Quick answers
- Does William R. McKenna accept Medicare assignment?
- Yes. Medicare's clinician data says William R. McKenna 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 William R. McKenna see?
- In 2024, CMS data shows 107 Original Medicare patients and 13,321 services for William R. McKenna. This counts Original Medicare only and measures volume, not quality.
- What is William R. McKenna's NPI number?
- 1164446399. 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 William R. McKenna, 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 | 107 |
|---|---|
| Services billed to Medicare | 13,321 |
| Different services or procedures | 35 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Administration of non-hormonal anti-neoplastic chemotherapy under skin or into muscle (96401)156 services
- Injection of drug or substance under skin or into muscle (96372)106 services
- Test to measure expiratory airflow and volume (94010)80 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)65 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)53 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%
- Asthma55%
- Arthritis49%
- Diabetes36%
- COPD36%
Practice locations
Addresses where William R. McKenna is enrolled with Medicare (CMS data updated October 2, 2026).
- 1713 Treasure Hills Blvd, 1bHarlingen, TX 78550 (956) 425‑9240
Group practices
Medicare enrollment lists William R. McKenna as a member of this group (CMS data updated October 2, 2026).
- William R McKenna MD PA2 clinicians in the group
Specialties
- Allergy/Immunologyprimary
Other allergist and immunologists in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Other clinicians in William R McKenna MD PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Texas Tech University Health Science Center School Of Medicine |
| Graduation year | 1977 (49 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1164446399 |
| 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