Individual provider Active NPI

Stephanie Rae Byrne, MD, MPH, MBA

  • Pediatrics Physician
  • Alamo, CA
National Provider Identifier
1821550609
Registry record updated Aug 18, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Pediatrics PhysicianTaxonomy code 208000000X
License
A177273 Issued in CA
Practice address
1505 Saint Alphonsus Way
Alamo, CA 94507-1570
Phone
(925) 838-7337
NPI assigned
Apr 2, 2019
Last updated
Aug 18, 2025By the provider in NPPES
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Aug 18, 2025

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X
Pediatrics Physician 208000000X MD485561 PA
Pediatrics Physician 208000000X A177273 CA Primary

Addresses

Primary practice location

1505 Saint Alphonsus Way
Alamo, CA 94507-1570

Mailing address

1450 Treat Blvd Ste 300
Walnut Creek, CA 94597-2168
Phone (925) 952-2828

Other practice location 1

757 Westwood Plaza
3108 Rrumc
Los Angeles, CA 90095
Phone (310) 267-9132

Other names 1

  • Stephanie Rae Morley Former name

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20220720001990 CA Practitioner - Pediatric Medicine 2860873916 Reassigns benefits to 1 organization

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Master of Business Administration, Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
A177273CAMDPediatrics Physician
MD485561PAMDPediatrics Physician

Practice roles

OrganizationSpecialtyStatusNew patients
John Muir Physician Network Single Specialty CurrentSince Sep 22, 2025 Accepting new patients
Cedars-Sinai Medical Center Single Specialty PastSince Aug 1, 2022 Accepting new patients

Locations

1505 Saint Alphonsus Way
Alamo, CA 94507
Phone (925) 837-4225

2400 Balfour Rd
Ste 120
Brentwood, CA 94513
Phone (925) 308-8112

1450 Treat Blvd
Ste 300
Walnut Creek, CA 94597

Interoperability endpoints

  • Direct secure messaging: smorley223024@direct.cshs.org

Organizations & group practices 2

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

NPI Registry JSON

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

{
    "created_epoch": "1554163200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755475200000",
    "number": "1821550609",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1450 TREAT BLVD STE 300",
            "city": "WALNUT CREEK",
            "state": "CA",
            "postal_code": "945972168",
            "telephone_number": "925-952-2828"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1505 SAINT ALPHONSUS WAY",
            "city": "ALAMO",
            "state": "CA",
            "postal_code": "945071570",
            "telephone_number": "925-838-7337"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "757 Westwood Plaza",
            "address_2": "3108 RRUMC",
            "address_purpose": "LOCATION",
            "city": "Los Angeles",
            "state": "CA",
            "postal_code": "90095",
            "country_code": "US",
            "telephone_number": "310-267-9132",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BYRNE",
        "first_name": "STEPHANIE",
        "middle_name": "RAE",
        "credential": "MD, MPH, MBA",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2019-04-02",
        "last_updated": "2025-08-18",
        "certification_date": "2025-08-18",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "PA",
            "license": "MD485561",
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "CA",
            "license": "A177273",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "STEPHANIE",
            "last_name": "MORLEY",
            "middle_name": "RAE",
            "credential": "MD, MPH, MBA",
            "code": "1",
            "type": "Former Name"
        }
    ]
}

Other providers in Alamo, CA

Sources for this page

Verify at the official NPI Registry.