Individual provider Active NPI

Alexander Stempel

  • Physician Assistant
  • Madera, CA
National Provider Identifier
1659764611
Registry record updated Dec 22, 2023
On this page

Key facts

NPPES NPI Registry
Primary specialty
Physician AssistantTaxonomy code 363A00000X
License
52363 Issued in CA
Practice address
1250 E Almond Ave
Madera, CA 93637-5606
Phone
(559) 675-5555
NPI assigned
Mar 13, 2015
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 22, 2023

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Physician Assistant 363A00000X 52363 CA Primary

Addresses

Primary practice location

1250 E Almond Ave
Madera, CA 93637-5606

Mailing address

4337 Whittle Ave
Oakland, CA 94602-2547

Electronic endpoints 1

TypeEndpointUseAffiliation
SOAP URL https://careepicwest.kp.org:14430/Interconnect-prodcalgateway/wcf/epic.community.hie/xcpdrespondinggatewaysync.svc/scalceq Health Information Exchange (HIE) Southern California Permanente Medical Group

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: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20150513002044 CA Practitioner - Physician Assistant 4284954330 Reassigns benefits to 5 organizations

Care Compare profile

Medicare Care Compare
Specialty
Physician Assistant
Education
Other, 2014
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Permanente Medical Group IncGroup PAC ID 8921910225, 10,928 clinicians
Sharp Rees-Stealy Medical Group IncGroup PAC ID 8628972759, 872 clinicians

Practice addresses (Care Compare)

1 Quality Dr
Vacaville, CA 95688-9494
Phone (707) 624-4000

10243 Genetic Ctr Dr
San Diego, CA 92121-6310
Phone (858) 499-2600

1400 E Palomar St
Chula Vista, CA 91913-1800
Phone (858) 499-2600

16950 Via Tazon
San Diego, CA 92127-1607
Phone (858) 499-2600

8701 Cuyamaca St
Santee, CA 92071-4253
Phone (858) 499-2600

Merit-based Incentive Payment System (MIPS)

Final score
88.67 of 100Reported as group
Quality
81.04
Promoting interoperability
99
Improvement activities
40
Cost
82.04

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Physician Assistant

Practice roles

OrganizationSpecialtyStatusNew patients
Southern California Permanente Medical Group CurrentSince Oct 29, 2025 Accepting new patients
Cep America - California CurrentSince Apr 1, 2015 Accepting new patients
Cep America-California CurrentSince Apr 1, 2015 Accepting new patients
Sharp Rees-Stealy Medical Group, Inc Physician Assistant CurrentSince Jul 29, 2023 Accepting new patients
Southern California Permanente Medical Group CurrentSince Oct 29, 2025 Accepting new patients
Sharp Rees-Stealy Medical Group, Inc CurrentSince Jul 29, 2023 Accepting new patients
Carbon Health Primary Care of California PC PastSince Jul 20, 2025 Accepting new patients

Locations

1250 E Almond Ave
Madera, CA 93637
Phone (559) 675-5501

1601 Cummins Dr
Ste D
Modesto, CA 95358
Phone (510) 350-2663

350 Hawthorne Ave
Oakland, CA 94609
Phone (510) 655-4000

2020 Genesee Ave
San Diego, CA 92123
Phone (619) 268-9500

4647 Zion Ave
San Diego, CA 92120
Phone (619) 528-3038

225 N Jackson Ave
San Jose, CA 95116
Phone (408) 347-4051

Interoperability endpoints

  • Direct secure messaging: astempel114370@sharphealthcare.direct-ci.com

Organizations & group practices 11

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": "1426204800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1703203200000",
    "number": "1659764611",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4337 WHITTLE AVE",
            "city": "OAKLAND",
            "state": "CA",
            "postal_code": "946022547"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1250 E ALMOND AVE",
            "city": "MADERA",
            "state": "CA",
            "postal_code": "936375606",
            "telephone_number": "559-675-5555"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "STEMPEL",
        "first_name": "ALEXANDER",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2015-03-13",
        "last_updated": "2023-12-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "CA",
            "license": "52363",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "SOAP",
            "endpointTypeDescription": "SOAP URL",
            "endpoint": "https://careepicwest.kp.org:14430/Interconnect-prodcalgateway/wcf/epic.community.hie/xcpdrespondinggatewaysync.svc/scalceq",
            "affiliation": "Y",
            "endpointDescription": "Carequality",
            "affiliationName": "Southern California Permanente Medical Group",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "C-CDA",
            "address_1": "4647 Zion Ave",
            "city": "San Diego",
            "state": "CA",
            "country_code": "US",
            "postal_code": "921202507",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Madera, CA

Sources for this page

Verify at the official NPI Registry.