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

Alessandra Amy Elizabeth Ross, MD

Orthopaedic Surgery Physician in Arcata, CA · enumerated 2006.

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

National Provider Identifier

1275643199

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Registry record

Entity type Individual (Type 1)

Name Alessandra Amy Elizabeth Ross

Credential MD

Sex Female

Practice address Arcata, CA, 95521

Phone (707) 826-7846

Fax (707) 826-7845

Enumeration date Aug 30, 2006

Last updated in NPPES Sep 16, 2015

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

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 0101236659 (VA) Secondary

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 128009 (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
A128009	Other	CA	CA MEDICAL LICENSE
12652821	Other	CA	CAQH

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

Is NPI 1275643199 active?

Yes, as of the latest NPPES snapshot, NPI 1275643199 is active (record last updated 2015-09-16).

How do I verify Alessandra Ross's NPI record?

Cross-check NPI 1275643199 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-16.