Gandis G. Mazeika, M.D.
Sleep Medicine (Psychiatry & Neurology) Physician · Edmonds, WA
Gandis G. Mazeika, M.D. is a sleep medicine (psychiatry & neurology) physician with a practice address in Edmonds, Washington, and NPI 1679518880, issued on Jun 19, 2006. Check the license (Washington MD00038659, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Gandis G. Mazeika
- Credential
- M.D.
- Primary taxonomy
- Sleep Medicine (Psychiatry & Neurology) Physician 2084S0012X
- License number
- MD00038659 WA
Self-reported in NPPES; status is on the state search - Practice location
- 21701 76TH Ave W Ste 206, Edmonds, WA 98026
- Phone
- (425) 636-2400
- Enumerated
- Jun 19, 2006
- Record last updated
- Oct 12, 2022
- Fax
- (425) 636-2401
- Medicaid ID
- 1110972 WA
- Medicare enrollment
- Enrolled (PECOS I20080226000646); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest sleep medicine (psychiatry & neurology) physician records → All 30 in Washington → Look up another NPI →
Verify Gandis G. Mazeika in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00038659Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average sleep medicine (psychiatry & neurology) physician in 2024
103 Medicare Part D claims for 23 beneficiaries, against an average of 655 among the 377 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Zolpidem Tartrate23 claims
- Gabapentin18 claims
- Sodium Oxybate15 claims
- Ropinirole Hcl11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 77.9 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Gandis G Mazeika MD PSRedmond, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gandis G. Mazeika among 30 sleep medicine (psychiatry & neurology) physician records in Washington
Gandis G. Mazeika, M.D. is one of 30 sleep medicine (psychiatry & neurology) physician records with a practice address in Washington. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 53% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated1993 · median 2002 among the 21 with a school on file
- Record last updated2022 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084S0012X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sleep Medicine (Psychiatry & Neurology) Physician providers in Washington
There are 30 sleep medicine (psychiatry & neurology) physician records in Washington.
All 30 in Washington → Every provider in Edmonds → Sleep Medicine (Psychiatry & Neurology) Physician nationwide →
The 8 sleep medicine (psychiatry & neurology) physician records with the nearest ZIP codes
- Morris Chang, M.D.Issaquah, WA 980291164420428
- Chris Chou, M.D.Kirkland, WA 980341164872651
- Zeyad Morcos, MDKirkland, WA 980341235115361
- Joel Younger, MDKirkland, WA 980341023088127
- Meredith Broderick, M.D.Bellevue, WA 980041578777355
- Stanley Chen, M.D.Bellevue, WA 980041447284849
- Randip Singh, M.D.Bellevue, WA 980041477569630
- Brandon Peters-Mathews, M.D.Seattle, WA 981011295907566
Common questions
What is Gandis G. Mazeika, M.D.'s NPI number?
Gandis G. Mazeika, M.D.'s National Provider Identifier (NPI) is 1679518880, issued on Jun 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gandis G. Mazeika, M.D. located?
The NPPES record lists a practice address at 21701 76TH Ave W Ste 206, Edmonds, WA, 98026. Phone: (425) 636-2400. Providers update this record themselves, so call before visiting.
How can I verify Gandis G. Mazeika, M.D.'s license?
NPPES lists Washington license number MD00038659, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gandis G. Mazeika, M.D. prescribe under Medicare Part D?
In 2024, Gandis G. Mazeika, M.D. had 103 Medicare Part D claims for 23 beneficiaries; the average among sleep medicine (psychiatry & neurology) physician prescribers was 655. Part D covers Medicare prescriptions only.
What is Gandis G. Mazeika, M.D.'s MIPS final score?
The 2023 MIPS final score is 77.9 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.