Marcus Rene Ortiz Jr., PA-C

Primary specialty

Physician AssistantTaxonomy code 363A00000X

License

PA3923 Issued in TN

Practice address

1450 Dowell Springs Blvd Ste 210
Knoxville, TN 37909-2448

Phone

(865) 524-2547

Fax

(865) 205-5601

NPI assigned

Oct 19, 2011

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in TN

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

Specialty

Physician Assistant

Education

University of California, Davis School of Medicine, 2011

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Knoxville Dermatology Group PCGroup PAC ID 8123009636, 29 clinicians

Practice addresses (Care Compare)

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as group

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Physician Assistant

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: mortiz@aadermaffiliates.emadirect.md

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.

• Knoxville Dermatology Group PC

  • Dermatology Physician
  • Knoxville, TN
  • NPI 1760419014

  TN

  Medicare reassignment Care Compare group
• Dermatology Associates of Knoxville, PC

  • Dermatology Physician
  • Knoxville, TN
  • NPI 1407873284

  Dermatology

  NPD (past)
• East Tennessee Dermatology Group, PC

  • Dermatology Physician
  • Alcoa, TN
  • NPI 1891050407

  Dermatology

  NPD (past)

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

{
    "created_epoch": "1318982400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775520000000",
    "number": "1124303334",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 23329",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100873329"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1450 DOWELL SPRINGS BLVD STE 210",
            "city": "KNOXVILLE",
            "state": "TN",
            "postal_code": "379092448",
            "telephone_number": "865-524-2547",
            "fax_number": "865-205-5601"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ORTIZ",
        "first_name": "MARCUS",
        "middle_name": "RENE",
        "name_prefix": "Mr.",
        "name_suffix": "Jr.",
        "credential": "PA-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2011-10-19",
        "last_updated": "2026-04-07",
        "certification_date": "2026-04-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363A00000X",
            "taxonomy_group": "",
            "desc": "Physician Assistant",
            "state": "TN",
            "license": "PA3923",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "Q050882",
            "state": "TN"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Orthotennessee, PC
• Orthotennessee, PC
• Orthotennessee, PC
• Orthotennessee, PC
• Orthotennessee, PC
• Nancy Anne Ortiz, CFNP CERTIFIED FAMIL
• Meredith Marie Coulter Oruc, MD
• Susan Marie Orwick-Barnes, DDS, PC
• Alyssa Osborn, M.S., CCC-SLP
• Emily Osborn

• All providers in Knoxville, TN
• Physician Assistant in Tennessee

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 7, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• 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.

Verify at the official NPI Registry.