Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Rachel Marie Chastain, APNP
Nurse Practitioner in Green Bay, WI · enumerated 2016.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1942661566
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Registry record
Entity type Individual (Type 1)
Name Rachel Marie Chastain
Credential APNP
Sex Female
Practice address 519 S Monroe Ave, Green Bay, WI, 54301
Phone (920) 435-6601
Fax (920) 436-3840
Enumeration date Mar 9, 2016
Last updated in NPPES Nov 10, 2022
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 6785-33 (WI) Primary
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| F0914887 | Other | - | AMERICAN ACADEMY OF NURSE PRACTITIONERS |
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.
Frequently asked questions
What specialty is Rachel Chastain?
Rachel Chastain is registered in NPPES with the primary taxonomy of Nurse Practitioner. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Victoria Mcmeen Allergy & Immunology Physician · Green Bay, WI NPI 1548238850 Center for Asthma & Allergy, Inc. Allergy & Immunology Physician · Green Bay, WI NPI 1720031024 James Warpinski Allergy & Immunology Physician · Green Bay, WI NPI 1720034515 Center for Asthma & Allergy, Inc. Specialist · Green Bay, WI NPI 1700950888 Nana Sarkoah Fenny Allergy & Immunology (Internal Medicine) Physician · Green Bay, WI NPI 1689998262 Bellin Memorial Hospital Inc Allergy & Immunology Physician · Green Bay, WI NPI 1316286941
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-11-10.