Katelin Petrin, CPNP

Primary specialty

Pediatric Nurse PractitionerTaxonomy code 363LP0200X

License

16840-33 Issued in WI

Practice address

800 N Mayfair Rd Ste 200
Wauwatosa, WI 53226-6300

Phone

(414) 262-8835

NPI assigned

Oct 15, 2015

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other names 1

• Katelin Larson Former name

Electronic endpoints 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Certified Pediatric Nurse Practitioner, Nurse Practitioner

State licenses

Interoperability endpoints

• Direct secure messaging: klarson99189@direct.seattlechildrens.org
• Direct secure messaging: katelin.petrin.1@33161.direct.athenahealth.com

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

{
    "created_epoch": "1444867200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776988800000",
    "number": "1013388016",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "800 N MAYFAIR RD STE 200",
            "city": "WAUWATOSA",
            "state": "WI",
            "postal_code": "532266300",
            "telephone_number": "414-262-8835"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "800 N MAYFAIR RD STE 200",
            "city": "WAUWATOSA",
            "state": "WI",
            "postal_code": "532266300",
            "telephone_number": "414-262-8835"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3434 12th Ave NE",
            "address_purpose": "LOCATION",
            "city": "Olympia",
            "state": "WA",
            "postal_code": "98506",
            "country_code": "US",
            "telephone_number": "360-413-8470",
            "fax_number": "360-413-8490",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "PETRIN",
        "first_name": "KATELIN",
        "credential": "CPNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2015-10-15",
        "last_updated": "2026-04-24",
        "certification_date": "2026-04-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LP0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Pediatrics",
            "state": "WI",
            "license": "16840-33",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "katelin.petrin.1@33161.direct.athenahealth.com",
            "affiliation": "N",
            "endpointDescription": "Athena Direct Messaging Email Address",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "Athena Direct Messaging Email Address",
            "address_1": "800 N Mayfair Rd Ste 200",
            "city": "Wauwatosa",
            "state": "WI",
            "country_code": "US",
            "postal_code": "532266300",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "first_name": "KATELIN",
            "last_name": "LARSON",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

• Peterson Lactation Services
• Kimberly Anne Peterson, M.A. CCC-SLP
• Molly G Peterson, BS, IBCLC, RLC
• Tracy M Peterson, NURSE PRACTIONER
• Janelle Marie Petinga, ANP-BC
• Jacquelyn P Petropoulos, PTA
• Michael Anthony Pezewski, PHARMD
• Margaret Pfeiffer, M.S., R.D., C.L.S.
• Lisa Maria Phillips, FNP
• Alice M Phipps, CNM, NP

• Pediatric Nurse Practitioner in Wauwatosa, WI
• Providers in Wauwatosa, WI by specialty
• Pediatric Nurse Practitioner in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 24, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.