Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Karen S Underhill, ANP-C
Nurse Practitioner in Ann Arbor, MI · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1679590285
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Registry record
Entity type Individual (Type 1)
Name Karen S Underhill
Credential ANP-C
Sex Female
Practice address 1200 Earhart Rd, Ann Arbor, MI, 48105
Phone (734) 769-0177
Enumeration date Jul 17, 2006
Last updated in NPPES Feb 9, 2015
Taxonomy & licenses
363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4704146521 (MI) Primary
363LA2200X Adult Health Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License 4704146521 (MI) Secondary
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
Where does Karen Underhill practice?
The practice location on file with NPPES is in Ann Arbor, MI. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Karen Underhill?
The National Provider Identifier (NPI) for Karen Underhill is 1679590285, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Glacier Hills Inc. Skilled Nursing Facility · Ann Arbor, MI NPI 1811936768 Grace Jenq Geriatric Medicine (Internal Medicine) Physician · Ann Arbor, MI NPI 1790710382 Nancylee Stier Geriatric Medicine (Internal Medicine) Physician · Ann Arbor, MI NPI 1306924451 Liza Marie Bautista Internal Medicine Physician · Ann Arbor, MI NPI 1376787218 Cherie Netzloff Physical Medicine & Rehabilitation Physician · Ann Arbor, MI NPI 1457615049 Lisa Petroff Occupational Therapist · Ann Arbor, MI NPI 1891030953 Glacier Hills, Inc. Physical Therapist · Ann Arbor, MI NPI 1780924639 Suzanne Plante Family Nurse Practitioner · Ann Arbor, MI NPI 1902241896
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-02-09.