Quick answers
- Does Nynke C. Den Hollander accept Medicare assignment?
- Yes. Medicare's clinician data says Nynke C. Den Hollander 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 Nynke C. Den Hollander see?
- In 2024, CMS data shows 65 Original Medicare patients and 100 services for Nynke C. Den Hollander. This counts Original Medicare only and measures volume, not quality.
- What is Nynke C. Den Hollander's NPI number?
- 1124271812. 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 Nynke C. Den Hollander, 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 | 65 |
|---|---|
| Services billed to Medicare | 100 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)35 services
- Hospital discharge day management, more than 30 minutes (99239)26 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)17 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)11 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%
- Arthritis62%
- Heart failure60%
- Chronic kidney disease58%
- Ischemic heart disease52%
Hospitals where Nynke C. Den Hollander works
Medicare's Facility Affiliation Data lists Nynke C. Den Hollander at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Columbus Community HospitalColumbus, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 450370
- Memorial Hermann - Texas Medical CenterHouston, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · CCN 450068
- Memorial Hermann Katy HospitalKaty, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450847
Practice locations
Addresses where Nynke C. Den Hollander is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 8; the Medicare profile lists all.
- 17500 W Grand Pkwy SSugar Land, TX 77479 (281) 725‑5026
- 17500 W Grand Pkwy S, Suite 283Sugar Land, TX 77479 (281) 725‑5026
- 1801 N Loop W, Suite 30Houston, TX 77008 (713) 802‑9781
- 23900 Katy FwyKaty, TX 77494 (281) 644‑8111
- 27800 Northwest FwyCypress, TX 77433 (346) 231‑5887
Group practices
Medicare enrollment lists Nynke C. Den Hollander as a member of this group (CMS data updated October 2, 2026).
- Memorial Hermann Medical Group762 clinicians in the group
Specialties
- Hospitalistprimary
- Internal Medicinealso
Other hospitalists in Sugar Land
Clinicians with the same Medicare primary specialty in Sugar Land, TX — not a recommendation.
Other clinicians in Memorial Hermann Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2007 (19 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1124271812 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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