Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert N Crank, MD

Diagnostic Radiology Physician in Watertown, SD · enumerated 2006.

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

National Provider Identifier

1669451100

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Registry record

Entity type Individual (Type 1)

Name Robert N Crank

Credential MD

Sex Male

Practice address 901 4th St Nw, Watertown, SD, 57201

Phone (605) 886-8471

Fax (605) 886-9317

Enumeration date Jan 12, 2006

Last updated in NPPES Nov 25, 2011

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 1750 (SD) 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
7202202	Medicaid	SD	-

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.

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Frequently asked questions

How do I verify Robert Crank's NPI record?

Cross-check NPI 1669451100 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1669451100 active?

Yes, as of the latest NPPES snapshot, NPI 1669451100 is active (record last updated 2011-11-25).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-25.