Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Ronald William Graeff, MD

Allergy & Immunology Physician in Oskaloosa, IA · enumerated 2005.

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

National Provider Identifier

1730172339

Verified

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Registry record

Entity type Individual (Type 1)

Name Ronald William Graeff

Credential MD

Sex Male

Practice address Oskaloosa, IA, 52577

Phone (641) 672-3360

Fax (641) 672-3366

Enumeration date Aug 30, 2005

Last updated in NPPES Dec 24, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License 30479 (IA) Primary

2080P0214X Pediatric Pulmonology Physician Allopathic & Osteopathic Physicians · License 30479 (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
030004043	Other	-	RAILROAD MEDICARE
0155838	Medicaid	IA	-
42068106049	Other	-	JOHN DEERE HEALTH
59902	Other	IA	WELLMARK BCBS
H002	Other	-	TRIWEST
55920	Other	-	IOWA HEALTH SOLUTIONS

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 Graeff practice?

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

What is the NPI number for Ronald Graeff?

The National Provider Identifier (NPI) for Ronald Graeff is 1730172339, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-12-24.