Quick answers
- Does Marissa Huntsman accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa Huntsman 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 Huntsman see?
- In 2024, CMS data shows 147 Original Medicare patients and 930 services for Marissa Huntsman. This counts Original Medicare only and measures volume, not quality.
- What is Marissa Huntsman's NPI number?
- 1366706921. 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 Huntsman, 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 | 147 |
|---|---|
| Services billed to Medicare | 930 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)593 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)184 services
- Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes (99309)89 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)50 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%
- Diabetes61%
- Heart failure61%
- Chronic kidney disease59%
- Anxiety58%
Hospitals where Marissa Huntsman works
Medicare's Facility Affiliation Data lists Marissa Huntsman 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.
- Round Rock Medical CenterRound Rock, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450718
Practice locations
Addresses where Marissa Huntsman is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 10; the Medicare profile lists all.
- 1201 W Louis Henna BlvdAustin, TX 78681 (512) 248‑7000
- 12221 N Mopac ExpyAustin, TX 78758 (512) 901‑2530
- 12221 N Mopac Expy, Department of Laboratory ServicesAustin, TX 78758 (512) 901‑1111
- 12221 N Mopac Expy, St. David'S North Austin Medical CenterAustin, TX 78758 (512) 901‑2530
- 1330 Wonder World Dr, Suite 101San Marcos, TX 78666 (512) 805‑0680
Group practices
Medicare enrollment lists Marissa Huntsman as a member of this group (CMS data updated October 2, 2026).
- The Austin Diagnostic Clinic PLLC86 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Austin
Clinicians with the same Medicare primary specialty in Austin, TX — not a recommendation.
Other clinicians in The Austin Diagnostic Clinic PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366706921 |
| 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