NPI Portal NPI Lookup & Verification

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

Macy Dieleman, O.D.

Optometrist in Boone, IA · enumerated 2016 · practices at Mcfarland Clinic, PC.

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

National Provider Identifier

1891148151

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Macy Dieleman
Credential O.D.
Sex Female
Practice address Boone, IA, 50036
Phone (515) 432-2020
Fax (515) 432-8482
Enumeration date Jul 21, 2016
Last updated in NPPES Dec 28, 2020

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 083098 (IA) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier Type State Issuer
1219526 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

Is NPI 1891148151 active?
Yes, as of the latest NPPES snapshot, NPI 1891148151 is active (record last updated 2020-12-28).
How do I verify Macy Dieleman's NPI record?
Cross-check NPI 1891148151 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-28.