Heather A O'Mahen Willis, PHD
Heather A O'Mahen Willis is a Mental Health Counselor provider (Counselor) practicing in Ann Arbor, MI, registered in the NPPES registry with NPI 1063520708 since 2006. The credential PHD stands for Doctor of Philosophy.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1063520708 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Heather A O'Mahen Willis |
| Credential | PHD |
| Sex | Female |
| Practice address | Ann Arbor, MI, 48105 |
| Phone | 7349969111 |
| Fax | 7349961950 |
| Enumeration date | 2006-08-25 |
| Last updated in NPPES | 2007-07-08 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 101YM0800X | Mental Health Counselor | Primary | 6301012336 | MI |
PHD — Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential
Copy-ready billing details
Provider: Heather O'Mahen Willis, PHD NPI: 1063520708 Taxonomy: 101YM0800X (Mental Health Counselor) Address: Ann Arbor, MI, 48105
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1043220981 | Aacs, Inc. | Organization | Mental Health Counselor | Ann Arbor, MI |
| 1366455016 | Margaret Cressman | Individual | Mental Health Counselor | Ann Arbor, MI |
| 1366455040 | Peter Ferguson | Individual | Clinical Social Worker | Ann Arbor, MI |
| 1124031984 | Julius Ballew | Individual | Mental Health Counselor | Ann Arbor, MI |
| 1740293513 | Richard Barber | Individual | Mental Health Counselor | Ann Arbor, MI |
| 1356354120 | Marguerite Ballew | Individual | Mental Health Counselor | Ann Arbor, MI |
| 1114930849 | Barry Breakey | Individual | Mental Health Counselor | Ann Arbor, MI |
| 1083627681 | Susan Gibney | Individual | Mental Health Counselor | Ann Arbor, MI |
Verify this record
Cross-check NPI 1063520708 against the authoritative CMS record: view Heather A O'Mahen Willis on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.