Nathan J Abare II, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

235479 Issued in MA

Practice address

100 Wason Ave Ste 240
Springfield, MA 01107-1179

Phone

(413) 794-9223

Fax

(413) 794-8361

NPI assigned

May 18, 2007

Last updated

Jun 4, 2025By 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 MA

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

HospitalistAlso: Internal Medicine

Education

University of Massachusetts Medical School, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Baystate Medical Practices IncGroup PAC ID 5991602971, 1,350 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Baystate Medical Center Hospital, Springfield, MA, CCN 220077
• Baystate Wing Hospital Hospital, Palmer, MA, CCN 220030

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Baystate Medical Practices, Inc

  • Emergency Medical Services (Emergency Medicine) Physician
  • Springfield, MA
  • NPI 1548205909

  Internal Medicine

  Medicare reassignment Care Compare group NPD
• Baystate Affiliated Practice Organization

  • Internal Medicine Physician
  • Springfield, MA
  • NPI 1043256043
  NPD (past)

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

• Baystate Medical Center Inc

  dba Baystate Medical Center

  • General Acute Care Hospital
  • Springfield, MA
  • NPI 1487655064
  Care Compare affiliation
• Baystate Medical Center Inc

  dba Baystate Reference Laboratories

  • Clinical Medical Laboratory
  • Springfield, MA
  • NPI 1568488450

  Hospital

  Care Compare affiliation
• Baystate Wing Hospital Corporation

  dba Baystate Wing Hospital & Medical Centers

  • General Acute Care Hospital
  • Palmer, MA
  • NPI 1962410233
  Care Compare affiliation

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

{
    "created_epoch": "1179446400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1748995200000",
    "number": "1386852747",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "280 CHESTNUT ST",
            "address_2": "2ND FLOOR",
            "city": "SPRINGFIELD",
            "state": "MA",
            "postal_code": "011991001",
            "telephone_number": "413-794-5700"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 WASON AVE STE 240",
            "city": "SPRINGFIELD",
            "state": "MA",
            "postal_code": "011071179",
            "telephone_number": "413-794-9223",
            "fax_number": "413-794-8361"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ABARE",
        "first_name": "NATHAN",
        "middle_name": "J",
        "name_suffix": "II",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-05-18",
        "last_updated": "2025-06-04",
        "certification_date": "2025-06-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "235479",
            "primary": true
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "MA",
            "license": "235479",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Aaron Transport LLC
• Mitchell Aarons
• Patrick Abad, MD
• Daniela L Abarca
• Alison Abare
• Tatyana Abashina
• Ramsha Abbas, MBBS
• Abdullah Abbasi
• Jaime Lynn Abbiati, PA-C
• Brianna Michelle Abbott, LMHC LADC1

• Internal Medicine Physician in Springfield, MA
• Providers in Springfield, MA by specialty
• Internal Medicine Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 4, 2025; 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.