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SHYLA MICHELLE WITTHAUS FNP-BC
NPI 1144684499
Nurse Practitioner - Family in Yorba Linda, CA

Active since April 12, 2016Opted out of Medicare · through Apr 1, 2028
55.29/100
CMS Quality Rating
18300 YORBA LINDA BLVD, YORBA LINDA, CA 92886(714) 577-6000 Get Directions Write a Review

NPPES record last updated: April 20, 2021. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Apr 20, 2021, Jul 21, 2018 (2 updates tracked since 2018).

About Shyla Michelle Witthaus Fnp-bc NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SHYLA MICHELLE WITTHAUS FNP-BC (NPI 1144684499) is an individual family provider in Yorba Linda, California, licensed in Illinois (209.011227) and active in the NPI registry since April 2016. She has opted out of Medicare through April 1, 2028 and maintains a secondary practice location in Lake Villa.

NPPES Registry Identity

NPI1144684499
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameSHYLA MICHELLE WITTHAUSCredential: FNP-BC
Location Address18300 YORBA LINDA BLVDYorba Linda, CA 92886
Mailing Address39924 N Trevino LnAntioch, IL 60002-2320 · (210) 326-0477
Phone(714) 577-6000
Sole ProprietorNo
Enumeration DateApril 12, 2016
Last NPPES UpdateApril 20, 20212 updates tracked since enumeration
NPPES CertifiedApril 20, 2021
✔ NPI 1144684499 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in IL · 209.011227
Also ListedRegistered NurseTaxonomy 163W00000X · License 041.384423 (IL)
18300 YORBA LINDA BLVD, Yorba Linda, CA 92886
Open in Google Maps ↗

Secondary Practice Location 1

Location 1201 S Milwaukee AveLake Villa, IL 60046-8551 · Phone (847) 356-9009

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Shyla Michelle Witthaus Fnp-bc has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from April 1, 2026 through April 1, 2028.

Opt-Out Effective DateApril 1, 2026
Opt-Out In Effect ThroughApril 1, 2028Opt-out affidavits renew automatically every two years unless cancelled

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

55.29/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality5.97
Promoting Interoperability100
Improvement Activities20
Cost64.86

Other Providers at the Same Location NPPES 18

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. CARL WILLIAM BUCKHORN M.D.
Internal Medicine
18300 YORBA LINDA BLVD, STE 204
YORBA LINDA, CA 92886
Orange County (714) 577-6031
DR. GREGG DENICOLA MD
Family Medicine
18300 YORBA LINDA BLVD, SUITE 204
YORBA LINDA, CA 92886
Orange County (714) 577-6031
DANIEL MAY M.D.
Family Medicine
18300 YORBA LINDA BLVD, SUITE 201
YORBA LINDA, CA 92886
Orange County (986) 577-6000
MICHAEL HALL M.D.
Family Medicine
18300 YORBA LINDA BLVD, SUITE 201
YORBA LINDA, CA 92886
Orange County (714) 577-6000
THOMAS BARKER M.D.
Family Medicine
18300 YORBA LINDA BLVD, SUITE 201
YORBA LINDA, CA 92886
Orange County (714) 577-6000
PAUL JORDAN M.D.
Family Medicine
18300 YORBA LINDA BLVD, SUITE 201
YORBA LINDA, CA 92886
Orange County (714) 577-6000
DENNIS PONZIO
Family Medicine
18300 YORBA LINDA BLVD, SUITE 201
YORBA LINDA, CA 92886
Orange County (714) 577-6000
MS. XANDI JACQUELINE CRAIG P.A.
Physician Assistant (Medical)
18300 YORBA LINDA BLVD, SUITE 204
YORBA LINDA, CA 92886
Orange County (714) 577-6031

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Shyla Witthaus's NPI number?

The NPI number for Shyla Witthaus is 1144684499. It was assigned to this individual provider in the NPPES registry on April 12, 2016.

Where is Shyla Witthaus located?

Shyla Witthaus practices at 18300 Yorba Linda Blvd, Yorba Linda, CA 92886. The listed phone number is (714) 577-6000.

What is Shyla Witthaus's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Shyla Witthaus enrolled in Medicare?

No. Shyla Witthaus has opted out of Medicare through April 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out.

When was this NPI record last updated?

The NPPES record for Shyla Witthaus was last updated on April 20, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.