Quick answers
- Does Ariana W. Greenwood accept Medicare assignment?
- Yes. Medicare's clinician data says Ariana W. Greenwood 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 Ariana W. Greenwood see?
- In 2024, CMS data shows 180 Original Medicare patients and 280 services for Ariana W. Greenwood. This counts Original Medicare only and measures volume, not quality.
- What is Ariana W. Greenwood's NPI number?
- 1548307804. 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 Ariana W. Greenwood, 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 | 180 |
|---|---|
| Services billed to Medicare | 280 |
| Different services or procedures | 23 |
| Participating Medicare provider | Yes |
| Average age of these patients | 71 |
Most frequent services
- Biopsy of large bowel using a flexible endoscope (45380)72 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)41 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)38 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)31 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)19 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 cholesterol67%
- High blood pressure46%
- Arthritis46%
- Anxiety25%
- Osteoporosis24%
- Depression23%
Hospitals where Ariana W. Greenwood works
Medicare's Facility Affiliation Data lists Ariana W. Greenwood 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.
- AdventHealth AvistaLouisville, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 060103
Practice locations
Addresses where Ariana W. Greenwood is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Health Park DrLouisville, CO 80027 (303) 643‑1159
- 2535 S Downing StDenver, CO 80210 (303) 778‑5797
- 7750 S Broadway, 260 South Denver NeurosurgeryLittleton, CO 80122 (303) 734‑8650
- 80 Health Park DrLouisville, CO 80027
Group practices
Medicare enrollment lists Ariana W. Greenwood as a member of this group (CMS data updated October 2, 2026).
- Portercare Adventist Health System774 clinicians in the group
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Other clinicians in Portercare Adventist Health System
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Vermont College Of Medicine |
| Graduation year | 2006 (20 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) | 1548307804 |
| 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