Active NPI
Patrick W Diesfeld MD a Professional Corporation
Doing business as Women's Health Group of Ventura
- Obstetrics & Gynecology Physician
- Ventura, CA
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Obstetrics & Gynecology Physician
- Legal business name
- PATRICK W DIESFELD MD A PROFESSIONAL CORPORATION
- Doing business as
- Women's Health Group of Ventura
- Practice address
- 168 N Brent St Ste 407
Ventura, CA 93003-2824 - Phone
- (805) 648-2717
- Fax
- (805) 648-2023
- NPI assigned
- Mar 21, 2024
- Last updated
- Sep 2, 2025
- Organization subpart
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Authorized official
- Name
- Patrick Diesfeld, MD
- Title
- Doctor
- Phone
- (805) 648-2717
Authorized official NPPES reports the official by name only. The link goes to the one practitioner with that name whose NPPES practice address or phone number is this organization’s.
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Obstetrics & Gynecology Physician | 207V00000X | Primary |
Addresses
Primary practice location
168 N Brent St Ste 407
Ventura, CA 93003-2824
Mailing address
168 N Brent St Ste 407
Ventura, CA 93003-2824
Phone (805) 648-7127
Other names 1
- Women's Health Group of Ventura
Laboratory certificates & supplier records
Derived by NPIMapThese CMS records do not include an NPI. They are shown because their name and street address match this provider’s.
CLIA laboratory certificates
| CLIA number | Laboratory | Certificate | Expires |
|---|---|---|---|
| 05D0936879 | Patrick Diesfeld, MD | Provider-performed microscopy | May 15, 2027 |
National Provider Directory
National Provider DirectoryLocations
110 W Harvard Blvd
Ste D
Santa Paula, CA 93060
Phone (805) 648-2717
Practitioners & affiliated clinicians
Practitioners 1
Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.
-
- Obstetrics & Gynecology Physician
- Ventura, CA
- NPI 1568576080
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1710979200000",
"enumeration_type": "NPI-2",
"last_updated_epoch": "1756771200000",
"number": "1598525909",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "168 N BRENT ST STE 407",
"city": "VENTURA",
"state": "CA",
"postal_code": "930032824",
"telephone_number": "805-648-7127",
"fax_number": "805-648-2023"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "168 N BRENT ST STE 407",
"city": "VENTURA",
"state": "CA",
"postal_code": "930032824",
"telephone_number": "805-648-2717",
"fax_number": "805-648-2023"
}
],
"practiceLocations": [],
"basic": {
"organization_name": "PATRICK W DIESFELD MD A PROFESSIONAL CORPORATION",
"organizational_subpart": "NO",
"enumeration_date": "2024-03-21",
"last_updated": "2025-09-02",
"certification_date": "2024-07-02",
"status": "A",
"authorized_official_last_name": "DIESFELD",
"authorized_official_first_name": "PATRICK",
"authorized_official_title_or_position": "DOCTOR",
"authorized_official_telephone_number": "805-648-2717",
"authorized_official_credential": "MD"
},
"taxonomies": [
{
"code": "207V00000X",
"taxonomy_group": "193400000X SINGLE SPECIALTY GROUP",
"desc": "Obstetrics & Gynecology",
"state": null,
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": [
{
"organization_name": "Women's Health Group of Ventura",
"code": "3",
"type": "Doing Business As"
}
]
}
Other providers in Ventura, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 2, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.