Quick answers
- Does Terri L. Grosshans accept Medicare assignment?
- Yes. Medicare's clinician data says Terri L. Grosshans 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 Terri L. Grosshans see?
- In 2024, CMS data shows 282 Original Medicare patients and 6,904 services for Terri L. Grosshans. This counts Original Medicare only and measures volume, not quality.
- What is Terri L. Grosshans's NPI number?
- 1790904613. 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 Terri L. Grosshans, 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 | 282 |
|---|---|
| Services billed to Medicare | 6,904 |
| Different services or procedures | 59 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Injection, methylprednisolone acetate, 1 mg (J1010)5,922 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)137 services
- Injection of trigger points, 1-2 muscles (20552)129 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)108 services
- Insertion of cage or mesh device to spine bone and disc space during spine fusion (22853)58 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%
- Arthritis75%
- High cholesterol68%
- Diabetes30%
- Depression27%
- Anxiety22%
Hospitals where Terri L. Grosshans works
Medicare's Facility Affiliation Data lists Terri L. Grosshans 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.
- Grays Harbor Community HospitalAberdeen, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500031
- Mason General Hospital & Family of ClinicsShelton, WA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 501336
- Providence Centralia HospitalCentralia, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500019
- Providence St Peter HospitalOlympia, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500024
- Summit Pacific Medical CenterElma, WA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 501304
Practice locations
Addresses where Terri L. Grosshans is enrolled with Medicare (CMS data updated October 2, 2026).
- 3909 9th Ave SWOlympia, WA 98502 (360) 570‑3460
- 615 Lilly Rd NEOlympia, WA 98506 (360) 491‑4211
Group practices
Medicare enrollment lists Terri L. Grosshans as a member of this group (CMS data updated October 2, 2026).
- Olympia Orthopaedic Associates PLLC87 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Olympia
Clinicians with the same Medicare primary specialty in Olympia, WA — not a recommendation.
Other clinicians in Olympia Orthopaedic Associates PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2015 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790904613 |
| 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