NPIMap

Individual provider Active NPI

Mark William Simon, MD

  • Medical Toxicology (Emergency Medicine) Physician
  • San Diego, CA
National Provider Identifier
1649776584
Registry record updated Aug 21, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Medical Toxicology (Emergency Medicine) PhysicianTaxonomy code 207PT0002X
License
A206785 Issued in CA
Practice address
200 W Arbor Dr
San Diego, CA 92103-9000
Phone
(800) 926-8273
NPI assigned
Mar 31, 2018
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 21, 2026

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

Specialties & licenses 3

Specialty (taxonomy)CodeLicenseStatePrimary
Emergency Medicine Physician 207P00000X A206785 CA
Emergency Medicine Physician 207P00000X DR.0066448 CO
Medical Toxicology (Emergency Medicine) Physician 207PT0002X A206785 CA Primary

Addresses

Primary practice location

200 W Arbor Dr
San Diego, CA 92103-9000

Mailing address

File 57326
Los Angeles, CA 90074-7326
Phone (800) 926-8273

Other practice location 1

8910 Villa La Jolla Dr Ste 100
LA Jolla, CA 92037-1701
Phone (800) 926-8273

Other practice location 2

9300 Campus Point Dr
LA Jolla, CA 92037-1300
Phone (800) 926-8273

Other practice location 3

6655 Alvarado Rd
San Diego, CA 92120-5208
Phone (800) 926-5273

Other practice location 4

3020 Childrens Way
San Diego, CA 92123-4223
Phone (800) 926-8273

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20220103001814 CO Practitioner - Emergency Medicine 4284025149 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Emergency Medicine
Education
Other, 2018
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Poudre Valley Medical Group LLCGroup PAC ID 9638208549, 2,425 clinicians
University Physicians IncorporatedGroup PAC ID 3476465667, 3,189 clinicians

Practice addresses (Care Compare)

11820 Destination Dr
Broomfield, CO 80021-2518
Phone (720) 848-0000

12605 E 16TH Ave
Uchealth Anschutz Medical Campus
Aurora, CO 80045-2545
Phone (720) 848-0000

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
DR.0066448COMDEmergency Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Poudre Valley Medical Group, LLC Current Accepting new patients
Denver Health and Hospital Authority CurrentSince Jun 1, 2022 Accepting new patients
University Physicians Incorporated CurrentSince Jun 1, 2024 Accepting new patients
Poudre Valley Medical Group, LLC CurrentSince Jul 1, 2024 Accepting new patients
University Physicians, Incorporated CurrentSince Jun 1, 2024 Accepting new patients
University Physicians Incorporated Emergency Medicine Current Accepting new patients
Denver Health and Hospital Authority CurrentSince Jun 1, 2022 Accepting new patients

Locations

13123 E 16th Ave
Aurora, CO 80045
Phone (720) 777-3846

12605 E 16th Ave
Aurora, CO 80045
Phone (720) 848-0006

11820 Destination Dr
Broomfield, CO 80021
Phone (303) 460-6000

4404 Barranca Ln
Castle Rock, CO 80104
Phone (720) 733-5260

777 Bannock St
#108
Denver, CO 80204
Phone (303) 602-5176

777 Bannock St
Denver, CO 80204

Dept 1061
Denver, CO 80256

1500 Park Central Dr
Littleton, CO 80129
Phone (720) 516-1000

2695 Rocky Mountain Ave
Ste 150
Loveland, CO 80538
Phone (970) 624-2412

Organizations & group practices 7

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

Hospital & facility affiliations 29

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

View all 29

NPI Registry JSON

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

{
    "created_epoch": "1522454400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787270400000",
    "number": "1649776584",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "FILE 57326",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900747326",
            "telephone_number": "800-926-8273"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "200 W ARBOR DR",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921039000",
            "telephone_number": "800-926-8273"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "8910 Villa La Jolla Dr Ste 100",
            "address_purpose": "LOCATION",
            "city": "LA Jolla",
            "state": "CA",
            "postal_code": "920371701",
            "country_code": "US",
            "telephone_number": "800-926-8273",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "9300 Campus Point Dr",
            "address_purpose": "LOCATION",
            "city": "LA Jolla",
            "state": "CA",
            "postal_code": "920371300",
            "country_code": "US",
            "telephone_number": "800-926-8273",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "6655 Alvarado Rd",
            "address_purpose": "LOCATION",
            "city": "San Diego",
            "state": "CA",
            "postal_code": "921205208",
            "country_code": "US",
            "telephone_number": "800-926-5273",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3020 Childrens Way",
            "address_purpose": "LOCATION",
            "city": "San Diego",
            "state": "CA",
            "postal_code": "921234223",
            "country_code": "US",
            "telephone_number": "800-926-8273",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIMON",
        "first_name": "MARK",
        "middle_name": "WILLIAM",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-03-31",
        "last_updated": "2026-08-21",
        "certification_date": "2026-08-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CA",
            "license": "A206785",
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CO",
            "license": "DR.0066448",
            "primary": false
        },
        {
            "code": "207PT0002X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Medical Toxicology",
            "state": "CA",
            "license": "A206785",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Diego, CA

Sources for this page

Verify at the official NPI Registry.