Dr. Keith Lynch Marks, D.C.
Dr. Keith Lynch Marks is a Chiropractor provider (Chiropractor) practicing in Marathon, WI, registered in the NPPES registry with NPI 1619012333 since 2007. The credential DC stands for Doctor of Chiropractic.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1619012333 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Keith Lynch Marks |
| Credential | D.C. |
| Sex | Male |
| Practice address | Marathon, WI, 54448 |
| Phone | 7154436777 |
| Fax | 7154433177 |
| Enumeration date | 2007-02-20 |
| Last updated in NPPES | 2011-11-16 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 111N00000X | Chiropractor | Primary | 3377 | WI |
DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 38897800 | Medicaid | WI | — |
Copy-ready billing details
Provider: Keith Marks, D.C. NPI: 1619012333 Taxonomy: 111N00000X (Chiropractor) Address: Marathon, WI, 54448
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1417499567 | Derek Lund | Individual | Chiropractor | Marathon, WI |
| 1851919773 | Family Foot and Ankle Clinic LLC | Organization | Podiatrist | Marathon, WI |
| 1588335483 | Marks Chiropractic, LLC | Organization | Chiropractor | Marathon, WI |
| 1740042787 | Marathon Spine & Wellness, LLC | Organization | Chiropractor | Marathon, WI |
Verify this record
Cross-check NPI 1619012333 against the authoritative CMS record: view Dr. Keith Lynch Marks 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 2011-11-16.