Jonathan Spencer Mellen, M.D.

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

44619 Issued in AZ

Practice address

9305 W Thomas Rd
Ste 478
Phoenix, AZ 85037-3375

Phone

(623) 236-8507

Fax

(623) 236-8508

NPI assigned

Feb 14, 2007

Last updated

Jun 11, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in AZ, AK, TX3 enrollments

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 3

Specialty

GastroenterologyAlso: Internal Medicine

Education

Other, 2004

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Northern Arizona Healthcare CorporationGroup PAC ID 3577473362, 391 clinicians

Yuma Regional Medical CenterGroup PAC ID 2062314826, 367 clinicians

Alaska Gi Associates LLCGroup PAC ID 8426543323, 6 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Yuma Regional Medical Center Hospital, Yuma, AZ, CCN 030013
• Mat-Su Regional Medical Center Hospital, Palmer, AK, CCN 020006

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: jonathan.mellen.1@15989.direct.athenahealth.com

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.

• Yuma Regional Medical Center

  dba Onvida Health Yuma Medical Center

  • General Acute Care Hospital
  • Yuma, AZ
  • NPI 1194706655
  Medicare reassignment Care Compare group NPD
• Alaska Gi Associates LLC

  • Gastroenterology Physician
  • Wasilla, AK
  • NPI 1669365698
  Medicare reassignment Care Compare group NPD
• Arizona Centers for Digestive Health LLC

  • Gastroenterology Physician
  • Gilbert, AZ
  • NPI 1568975316
  Medicare reassignment NPD
• Honorhealth Ambulatory

  dba HonorHealth Research Institute

  • Hematology & Oncology Physician
  • Scottsdale, AZ
  • NPI 1407050917
  Medicare reassignment NPD
• Tanana Chiefs Conference

  • Multi-Specialty Clinic/Center
  • Fairbanks, AK
  • NPI 1821201278

  TX

  Medicare reassignment NPD
• Northern Arizona Healthcare Corporation

  • Family Medicine Physician
  • Flagstaff, AZ
  • NPI 1669914552

  Internal Medicine

  Care Compare group NPD
• Northern Arizona Healthcare Corporation

  dba Northern Arizona Healthcare Children's Health Center

  • Multi-Specialty Clinic/Center
  • Flagstaff, AZ
  • NPI 1235732702
  NPD
• Scottsdale Healthcare Corp

  • Family Medicine Physician
  • Scottsdale, AZ
  • NPI 1992044713
  NPD
• Yuma Regional Medical Center

  dba Onvida Health Yuma Medical Center

  • General Practice Physician
  • Yuma, AZ
  • NPI 1598993420

  Internal Medicine

  NPD
• Mat-Su Valley III LLC

  • Internal Medicine Physician
  • Palmer, AK
  • NPI 1366752560
  NPD
• Tanana Chiefs Conference

  • Ambulatory Surgical Clinic/Center
  • Fairbanks, AK
  • NPI 1871332387
  NPD

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

• Yuma Regional Medical Center

  dba Onvida Health Yuma Medical Center

  • General Acute Care Hospital
  • Yuma, AZ
  • NPI 1194706655
  Care Compare affiliation
• Mat-Su Valley Medical Center LLC

  dba Mat-Su Regional Medical Center

  • General Acute Care Hospital
  • Palmer, AK
  • NPI 1417975061
  Care Compare affiliation

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

{
    "created_epoch": "1171411200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781136000000",
    "number": "1609919471",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9305 W THOMAS RD",
            "address_2": "STE 478",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850373375",
            "telephone_number": "623-236-8507",
            "fax_number": "623-236-8508"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "9305 W THOMAS RD",
            "address_2": "STE 478",
            "city": "PHOENIX",
            "state": "AZ",
            "postal_code": "850373375",
            "telephone_number": "623-236-8507",
            "fax_number": "623-236-8508"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2490 S Woodworth Loop Ste 200",
            "address_purpose": "LOCATION",
            "city": "Palmer",
            "state": "AK",
            "postal_code": "996457410",
            "country_code": "US",
            "telephone_number": "907-861-6315",
            "fax_number": "907-861-6533",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1200 N Beaver St",
            "address_purpose": "LOCATION",
            "city": "Flagstaff",
            "state": "AZ",
            "postal_code": "860013118",
            "country_code": "US",
            "telephone_number": "928-773-2332",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2400 S Avenue A",
            "address_purpose": "LOCATION",
            "city": "Yuma",
            "state": "AZ",
            "postal_code": "853647170",
            "country_code": "US",
            "telephone_number": "928-336-3213",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MELLEN",
        "first_name": "JONATHAN",
        "middle_name": "SPENCER",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-02-14",
        "last_updated": "2026-06-11",
        "certification_date": "2026-06-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "AZ",
            "license": "44619",
            "primary": true
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "AK",
            "license": "210986",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Meliora Counseling & Wellness
• Melissa Affronti Counseling and Consulting LLC
• Melissa Campbell, P.C. (Melissa Campbell, M.D.)
• Melissa Leonard PA-C Surgical Assist
• Joseph Melius, MEDICAL STUDENT
• Christopher R Mellon, DO
• Kiley Mellott, RBT
• Nathaniel Simon Mellul, DMD
• Jennifer Jo Mellum, LMHC
• A Philip Melmed, MD

• Gastroenterology Physician in Phoenix, AZ
• Providers in Phoenix, AZ by specialty
• Gastroenterology Physician in Arizona

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 11, 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.