Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ronald S Sinclair, M.D.

Internal Medicine Physician in Grants Pass, OR · enumerated 2005.

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

National Provider Identifier

1396741294

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Registry record

Entity type Individual (Type 1)

Name Dr. Ronald S Sinclair

Credential M.D.

Sex Male

Practice address 495 Sw Ramsey A Ve, Grants Pass, OR, 97527

Phone (541) 476-6644

Fax (541) 472-5673

Enumeration date Jun 24, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD15397 (OR) 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
150078	Medicaid	OR	-

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 Ronald Sinclair?

The National Provider Identifier (NPI) for Ronald Sinclair is 1396741294, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ronald Sinclair practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.