Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Marian Heykoop
Social Worker in Muskegon, MI · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1679196968
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Registry record
Entity type Individual (Type 1)
Name Marian Heykoop
Sex Female
Practice address 1470 Peck St, Muskegon, MI, 49441
Phone (231) 724-3517
Enumeration date May 21, 2020
Last updated in NPPES May 21, 2020
Taxonomy & licenses
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 Marian Heykoop?
Marian Heykoop is registered in NPPES with the primary taxonomy of Social Worker. 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 → Ronald Pouch Adult Psychiatric/Mental Health Registered Nurse · Muskegon, MI NPI 1225258098 Barbara Koski Adult Psychiatric/Mental Health Registered Nurse · Muskegon, MI NPI 1720209778 Kara Jaekel Addiction (Substance Use Disorder) Counselor · Muskegon, MI NPI 1407077118 Suzanne Hosler Social Worker · Muskegon, MI NPI 1326572660 Nicole Norman Social Worker · Muskegon, MI NPI 1992328280 Monique Winters Mental Health Counselor · Muskegon, MI NPI 1063035350
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-05-21.