Charles Jacob Mayer, MD
Family Medicine Physician · Seattle, WA
Charles Jacob Mayer, MD is a family medicine physician with a practice address in Seattle, Washington, and NPI 1487739298, issued on Oct 27, 2006. Check the license (Washington MD00031331, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Charles Jacob Mayer
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- MD00031331 WA
DR.0067844 CO
Self-reported in NPPES; status is on the state search - Practice location
- 1420 5TH Ave Ste 375, Seattle, WA 98101
- Phone
- (206) 223-2611
- Enumerated
- Oct 27, 2006
- Record last updated
- Apr 14, 2022
- Medicaid ID
- 8182313 WA
- Medicare enrollment
- Enrolled (PECOS I20050705000802); accepts Medicare assignment
- Medical or professional school
- Howard University College Of Medicine, 1991
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 1420 5TH Ave Ste 375
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Melissa SzocikMedical Physician Assistant1144372228
Verify Charles Jacob Mayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00031331Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average family medicine physician in 2024
279 Medicare Part D claims for 181 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Paxlovid31 claims
- Alvesco13 claims
- Prednisone13 claims
- Fluconazole11 claims
- Lisinopril11 claims
- Midodrine 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.
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF WashingtonSeattle, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Charles Jacob Mayer among 5,534 family medicine physician records in Washington
Charles Jacob Mayer, MD is one of 5,534 family medicine physician records with a practice address in Washington. 73% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1991 · median 2009 among the 3,294 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 207Q00000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
871 family medicine physician records list a practice address in Seattle
They are 871 of the 41,956 NPPES records with a practice address in Seattle, and 5,534 family medicine physician records in Washington.
All 5,534 in Washington → Every provider in Seattle → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Dennis Anderson, DOSeattle, WA 981011386689628
- Erika Bliss, M.D.Seattle, WA 981011972581031
- Katherine Brown, M.D.Seattle, WA 981011952377335
- Courtney Canavera, M.D.Seattle, WA 981011639254576
- Edward Conklin, M.D.Seattle, WA 981011467537365
- Lindy Griffin, D.O.Seattle, WA 981011912906439
- Jennie Huang, MDSeattle, WA 981011316936891
- Darla Klokeid, M.D.Seattle, WA 981011699745687
Common questions
What is Charles Jacob Mayer, MD's NPI number?
Charles Jacob Mayer, MD's National Provider Identifier (NPI) is 1487739298, issued on Oct 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Charles Jacob Mayer, MD located?
The NPPES record lists a practice address at 1420 5TH Ave Ste 375, Seattle, WA, 98101. Phone: (206) 223-2611. Providers update this record themselves, so call before visiting.
How can I verify Charles Jacob Mayer, MD's license?
NPPES lists Washington license number MD00031331, 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 Charles Jacob Mayer, MD prescribe under Medicare Part D?
In 2024, Charles Jacob Mayer, MD had 279 Medicare Part D claims for 181 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
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.