Quick answers
- Does Marissa Vanguilder accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa Vanguilder 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 Vanguilder see?
- In 2024, CMS data shows 241 Original Medicare patients and 489 services for Marissa Vanguilder. This counts Original Medicare only and measures volume, not quality.
- What is Marissa Vanguilder's NPI number?
- 1578121224. 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 Vanguilder, 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 | 241 |
|---|---|
| Services billed to Medicare | 489 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) (64447)196 services
- Anesthesia for procedure for total knee joint replacement (01402)177 services
- Anesthesia for other procedure or exam of knee joint using an endoscope (01400)20 services
- Anesthesia for other procedure on lower leg, ankle, and foot bones (01480)19 services
- Injection of anesthetic agent and/or steroid into other nerve or branch (64450)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 cholesterol75%
- Arthritis75%
- High blood pressure72%
- Ischemic heart disease22%
- Anxiety20%
- Osteoporosis17%
Practice locations
Addresses where Marissa Vanguilder is enrolled with Medicare (CMS data updated October 2, 2026).
- 860 Oak Park Blvd, Suite 102Arroyo Grande, CA 93420 (805) 474‑6383
Group practices
Medicare enrollment lists Marissa Vanguilder as a member of this group (CMS data updated October 2, 2026).
- MVG Anesthesia Inc a Professional Nursing Corporation2 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), California →
Other nurse anesthetists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1578121224 |
| 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