Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carlos A Madrid Jr., M.D.

Obstetrics & Gynecology Physician in Lowell, MA · enumerated 2006.

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

National Provider Identifier

1902831969

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Registry record

Entity type Individual (Type 1)

Name Carlos A Madrid Jr.

Credential M.D.

Sex Male

Practice address 275 Varnum Anenue, Apt. #208, Lowell, MA, 01854

Phone (978) 458-4333

Enumeration date Jul 11, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License 59560 (MA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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

Where does Carlos Madrid practice?

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

What is the NPI number for Carlos Madrid?

The National Provider Identifier (NPI) for Carlos Madrid is 1902831969, a Type 1 (individual) record in the CMS NPPES registry.

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