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

Dr. David Ly, MD

Q: What is the NPI number for David Ly?

The National Provider Identifier (NPI) for David Ly is 1477879864, a Type 1 (individual) record in the CMS NPPES registry.

Radiation Oncology Physician in Visalia, CA · enumerated 2010.

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

National Provider Identifier

1477879864

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Registry record

Entity type Individual (Type 1)

Name Dr. David Ly

Credential MD

Sex Male

Practice address Visalia, CA, 93277

Phone (559) 624-3100

Enumeration date Apr 12, 2010

Last updated in NPPES Feb 19, 2026

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

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License A141368 (CA) 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
P01536506	Other	AZ	RAILROAD MEDICARE
QZZ000000061638	Other	AZ	MERCY CARE
3495287	Other	AZ	CIGNA
041529	Medicaid	AZ	-
7140968	Other	AZ	AETNA

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 David Ly?

The National Provider Identifier (NPI) for David Ly is 1477879864, a Type 1 (individual) record in the CMS NPPES registry.

Where does David Ly practice?

The practice location on file with NPPES is in Visalia, CA. 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 2026-02-19.