Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Charles A Longo, M.D.

Cardiovascular Disease Physician in Dubuque, IA · enumerated 2006.

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

National Provider Identifier

1700855186

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Charles A Longo

Credential M.D.

Sex Male

Practice address 1515 Delhi St, Ste 100, Dubuque, IA, 52001

Phone (563) 557-9111

Fax (563) 589-4046

Enumeration date Mar 16, 2006

Last updated in NPPES Oct 18, 2007

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 20324 (IA) 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
0152744	Medicaid	IA	-
30225800	Medicaid	WI	-

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 Charles Longo?

The National Provider Identifier (NPI) for Charles Longo is 1700855186, a Type 1 (individual) record in the CMS NPPES registry.

Where does Charles Longo practice?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-10-18.