Dr. Donald L Knowles, DDS
Dr. Donald L Knowles is a Oral and Maxillofacial Pathology Dentistry provider (Dentist) practicing in Lima, OH, registered in the NPPES registry with NPI 1861536468 since 2007. The credential DDS stands for Doctor of Dental Surgery.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1861536468 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Donald L Knowles |
| Credential | DDS |
| Sex | Male |
| Practice address | Lima, OH, 45805 |
| Phone | 4192221188 |
| Fax | 4192284305 |
| Enumeration date | 2007-02-16 |
| 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 |
|---|---|---|---|---|
| 1223P0106X | Oral and Maxillofacial Pathology Dentistry | Primary | 16626 | OH |
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential
Copy-ready billing details
Provider: Donald Knowles, DDS NPI: 1861536468 Taxonomy: 1223P0106X (Oral and Maxillofacial Pathology Dentistry) Address: Lima, OH, 45805
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1831799774 | Kristina Hartman | Individual | Licensed Practical Nurse | Lima, OH |
| 1962169730 | Kaitlyn Marbaugh | Individual | Social Worker | Lima, OH |
| 1548990203 | Paula Ellerbrock | Individual | Case Manager/Care Coordinator | Lima, OH |
| 1063124618 | Cameran Deffenbaugh | Individual | Addiction (Substance Use Disorder) Counselor | Lima, OH |
| 1396522157 | Michelle Porter | Individual | Case Manager/Care Coordinator | Lima, OH |
| 1437976719 | Tacoma Lawson | Individual | Case Manager/Care Coordinator | Lima, OH |
| 1962220285 | Universal Amponsah-Ntsiful | Individual | Case Manager/Care Coordinator | Lima, OH |
| 1467262766 | Madisyn Sheppard | Individual | Social Worker | Lima, OH |
Verify this record
Cross-check NPI 1861536468 against the authoritative CMS record: view Dr. Donald L Knowles 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
What is the NPI number for Donald Knowles?
Where does Donald Knowles practice?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.