Quick answers
- Does Gandis G. Mazeika accept Medicare assignment?
- Yes. Medicare's clinician data says Gandis G. Mazeika 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 Gandis G. Mazeika see?
- In 2024, CMS data shows 281 Original Medicare patients and 3,092 services for Gandis G. Mazeika. This counts Original Medicare only and measures volume, not quality.
- What is Gandis G. Mazeika's NPI number?
- 1679518880. 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 Gandis G. Mazeika, 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 | 281 |
|---|---|
| Services billed to Medicare | 3,092 |
| Different services or procedures | 21 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Assessment of emotional or behavioral problems (96127)1,290 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)457 services
- Measurement of brain wave activity (eeg), awake and asleep (95819)247 services
- Device supply with scheduled recording and transmission for remote monitoring of respiratory system, per 30 days (98976)214 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)173 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 cholesterol70%
- High blood pressure67%
- Arthritis46%
- Diabetes27%
- Depression27%
- Anxiety27%
Practice locations
Addresses where Gandis G. Mazeika is enrolled with Medicare (CMS data updated October 2, 2026).
- 16150 NE 85th St, Suite 203Redmond, WA 98052 (425) 636‑2400
Group practices
Medicare enrollment lists Gandis G. Mazeika as a member of this group (CMS data updated October 2, 2026).
- Gandis G Mazeika MD PS2 clinicians in the group
Specialties
- Neurologyprimary
Other neurologists in Washington
Clinicians with the same Medicare primary specialty in Washington — not a recommendation.
Other clinicians in Gandis G Mazeika MD PS
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Davis School Of Medicine |
| 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) | 1679518880 |
| 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