Quick answers
- Does Diana Riffe accept Medicare assignment?
- Yes. Medicare's clinician data says Diana Riffe 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 Diana Riffe see?
- In 2024, CMS data shows 359 Original Medicare patients and 368 services for Diana Riffe. This counts Original Medicare only and measures volume, not quality.
- What is Diana Riffe's NPI number?
- 1528381159. 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 Diana Riffe, 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 | 359 |
|---|---|
| Services billed to Medicare | 368 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Anesthesia for other procedure on large bowel using an endoscope (00811)143 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)89 services
- Anesthesia for exam of colon using an endoscope (00812)83 services
- Anesthesia for other procedure on neck area (1 year or older) (00320)30 services
- Anesthesia for procedure on small and large bowel using an endoscope (00813)17 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 pressure73%
- Arthritis41%
- Diabetes31%
- Depression28%
- Anxiety28%
Practice locations
Addresses where Diana Riffe is enrolled with Medicare (CMS data updated October 2, 2026).
- 310 N State of Franklin Rd, Suite 202Johnson City, TN 37604 (423) 434‑3700
Group practices
Medicare enrollment lists Diana Riffe as a member of this group (CMS data updated October 2, 2026).
- Tennessee Valley Anesthesia Associates LLC10 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Tennessee →
Other nurse anesthetists in Johnson City
Clinicians with the same Medicare primary specialty in Johnson City, TN — not a recommendation.
Other clinicians in Tennessee Valley Anesthesia Associates LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| School | Virginia Commonwealth University, School Of Medicine |
| Graduation year | 2009 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528381159 |
| 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