Quick answers
- Does Marissa B. Anderson-Chernishof accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa B. Anderson-Chernishof 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 B. Anderson-Chernishof see?
- In 2024, CMS data shows 187 Original Medicare patients and 238 services for Marissa B. Anderson-Chernishof. This counts Original Medicare only and measures volume, not quality.
- What is Marissa B. Anderson-Chernishof's NPI number?
- 1235549957. 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 B. Anderson-Chernishof, 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 | 187 |
|---|---|
| Services billed to Medicare | 238 |
| Different services or procedures | 8 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)136 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)32 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)27 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%
- Arthritis59%
- Ischemic heart disease52%
- Heart failure49%
- Chronic kidney disease44%
Hospitals where Marissa B. Anderson-Chernishof works
Medicare's Facility Affiliation Data lists Marissa B. Anderson-Chernishof 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.
- Jefferson HealthcarePort Townsend, WA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 501323
- Olympic Medical CenterPort Angeles, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500072
- St Michael Medical CenterSilverdale, WA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 500039
- Tacoma General Allenmore HospitalTacoma, WA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 500129
Practice locations
Addresses where Marissa B. Anderson-Chernishof is enrolled with Medicare (CMS data updated October 2, 2026).
- 10452 Silverdale Way NWSilverdale, WA 98383 (360) 307‑7300
- 2520 Cherry AveBremerton, WA 98310 (360) 377‑3911
- 407 14th Ave SEPuyallup, WA 98372 (253) 697‑4000
Group practices
Medicare enrollment lists Marissa B. Anderson-Chernishof as a member of these groups (CMS data updated October 2, 2026).
- Kaiser Foundation Health Plan of Washington1,526 clinicians in the group
- South Sound Inpatient Physicians PLLC422 clinicians in the group
Specialties
- Internal Medicineprimary
- Hospitalistalso
Other internal medicine doctors in Silverdale
Clinicians with the same Medicare primary specialty in Silverdale, WA — not a recommendation.
Other clinicians in Kaiser Foundation Health Plan of Washington
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1235549957 |
| 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