965386	Other	MD	AETNA FEE FOR SERVICE

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

Where does Margaret Malaro practice?

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

What is the NPI number for Margaret Malaro?

The National Provider Identifier (NPI) for Margaret Malaro is 1730180027, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-29.