Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ronald Scott Sims, M.D.

Q: What is the NPI number for Ronald Sims?

The National Provider Identifier (NPI) for Ronald Sims is 1639138837, a Type 1 (individual) record in the CMS NPPES registry.

Neurology Physician in Dubuque, IA · enumerated 2006 · practices at Midwest Sleep Services, Inc..

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

National Provider Identifier

1639138837

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Registry record

Entity type Individual (Type 1)

Name Ronald Scott Sims

Credential M.D.

Sex Male

Practice address 2140 John F Kennedy Rd, Suite C, Dubuque, IA, 52002

Phone (563) 583-1558

Fax (563) 583-0443

Enumeration date Mar 17, 2006

Last updated in NPPES Dec 18, 2012

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 27457 (IA) Primary

2084S0012X Sleep Medicine (Psychiatry & Neurology) Physician Allopathic & Osteopathic Physicians · License 27457 (IA) Secondary

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
7296137	Medicaid	IA	-

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 Ronald Sims practice?

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

What is the NPI number for Ronald Sims?

The National Provider Identifier (NPI) for Ronald Sims is 1639138837, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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George Isaac Specialist · Dubuque, IA NPI 1588652416 Juan Nieto Ophthalmology Physician · Dubuque, IA NPI 1780770156 Midwest Sleep Services, Inc. Sleep Disorder Diagnostic Clinic/Center · Dubuque, IA NPI 1508118183

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-18.