Shyla Michelle Witthaus, FNP-BC
Family Nurse Practitioner · Yorba Linda, CA
Shyla Michelle Witthaus, FNP-BC is a family nurse practitioner with a practice address in Yorba Linda, California, and NPI 1144684499, issued on Apr 12, 2016. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Shyla Michelle Witthaus
- Credential
- FNP-BC
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- 209.011227 IL
041.384423 IL
Self-reported in NPPES; status is on the state search - Practice location
- 18300 Yorba Linda Blvd, Yorba Linda, CA 92886
- Phone
- (714) 577-6000
- Enumerated
- Apr 12, 2016
- Record last updated
- Apr 20, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 18300 Yorba Linda Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeanette Alves, P.A.Medical Physician Assistant1124189618
- Thomas Barker, M.D.Family Medicine Physician1275574097
- Carl Buckhorn, M.D.Internal Medicine Physician1649264847
- Christina Caputo, PAPhysician Assistant1366771891
- Xandi Craig, P.A.Medical Physician Assistant1285735258
- Gregg Denicola, MDFamily Medicine Physician1164469912
Verify Shyla Michelle Witthaus in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 55.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Shyla Michelle Witthaus among 16,966 family nurse practitioner records in California
Shyla Michelle Witthaus, FNP-BC is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 35% of them.
- NPI issued2016 · 35% of these records are older, 60% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2021 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
34 family nurse practitioner records list a practice address in Yorba Linda
They are 34 of the 748 NPPES records with a practice address in Yorba Linda, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Yorba Linda → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Cecilia Aubrey, NURSE PRACTITIONERYorba Linda, CA 928861568946424
- Claudia Biriescu, FNPYorba Linda, CA 928861437575974
- Samantha Buffington, FNPYorba Linda, CA 928861629680087
- Kaylinne Chang, NPYorba Linda, CA 928861083029292
- Brigitte Foster, FNPYorba Linda, CA 928861942707039
- Beth Haney, DNP, FNP-CYorba Linda, CA 928861346340049
- Melissa Kyle, NPYorba Linda, CA 928861720594179
- Shital Patel, FNPYorba Linda, CA 928861093166415
Common questions
What is Shyla Michelle Witthaus, FNP-BC's NPI number?
Shyla Michelle Witthaus, FNP-BC's National Provider Identifier (NPI) is 1144684499, issued on Apr 12, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Shyla Michelle Witthaus, FNP-BC located?
The NPPES record lists a practice address at 18300 Yorba Linda Blvd, Yorba Linda, CA, 92886. Phone: (714) 577-6000. Providers update this record themselves, so call before visiting.
How can I verify Shyla Michelle Witthaus, FNP-BC's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
What is Shyla Michelle Witthaus, FNP-BC's MIPS final score?
The 2023 MIPS final score is 55.3 of 100, reported for the practice group. 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.