Dr. Larry A Marklin, DC

Dr. Larry A Marklin is a Chiropractor provider (Chiropractor) practicing in Denison, TX, registered in the NPPES registry with NPI 1033114251 since 2005. The credential DC stands for Doctor of Chiropractic. Practices at Haarmark, PA (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum

NPI	1033114251
Entity type	Individual (Type 1)
Name	Dr. Larry A Marklin
Credential	DC
Sex	Male
Practice address	618 CLEVE COLE RD, Denison, TX, 75021
Phone	9038934111
Fax	9038931914
Enumeration date	2005-06-15
Last updated in NPPES	2025-03-04

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
111NI0900X	Internist Chiropractor	Secondary	4746	TX
111N00000X	Chiropractor	Primary	4746	TX

DC — Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Copy-ready billing details

Provider: Larry Marklin, DC
NPI: 1033114251
Taxonomy: 111N00000X (Chiropractor)
Address: 618 CLEVE COLE RD, Denison, TX, 75021

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1376672501	Haarmark, PA	Organization	Chiropractor	Denison, TX

Verify this record

Cross-check NPI 1033114251 against the authoritative CMS record: view Dr. Larry A Marklin 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

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.

What specialty is Larry Marklin?

Larry Marklin is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2025-03-04.