Active NPI
Mary Ellen Watts
- Critical Care Medicine Registered Nurse
- Scottsdale, AZ
National Provider Identifier
1124996533
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Critical Care Medicine Registered Nurse
- License
- RN155449
- Practice address
- PO Box 338
Scottsdale, AZ 85252-0338 - Phone
- (480) 589-2738
- NPI assigned
- Oct 27, 2025
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Critical Care Medicine Registered Nurse | 163WC0200X | RN155449 | AZ | Primary |
Addresses
Primary practice location
PO Box 338
Scottsdale, AZ 85252-0338
Mailing address
PO Box 338
Scottsdale, AZ 85252
Phone (480) 589-2738
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| RN155449 | AZ | MD | Critical Care Medicine Registered Nurse |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1761523200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1761523200000",
"number": "1124996533",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 338",
"city": "SCOTTSDALE",
"state": "AZ",
"postal_code": "85252",
"telephone_number": "480-589-2738"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "PO BOX 338",
"city": "SCOTTSDALE",
"state": "AZ",
"postal_code": "852520338",
"telephone_number": "480-589-2738"
}
],
"practiceLocations": [],
"basic": {
"last_name": "WATTS",
"first_name": "MARY",
"middle_name": "ELLEN",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2025-10-27",
"last_updated": "2025-10-27",
"certification_date": "2025-10-27",
"status": "A"
},
"taxonomies": [
{
"code": "163WC0200X",
"taxonomy_group": "",
"desc": "Registered Nurse, Critical Care Medicine",
"state": "AZ",
"license": "RN155449",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Scottsdale, AZ
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 27, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.