Quick answers
- Does Halliday C. McDonald accept Medicare assignment?
- Yes. Medicare's clinician data says Halliday C. McDonald 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 Halliday C. McDonald see?
- In 2024, CMS data shows 412 Original Medicare patients and 2,166 services for Halliday C. McDonald. This counts Original Medicare only and measures volume, not quality.
- What is Halliday C. McDonald's NPI number?
- 1285835603. 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 Halliday C. McDonald, 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 | 412 |
|---|---|
| Services billed to Medicare | 2,166 |
| Different services or procedures | 44 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)517 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)481 services
- Biopsy of related skin growth, first growth (11102)306 services
- Destruction of precancer skin growth, 1 growth (17000)239 services
- Destruction of skin growth, 1-14 growths (17110)103 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 cholesterol75%
- High blood pressure56%
- Arthritis39%
- Ischemic heart disease30%
- Osteoporosis19%
- Atrial fibrillation17%
Practice locations
Addresses where Halliday C. McDonald is enrolled with Medicare (CMS data updated October 2, 2026).
- 102 Westlake DrAustin, TX 78746
- 102 Westlake Dr, Suite 100West Lake Hills, TX 78746 (512) 327‑7779
Group practices
Medicare enrollment lists Halliday C. McDonald as a member of this group (CMS data updated October 2, 2026).
- Central Texas Dermatology PA7 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Other clinicians in Central Texas Dermatology PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Southwestern Medical School At Dallas |
| Graduation year | 2005 (21 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1285835603 |
| 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