Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Michelle M Santiago Rivera, M.D.

Pediatric Rheumatology Physician in Rio Piedras, PR · enumerated 2012.

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

National Provider Identifier

1639445430

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Registry record

Entity type Individual (Type 1)

Name Michelle M Santiago Rivera

Credential M.D.

Sex Female

Practice address Rio Piedras, PR, 00924

Phone (787) 767-1414

Enumeration date Mar 26, 2012

Last updated in NPPES Dec 27, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

2080P0216X Pediatric Rheumatology Physician Allopathic & Osteopathic Physicians · License 18146 (PR) 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
18146	Other	PR	LICENCIA 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

How do I verify Michelle Santiago Rivera's NPI record?

Cross-check NPI 1639445430 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639445430 active?

Yes, as of the latest NPPES snapshot, NPI 1639445430 is active (record last updated 2012-12-27).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-27.