Quick answers
- Does Diane R. Keahey accept Medicare assignment?
- Yes. Medicare's clinician data says Diane R. Keahey 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 Diane R. Keahey see?
- In 2024, CMS data shows 91 Original Medicare patients and 1,455 services for Diane R. Keahey. This counts Original Medicare only and measures volume, not quality.
- What is Diane R. Keahey's NPI number?
- 1912013988. 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 Diane R. Keahey, 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 | 91 |
|---|---|
| Services billed to Medicare | 1,455 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 65 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)166 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)120 services
- Management using the results of remote vital sign monitoring per calendar month, each additional 20 minutes (99458)117 services
- Management using the results of remote vital sign monitoring per calendar month, first 20 minutes (99457)91 services
- Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days (99454)40 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 cholesterol74%
- Anxiety49%
- Arthritis43%
- Depression41%
- Diabetes24%
Hospitals where Diane R. Keahey works
Medicare's Facility Affiliation Data lists Diane R. Keahey 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.
- Texoma Medical CenterDenison, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450324
Practice locations
Addresses where Diane R. Keahey is enrolled with Medicare (CMS data updated October 2, 2026).
- 3415 N Heritage PkwySherman, TX 75092 (903) 308‑4336
- 425 N Highland Ave, Suite 120Sherman, TX 75092 (903) 871‑5671
Group practices
Medicare enrollment lists Diane R. Keahey as a member of these groups (CMS data updated October 2, 2026).
- Heritage Parkway Medical PLLC3 clinicians in the group
- Highland Primary Care, LLC3 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Sherman
Clinicians with the same Medicare primary specialty in Sherman, TX — not a recommendation.
Other clinicians in Heritage Parkway Medical PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1912013988 |
| 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