Quick answers
- Does Louie Tsiktsiris accept Medicare assignment?
- Yes. Medicare's clinician data says Louie Tsiktsiris 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 Louie Tsiktsiris see?
- In 2024, CMS data shows 428 Original Medicare patients and 2,301 services for Louie Tsiktsiris. This counts Original Medicare only and measures volume, not quality.
- What is Louie Tsiktsiris's NPI number?
- 1720086168. 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 Louie Tsiktsiris, 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 | 428 |
|---|---|
| Services billed to Medicare | 2,301 |
| Different services or procedures | 57 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Dxa bone density measurement of hip, pelvis, spine (77080)288 services
- Insertion of needle into vein for collection of blood sample (36415)251 services
- Measurement c-reactive protein for detection of infection or inflammation (86140)183 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)147 services
- Red blood cell sedimentation rate, to detect inflammation, automated (85652)142 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 cholesterol58%
- High blood pressure57%
- Arthritis56%
- Osteoporosis40%
- Depression22%
- Chronic kidney disease22%
Practice locations
Addresses where Louie Tsiktsiris is enrolled with Medicare (CMS data updated October 2, 2026).
- 3901 Hoyt AveEverett, WA 98201 (425) 339‑5442
Group practices
Medicare enrollment lists Louie Tsiktsiris as a member of this group (CMS data updated October 2, 2026).
- Optum Care Washington PLLC683 clinicians in the group
Specialties
- Rheumatologyprimary
Other rheumatologists in Everett
Clinicians with the same Medicare primary specialty in Everett, WA — not a recommendation.
Other clinicians in Optum Care Washington PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1720086168 |
| 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