Quick answers
- Does Ineke M. Olsthoorn accept Medicare assignment?
- Yes. Medicare's clinician data says Ineke M. Olsthoorn accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Ineke M. Olsthoorn see?
- In 2024, CMS data shows 133 Original Medicare patients and 1,451 services for Ineke M. Olsthoorn. This counts Original Medicare only and measures volume, not quality.
- What is Ineke M. Olsthoorn's NPI number?
- 1497373955. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Ineke M. Olsthoorn, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 133 |
|---|---|
| Services billed to Medicare | 1,451 |
| Different services or procedures | 9 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Administration of psychological or neuropsychological test by technician, each additional 30 minutes (96139)584 services
- Evaluation of neuropsychological test, each additional hour (96133)367 services
- Evaluation of neuropsychological test, first hour (96132)239 services
- Exam of neurobehavioral status, first hour (96116)122 services
- Administration of psychological or neuropsychological test by technician, first 30 minutes (96138)119 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis53%
- Depression44%
- Alzheimer's disease or dementia40%
- Anxiety39%
Practice locations
Addresses where Ineke M. Olsthoorn is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 16605 Southwest FwySugar Land, TX 77479 (281) 275‑0800
- 16605 Southwest Fwy 400 Mob3, Methodist Family Medicine GroupSugar Land, TX 77479 (281) 275‑0800
- 16605 SW Fwy 410, Methodist Diag Card of HoustonSugar Land, TX 77479 (281) 274‑0148
- 16811 Southwest Fwy, Suite 200Sugar Land, TX 77479 (281) 690‑4678
- 17189 I H 45, Suite 505Shenandoah, TX 77385 (936) 270‑4400
Group practices
Medicare enrollment lists Ineke M. Olsthoorn as a member of these groups (CMS data updated October 2, 2026).
- TMH Physician Associates PLLC1,690 clinicians in the group
- Houston Methodist Specialty Physicians1,528 clinicians in the group
Specialties
- Clinical Psychologistprimary
Other clinical psychologists in Sugar Land
Clinicians with the same Medicare primary specialty in Sugar Land, TX — not a recommendation.
Other clinicians in TMH Physician Associates PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1497373955 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians