Quick answers
- Does James W. Karr Iii accept Medicare assignment?
- Yes. Medicare's clinician data says James W. Karr Iii 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 James W. Karr Iii see?
- In 2024, CMS data shows 227 Original Medicare patients and 240 services for James W. Karr Iii. This counts Original Medicare only and measures volume, not quality.
- What is James W. Karr Iii's NPI number?
- 1689958613. 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 James W. Karr Iii, 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 | 227 |
|---|---|
| Services billed to Medicare | 240 |
| Different services or procedures | 56 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)52 services
- Anesthesia for other procedure on large bowel using an endoscope (00811)45 services
- Anesthesia for procedure on small and large bowel using an endoscope (00813)22 services
- Anesthesia for other procedure on upper abdomen (00790)13 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%
- Arthritis56%
- Ischemic heart disease50%
- Diabetes44%
- Anxiety37%
Hospitals where James W. Karr Iii works
Medicare's Facility Affiliation Data lists James W. Karr Iii 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.
- Houston Methodist Willowbrook HospitalHouston, TX · Acute Care Hospital · Medicare rating: 5 of 5 stars · CCN 450844
Practice locations
Addresses where James W. Karr Iii is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Medical DrLake Jackson, TX 77566 (713) 496‑7555
- 18220 Tomball PkwyHouston, TX 77070 (713) 620‑4000
- 7600 Beechnut StHouston, TX 77074 (713) 620‑4000
Group practices
Medicare enrollment lists James W. Karr Iii as a member of this group (CMS data updated October 2, 2026).
- U S Anesthesia Partners of Texas, PA2,752 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Texas →
Other nurse anesthetists in Lake Jackson
Clinicians with the same Medicare primary specialty in Lake Jackson, TX — not a recommendation.
Other clinicians in U S Anesthesia Partners of Texas, PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689958613 |
| 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