DR. MARK J HAMILTON MD
NPI 1689889255
Family Medicine in Mt Vernon, TX
About Dr. Mark J Hamilton Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK J HAMILTON MD (NPI 1689889255) is an individual family medicine provider in Mt Vernon, Texas, licensed in Texas (N1667) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with South Texas Spine And Surgical Hospital, and is a graduate of University Of Oklahoma College Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Mark J Hamilton Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Mark Hamilton reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dallas, TX 75246
- Reassigned Medicare billing, Texas enrollment
- 1,044 clinicians in this Medicare group
Mcalester, OK 74501
- Reassigned Medicare billing, Texas enrollment
- 70 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,338 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,439 clinicians in this Medicare group
Corpus Christi, TX 78414
- Reassigned Medicare billing, Texas enrollment
- 90 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
South Texas Spine And Surgical Hospital
Acute Care Hospitals · San Antonio, TXThe Heart Hospital Baylor Denton
Acute Care Hospitals · Denton, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 75457 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mark Hamilton's NPI number?
The NPI number for Mark Hamilton is 1689889255. It was assigned to this individual provider in the NPPES registry on May 14, 2007.
Where is Mark Hamilton located?
Mark Hamilton practices at 500 Highway 37 S, Mt Vernon, TX 75457. The listed phone number is (903) 537-8000.
What is Mark Hamilton's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mark Hamilton enrolled in Medicare?
Yes. Mark Hamilton is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Mark Hamilton's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Hamilton reassigns Medicare benefits to 5 organizations: Century Integrated Partners, Inc (Dallas, TX), Hospital Care Consultants, Inc (Mcalester, OK), Concord Medical Group PLLC (Lubbock, TX), Concord Medical Group Of Texas PLLC (Lubbock, TX) and Hospital Care Consultants Of Corpus Christi (Corpus Christi, TX). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Hamilton's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mark Hamilton accept?
Health plans from Baylor Scott and White Health Plan, Blue Cross and Blue Shield of Texas, Oscar Health and Oscar Insurance Company list Mark Hamilton as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mark Hamilton affiliated with any hospitals?
According to CMS data, Mark Hamilton is affiliated with South Texas Spine And Surgical Hospital and The Heart Hospital Baylor Denton.
When was this NPI record last updated?
The NPPES record for Mark Hamilton was last updated on January 4, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Mark J Hamilton, MD · NPI 1689889255
Family Medicine physician in Mt Vernon, Texas. Individual provider, active in the CMS NPPES registry since May 14, 2007.
## Identity
- **NPI:** 1689889255 (Entity type: Individual)
- **Enumerated:** May 14, 2007
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** N1667 (Texas)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 500 HIGHWAY 37 S, Mt Vernon, TX 75457-6550
- **Phone:** (903) 537-8000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Century Integrated Partners, Inc (NPI 1447615711, Dallas, TX); Hospital Care Consultants, Inc (NPI 1912945635, Mcalester, OK); Concord Medical Group PLLC (NPI 1083630610, Lubbock, TX); Concord Medical Group Of Texas PLLC (NPI 1750790762, Lubbock, TX); Hospital Care Consultants Of Corpus Christi (NPI 1275088452, Corpus Christi, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Oklahoma College Of Medicine, class of 2007
## Record status
- **NPPES last updated:** January 4, 2011
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Source: [NPI Profile](https://npiprofile.com/npi/1689889255) · Data from the CMS NPPES public registry.