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DR. THOMAS S. PARKER M.D.
NPI 1962558056
Internal Medicine in San Marcos, TX

Active since January 25, 2007PECOS Enrolled
1301 WONDER WORLD DR, SAN MARCOS, TX 78666(512) 353-8979 Get Directions Write a Review

NPPES record last updated: August 23, 2024. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Thomas S. Parker M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. THOMAS S. PARKER M.D. (NPI 1962558056) is an individual internal medicine provider in San Marcos, Texas, licensed in Texas (F1884) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1962558056
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. THOMAS S. PARKERCredential: M.D.
Location Address1301 WONDER WORLD DRSan Marcos, TX 78666-7533
Mailing Address200 Corporate BlvdLafayette, LA 70508-3870 · (800) 893-9698
Phone(512) 353-8979
Sole ProprietorYes
Enumeration DateJanuary 25, 2007
Last NPPES UpdateAugust 23, 2024
NPPES CertifiedAugust 23, 2024
✔ NPI 1962558056 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in TX · F1884
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License F1884 (TX)
1301 WONDER WORLD DR, San Marcos, TX 78666
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Other Identifiers 1

Other0096NKTX · Bcbs Of Tx

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Thomas S. Parker M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

7

Medicare enrollment records show Thomas Parker reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

South Texas Physician Services, PLLC
14 mi
Internal Medicine
600 N UNION AVE
New Braunfels, TX 78130
  • Reassigned Medicare billing, Texas enrollment
  • 101 clinicians in this Medicare group
NPI 1598546772 (830) 606-9111
Hni Medical Services
28 mi
Hospitalist
7500 RIALTO BLVD STE 1-140
Austin, TX 78735
  • Reassigned Medicare billing, Texas enrollment
  • 241 clinicians in this Medicare group
NPI 1366735169 (512) 730-3060
Victoria Emergency Partners LLC
39 mi
Emergency Medicine
1110 N SARAH DEWITT DR
Gonzales, TX 78629
  • Reassigned Medicare billing, Texas enrollment
  • 430 clinicians in this Medicare group
NPI 1164770996 (830) 672-7581
Victoria Emergency Associates LLC
92 mi
Emergency Medicine
506 E SAN ANTONIO ST
Victoria, TX 77901
  • Reassigned Medicare billing, Texas enrollment
  • 153 clinicians in this Medicare group
NPI 1407917164 (361) 575-7441
Concord Medical Group PLLC
345 mi
Emergency Medicine
1602 AVENUE Q
Lubbock, TX 79401
  • Reassigned Medicare billing, Texas enrollment
  • 1,338 clinicians in this Medicare group
NPI 1083630610 (888) 264-0330
Concord Medical Group Of Texas PLLC
345 mi
Emergency Medicine
1602 AVENUE Q
Lubbock, TX 79401
  • Reassigned Medicare billing, Texas enrollment
  • 1,439 clinicians in this Medicare group
NPI 1750790762 (888) 264-0330
Victoria Hospitalist Associates, LLC
447 mi
Hospitalist
4500 S GARNETT RD, STE 919
Tulsa, OK 74146
  • Reassigned Medicare billing, Texas enrollment
  • 100 clinicians in this Medicare group
NPI 1023236825 (918) 728-6145

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

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.

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
45 services45 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78666 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$126.40 typical visit price
range $54.84 – $166.88
Typical copayment $31.60 (range $13.71 – $41.72)
Most-billed visit code 99204
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KATHERINE ALISON SIDES MD
Emergency Medicine
1301 WONDER WORLD DR, CENTRAL TEXAS MEDICAL CENTER
SAN MARCOS, TX 78666
Hays County (512) 353-8979
ROCKIE LANE DUGGER CRNA
Nurse Anesthetist, Certified Registered
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 353-8979
DOUGLAS S SMITH M.D.
Radiology (Diagnostic Radiology)
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 396-8565
MS. MILDRED SIMON MOZARA CRNA
Nurse Anesthetist, Certified Registered
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 353-8979
COLLEEN HUGHES
Physical Therapist
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 353-8979
RADIOLOGY ASSOCIATES OF SAN MARCOS
Radiology (Diagnostic Radiology)
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 396-8565
JOSE OVIDIO PENA JR. MD
Emergency Medicine
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 753-3796
CAREY MICHELLE SWEET ARNP-C
Nurse Practitioner
1301 WONDER WORLD DR
SAN MARCOS, TX 78666
Hays County (512) 753-3874

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 Thomas Parker's NPI number?

The NPI number for Thomas Parker is 1962558056. It was assigned to this individual provider in the NPPES registry on January 25, 2007.

Where is Thomas Parker located?

Thomas Parker practices at 1301 Wonder World Dr, San Marcos, TX 78666. The listed phone number is (512) 353-8979.

What is Thomas Parker's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Thomas Parker enrolled in Medicare?

Yes. Thomas Parker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Thomas Parker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Thomas Parker reassigns Medicare benefits to 7 organizations: South Texas Physician Services, PLLC (New Braunfels, TX), Hni Medical Services (Austin, TX), Victoria Emergency Partners LLC (Gonzales, TX), Victoria Emergency Associates LLC (Victoria, TX), Concord Medical Group PLLC (Lubbock, TX) and 2 more organizations, listed in the Medicare section above. 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 Thomas Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Thomas Parker accept?

Health plans from Blue Cross and Blue Shield of Texas and CHRISTUS Health Plan list Thomas Parker 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.

When was this NPI record last updated?

The NPPES record for Thomas Parker was last updated on August 23, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.