Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ahmad Mahallati-Shirazi, MD

Nephrology Physician in Seattle, WA · enumerated 2007.

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

National Provider Identifier

1043423775

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Registry record

Entity type Individual (Type 1)

Name Ahmad Mahallati-Shirazi

Credential MD

Sex Male

Practice address 1100 9th Ave, Seattle, WA, 98101

Phone (202) 223-6673

Enumeration date May 8, 2007

Last updated in NPPES Jun 25, 2013

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License MD60221637 (WA) 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
1043423775	Medicaid	WA	-
S062-0323	Other	MD	BLUE CROSS/BLUE SHIELD REGIONAL
925031-01	Other	MD	BLUE CROSS/BLUE SHIELD
413127400	Medicaid	MD	-
P00981400	Other	WA	RAILROAD MEDICARE

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 1043423775 active?

Yes, as of the latest NPPES snapshot, NPI 1043423775 is active (record last updated 2013-06-25).

How do I verify Ahmad Mahallati-Shirazi's NPI record?

Cross-check NPI 1043423775 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 2013-06-25.