Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph Merck

Q: What is the NPI number for Joseph Merck?

The National Provider Identifier (NPI) for Joseph Merck is 1558742783, a Type 1 (individual) record in the CMS NPPES registry.

Ophthalmology Physician in Crosby, MN · enumerated 2015.

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

National Provider Identifier

1558742783

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Registry record

Entity type Individual (Type 1)

Name Joseph Merck

Sex Male

Practice address 1 3rd Ave Ne, Crosby, MN, 56441

Phone (218) 546-5108

Fax (218) 546-5736

Enumeration date Jun 12, 2015

Last updated in NPPES Aug 6, 2019

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License BP10054312 (TX) Secondary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 65042 (MN) Primary

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

Where does Joseph Merck practice?

The practice location on file with NPPES is in Crosby, MN. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Joseph Merck?

The National Provider Identifier (NPI) for Joseph Merck is 1558742783, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-08-06.