Nicholas Henry Elias Mezitis, M.D.

Primary specialty

Endocrinology, Diabetes & Metabolism PhysicianTaxonomy code 207RE0101X

License

35.123869 Issued in OH

Practice address

1818 Washington Blvd Ste F
Belpre, OH 45714-2080

Phone

(740) 423-3640

Fax

(740) 423-3641

NPI assigned

Oct 4, 2006

Last updated

Oct 27, 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 1

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in OH

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 1

Specialty

EndocrinologyAlso: Internal Medicine

Education

Other, 1977

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Marietta Memorial HospitalGroup PAC ID 8224928965, 387 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Marietta Memorial Hospital Hospital, Marietta, OH, CCN 360147
• Selby General Hospital Hospital, Marietta, OH, CCN 361319
• Ohiohealth O'Bleness Hospital Hospital, Athens, OH, CCN 360014

Merit-based Incentive Payment System (MIPS)

Final score

80.04 of 100Reported as group

Quality

58.67

Promoting interoperability

98

Improvement activities

40

Cost

76.46

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: nicholas.mezitis@mmhs.medicity.net

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.

• Marietta Memorial Hospital

  dba Department of Primary Care

  • Rural Health Clinic/Center
  • Woodsfield, OH
  • NPI 1962106328
  Medicare reassignment Care Compare group NPD
• Ohiohealth Corporation

  dba OhioHealth Physician Group, Inc

  • Family Medicine Physician
  • Columbus, OH
  • NPI 1578545273

  Endocrinology, Diabetes & Metabolism

  Medicare reassignment NPD
• Marietta Memorial Hospital

  • General Acute Care Hospital
  • Marietta, OH
  • NPI 1215936927
  NPD
• Ohiohealth Corporation

  dba OhioHealth Physician Group Inc

  • Anesthesiology Physician
  • Columbus, OH
  • NPI 1407292105
  NPD

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

• Marietta Memorial Hospital

  • General Acute Care Hospital
  • Marietta, OH
  • NPI 1215936927
  Care Compare affiliation
• Selby General Hospital

  • Critical Access Hospital
  • Marietta, OH
  • NPI 1124073465
  Care Compare affiliation
• Sheltering Arms Hospital Foundation, Inc.

  dba O'Bleness Memorial Hospital

  • General Acute Care Hospital
  • Athens, OH
  • NPI 1710913462
  Care Compare affiliation

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

{
    "created_epoch": "1159920000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1793059200000",
    "number": "1265527295",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 7527",
            "city": "DUBLIN",
            "state": "OH",
            "postal_code": "430170727"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1818 WASHINGTON BLVD STE F",
            "city": "BELPRE",
            "state": "OH",
            "postal_code": "457142080",
            "telephone_number": "740-423-3640",
            "fax_number": "740-423-3641"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MEZITIS",
        "first_name": "NICHOLAS",
        "middle_name": "HENRY ELIAS",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-04",
        "last_updated": "2026-10-27",
        "certification_date": "2026-10-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RE0101X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
            "state": "OH",
            "license": "35.123869",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "nicholas.mezitis@mmhs.directaddress.net",
            "affiliation": "N",
            "address_1": "1818 Washington Blvd Ste F",
            "city": "Belpre",
            "state": "OH",
            "country_code": "US",
            "postal_code": "457142080",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Richard Keith McFee, O.D.
• Anita McIntyre
• Alivia Sloan Mercer
• Gregory S Meyers, MD
• Olivia Mezick
• Mid-Ohio Valley Medical Center Inc
• Mid-Ohio Valley Medical Group Inc.
• Miller Prosthetics & Orthotics
• Hailey Miller
• Alisha Mills, NP

• Endocrinology, Diabetes & Metabolism Physician in Belpre, OH
• Providers in Belpre, OH by specialty
• Endocrinology, Diabetes & Metabolism Physician in Ohio

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 27, 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.