Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Johan K. Ahn, MD

Q: What is the NPI number for Johan Ahn?

The National Provider Identifier (NPI) for Johan Ahn is 1972546240, a Type 1 (individual) record in the CMS NPPES registry.

Diagnostic Radiology Physician in Tacoma, WA · enumerated 2006 · practices at Medical Imaging Northwest - Good Samaritan Hospital Imaging Alliance.

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

National Provider Identifier

1972546240

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Registry record

Entity type Individual (Type 1)

Name Dr. Johan K. Ahn

Credential MD

Sex Male

Practice address 1304 Fawcett Ave Ste 100, Tacoma, WA, 98402

Phone (253) 761-4200

Fax (253) 761-4201

Enumeration date Jun 14, 2006

Last updated in NPPES Dec 30, 2024

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD151077 (OR) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD-9933 (HI) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD00042505 (WA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License A84698 (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
8399263	Medicaid	WA	-
1060681	Medicaid	OR	-
1060681	Medicaid	WA	-

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 Johan Ahn?

The National Provider Identifier (NPI) for Johan Ahn is 1972546240, a Type 1 (individual) record in the CMS NPPES registry.

Where does Johan Ahn practice?

The practice location on file with NPPES is in Tacoma, WA. 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 2024-12-30.