Shyla Michelle Witthaus, FNP-BC

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

209.011227 Issued in IL

Practice address

18300 Yorba Linda Blvd
Yorba Linda, CA 92886

Phone

(714) 577-6000

NPI assigned

Apr 12, 2016

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Opted out of Medicare

Yes, effective Apr 1, 2026 through Apr 1, 2028

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: switthaus1156629@oc.providencedirect.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Yorba Linda Family Physicians, a Medical Group, Inc.

  • Family Medicine Physician
  • Yorba Linda, CA
  • NPI 1295782423
  NPD (past)

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1460419200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1618876800000",
    "number": "1144684499",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "39924 N TREVINO LN",
            "city": "ANTIOCH",
            "state": "IL",
            "postal_code": "600022320",
            "telephone_number": "210-326-0477"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18300 YORBA LINDA BLVD",
            "city": "YORBA LINDA",
            "state": "CA",
            "postal_code": "92886",
            "telephone_number": "714-577-6000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "201 S Milwaukee Ave",
            "address_purpose": "LOCATION",
            "city": "Lake Villa",
            "state": "IL",
            "postal_code": "600468551",
            "country_code": "US",
            "telephone_number": "847-356-9009",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WITTHAUS",
        "first_name": "SHYLA",
        "middle_name": "MICHELLE",
        "credential": "FNP-BC",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2016-04-12",
        "last_updated": "2021-04-20",
        "certification_date": "2021-04-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "IL",
            "license": "041.384423",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "IL",
            "license": "209.011227",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "switthaus1156629@oc.providencedirect.org",
            "affiliation": "N",
            "address_1": "1826 W Orangethorpe Ave",
            "city": "Fullerton",
            "state": "CA",
            "country_code": "US",
            "postal_code": "928334406",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Wendy McInerney Williams, RDHAP
• Joseph Isaiah Willis, M.D.
• Christine Renee Wilson, MD
• Terry Wayne Wilson, D.C.
• Teresa Marie Wisner, DC
• Allison Elizabeth Wolf, PT, DPT
• Natalie Wolfinger, LMFT
• Michelle Katherine Wood, OTR/L
• Hannah Kay Woods
• Jessica Worley, M.A. CCC-SLP

• Family Nurse Practitioner in Yorba Linda, CA
• Providers in Yorba Linda, CA by specialty
• Family Nurse Practitioner in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 20, 2021; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.