Quick answers
- Does Diana Oyoung-Oliver accept Medicare assignment?
- Yes. Medicare's clinician data says Diana Oyoung-Oliver 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 Oyoung-Oliver see?
- In 2024, CMS data shows 233 Original Medicare patients and 4,861 services for Diana Oyoung-Oliver. This counts Original Medicare only and measures volume, not quality.
- What is Diana Oyoung-Oliver's NPI number?
- 1932513124. 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 Oyoung-Oliver, 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 | 233 |
|---|---|
| Services billed to Medicare | 4,861 |
| Different services or procedures | 36 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)124 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)120 services
- Measurement of brain wave activity with video (veeg), 12-26 hours with review and report by health care professional (95720)54 services
- New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)48 services
- Measurement of brain wave activity (eeg), awake and drowsy (95816)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 cholesterol70%
- High blood pressure67%
- Arthritis50%
- Depression38%
- Anxiety35%
- Chronic kidney disease30%
Hospitals where Diana Oyoung-Oliver works
Medicare's Facility Affiliation Data lists Diana Oyoung-Oliver 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.
- Longs Peak HospitalLongmont, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060128
- Medical Center of the RockiesLoveland, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060119
- Poudre Valley HospitalFort Collins, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060010
- UCHealth Broomfield HospitalBroomfield, CO · Acute Care Hospital · Emergency services: listed by Medicare · CCN 060129
- UCHealth Greeley HospitalGreeley, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060131
Practice locations
Addresses where Diana Oyoung-Oliver is enrolled with Medicare (CMS data updated October 2, 2026).
- 1925 Mountain View AveLongmont, CO 80501 (303) 776‑1234
Group practices
Medicare enrollment lists Diana Oyoung-Oliver as a member of this group (CMS data updated October 2, 2026).
- Poudre Valley Medical Group LLC2,440 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Longmont
Clinicians with the same Medicare primary specialty in Longmont, CO — not a recommendation.
Other clinicians in Poudre Valley Medical Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Lincoln Memorial University Medical Department |
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1932513124 |
| 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