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

Mrs. Martha Sperling Washburn, R.N.

Registered Nurse in Waukegan, IL · enumerated 2008 · practices at County of Lake.

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

National Provider Identifier

1538338678

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Registry record

Entity type Individual (Type 1)
Name Mrs. Martha Sperling Washburn
Credential R.N.
Sex Female
Practice address Waukegan, IL, 60085
Phone (847) 377-8470
Enumeration date Feb 22, 2008
Last updated in NPPES Feb 22, 2008

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

Taxonomy & licenses

163W00000X Registered Nurse Nursing Service Providers · License 41303517 (IL) Primary
RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN credential

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.

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Frequently asked questions

What is the NPI number for Martha Washburn?
The National Provider Identifier (NPI) for Martha Washburn is 1538338678, a Type 1 (individual) record in the CMS NPPES registry.
Where does Martha Washburn practice?
The practice location on file with NPPES is in Waukegan, IL. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-22.