Nynke Den Hollander, MD
NPI 1124271812 · Hospitalist Physician · Katy, TX
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nynke Den Hollander, MD is a Hospitalist Physician provider in Katy, TX (NPI 1124271812).
Provider details
- NPI number
- 1124271812
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- P1745 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
89 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 35 | $124 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 26 | $119 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 17 | $83 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 11 | $180 |
Typical Medicare-allowed amounts for these services range $83–$180 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 1331 W Grand Pkwy NSuite 230Katy, TX 77493-2710Phone: (281) 392-8620Fax: (281) 392-2258
Registry dates
- Enumerated
- 2008-10-28
- Last updated
- 2026-03-23
- Certified
- 2026-03-23
Frequently asked questions
- What is Nynke Den Hollander's NPI number?
- Nynke Den Hollander's National Provider Identifier (NPI) is 1124271812, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nynke Den Hollander's specialty?
- Nynke Den Hollander is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Nynke Den Hollander located?
- Nynke Den Hollander's practice location on file with NPPES is 23900 Katy Fwy, Katy, TX 77494-1323.
- What is Nynke Den Hollander's phone number?
- The practice phone number listed in the NPPES registry for Nynke Den Hollander is (281) 644-8112.
- Does Nynke Den Hollander accept Medicare?
- Nynke Den Hollander is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nynke Den Hollander's NPI active?
- Yes — Nynke Den Hollander's NPI (1124271812) is active in the NPPES registry as of the last update on 2026-03-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.