Barbara C. Yap, MD
Family Medicine Physician · Marysville, WA
Barbara C. Yap, MD is a family medicine physician with a practice address in Marysville, Washington, and NPI 1306881479, issued on Jun 20, 2006. Check the license (Washington MD00045597, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Barbara C. Yap
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- MD00045597 WA
Self-reported in NPPES; status is on the state search - Practice location
- 4404 80TH St NE, Marysville, WA 98270
- Phone
- (360) 659-1231
- Enumerated
- Jun 20, 2006
- Record last updated
- Dec 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 8436594 WA
- Medicare enrollment
- Enrolled (PECOS I20071203000274); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,534 in Washington → Look up another NPI →
Also registered at 4404 80TH St NE
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Haley Anthes, ARNP, NP-CFamily Nurse Practitioner1083353841
- Joyce Burt, ARNPNurse Practitioner1336393222
- Harold Clark, MDFamily Medicine Physician1831194745
- Rachel Dawson, MDFamily Medicine Physician1356363162
- Susana Escobar, MDFamily Medicine Physician1891896262
- Jesseca Eskander, FNP-CFamily Nurse Practitioner1184265316
Verify Barbara C. Yap in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00045597Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% more Medicare Part D claims than the average family medicine physician in 2024
6,111 Medicare Part D claims for 718 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 261 claims were for opioids.
Most prescribed
- Atorvastatin Calcium474 claims
- Amlodipine Besylate300 claims
- Losartan Potassium300 claims
- Levothyroxine Sodium276 claims
- Lisinopril268 claims
- Hydrochlorothiazide209 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
- Permanente Medical Group IncRedwood City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Barbara C. Yap among 5,534 family medicine physician records in Washington
Barbara C. Yap, 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
- Graduated1995 · median 2009 among the 3,294 with a school on file
- Record last updated2021 · 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).
42 family medicine physician records list a practice address in Marysville
They are 42 of the 874 NPPES records with a practice address in Marysville, and 5,534 family medicine physician records in Washington.
All 5,534 in Washington → Every provider in Marysville → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Christopher Beard, MDMarysville, WA 982701144296575
- Barron Brown, MDMarysville, WA 982701922055300
- Kavitha Chunchu, MDMarysville, WA 982701770595019
- Harold Clark, MDMarysville, WA 982701831194745
- Rachel Dawson, MDMarysville, WA 982701356363162
- Evangeline Erskine, MDMarysville, WA 982701801948039
- Susana Escobar, MDMarysville, WA 982701891896262
- Suzanne Fiala, MDMarysville, WA 982701841373818
Common questions
What is Barbara C. Yap, MD's NPI number?
Barbara C. Yap, MD's National Provider Identifier (NPI) is 1306881479, issued on Jun 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Barbara C. Yap, MD located?
The NPPES record lists a practice address at 4404 80TH St NE, Marysville, WA, 98270. Phone: (360) 659-1231. Providers update this record themselves, so call before visiting.
How can I verify Barbara C. Yap, MD's license?
NPPES lists Washington license number MD00045597, 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 Barbara C. Yap, MD prescribe under Medicare Part D?
In 2024, Barbara C. Yap, MD had 6,111 Medicare Part D claims for 718 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.