Quick answers
- Does Marissa Humphrey accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa Humphrey 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 Marissa Humphrey see?
- In 2024, CMS data shows 112 Original Medicare patients and 139 services for Marissa Humphrey. This counts Original Medicare only and measures volume, not quality.
- What is Marissa Humphrey's NPI number?
- 1598992794. 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 Marissa Humphrey, 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 | 112 |
|---|---|
| Services billed to Medicare | 139 |
| Different services or procedures | 47 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Anesthesia for other procedure on upper abdomen (00790)15 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%
- Arthritis52%
- Diabetes42%
- Chronic kidney disease36%
- Ischemic heart disease34%
Hospitals where Marissa Humphrey works
Medicare's Facility Affiliation Data lists Marissa Humphrey 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.
- Vail Health HospitalVail, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060096
- Valley View Hospital AssociationGlenwood Springs, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060075
Practice locations
Addresses where Marissa Humphrey is enrolled with Medicare (CMS data updated October 2, 2026).
- 1450 E Valley Rd, Unit 202Basalt, CO 81621 (970) 384‑6940
- 181 W Meadow DrVail, CO 81657 (970) 476‑2451
- 1906 Blake AveGlenwood Spgs, CO 81601 (970) 945‑7564
Group practices
Medicare enrollment lists Marissa Humphrey as a member of these groups (CMS data updated October 2, 2026).
- Anesthesia Partners of Colorado90 clinicians in the group
- Glenwood Anesthesia Professionals, PC23 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Basalt
Clinicians with the same Medicare primary specialty in Basalt, CO — not a recommendation.
Other clinicians in Anesthesia Partners of Colorado
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | New York Medical College |
| Graduation year | 2008 (18 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1598992794 |
| 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