Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nayyar Siddique, MD

Hematology & Oncology Physician in Oceanside, CA · enumerated 2007 · practices at North County Oncology Medical Clinic Inc.

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

National Provider Identifier

1497890610

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Registry record

Entity type Individual (Type 1)

Name Nayyar Siddique

Credential MD

Sex Male

Practice address 3617 Vista Way, Oceanside, CA, 92056

Phone (760) 758-5770

Fax (760) 721-8597

Enumeration date Feb 21, 2007

Last updated in NPPES Apr 18, 2024

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License LT20873 (ND) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License A62744 (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
00A627440	Medicaid	CA	-

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 Nayyar Siddique's NPI record?

Cross-check NPI 1497890610 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1497890610 active?

Yes, as of the latest NPPES snapshot, NPI 1497890610 is active (record last updated 2024-04-18).

Other providers at this practice address

Browse all →

North County Oncology Medical Clinic Inc Hematology & Oncology Physician · Oceanside, CA NPI 1457486433 Himani Singh Hematology & Oncology Physician · Oceanside, CA NPI 1558546192 Catherine Quinn Hematology & Oncology Physician · Oceanside, CA NPI 1427403641 Danielle Watts Physician Assistant · Oceanside, CA NPI 1609608967 Angela Anson Oncology Pharmacist · Oceanside, CA NPI 1528993961

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-18.