Active NPI
Jo Merriwether Knatz, MD
- Gynecology Physician
- Mesa, AZ
National Provider Identifier
1225031503
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Gynecology Physician
- License
- MD16756
- Practice address
- 4540 E Baseline Rd
Ste 115
Mesa, AZ 85206-4617 - Phone
- (480) 610-5300
- Fax
- (480) 610-5340
- NPI assigned
- May 31, 2005
- 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 |
|---|---|---|---|---|
| Gynecology Physician | 207VG0400X | MD16756 | AZ | Primary |
Addresses
Primary practice location
4540 E Baseline Rd
Ste 115
Mesa, AZ 85206-4617
Mailing address
4540 E Baseline Rd
Ste 115
Mesa, AZ 85206-4617
Phone (480) 610-5300
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)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 16756 | AZ | MD | Professional Counselor |
| MD16756 | AZ | MD | Gynecology Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1117497600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1225031503",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "4540 E BASELINE RD",
"address_2": "STE 115",
"city": "MESA",
"state": "AZ",
"postal_code": "852064617",
"telephone_number": "480-610-5300",
"fax_number": "480-610-5340"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "4540 E BASELINE RD",
"address_2": "STE 115",
"city": "MESA",
"state": "AZ",
"postal_code": "852064617",
"telephone_number": "480-610-5300",
"fax_number": "480-610-5340"
}
],
"practiceLocations": [],
"basic": {
"last_name": "KNATZ",
"first_name": "JO",
"middle_name": "MERRIWETHER",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2005-05-31",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207VG0400X",
"taxonomy_group": "",
"desc": "Obstetrics & Gynecology, Gynecology",
"state": "AZ",
"license": "MD16756",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Mesa, AZ
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.