NPIMap

Individual provider Active NPI

Timothy August Hartshorn, M.D.

  • Orthopaedic Surgery Physician
  • Needham, MA
National Provider Identifier
1043446503
Registry record updated Aug 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Orthopaedic Surgery PhysicianTaxonomy code 207X00000X
License
250238 Issued in MA
Practice address
145 Rosemary St Ste C
Needham, MA 02494
Phone
(781) 429-7700
Fax
(781) 429-7701
NPI assigned
Jun 10, 2009
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Aug 13, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Orthopaedic Surgery Physician 207X00000X A107628 CA
Orthopaedic Surgery Physician 207X00000X 250238 MA Primary

Addresses

Primary practice location

145 Rosemary St Ste C
Needham, MA 02494

Mailing address

2351 Ocean View Dr
Signal Hill, CA 90755-3778
Phone (310) 546-3461

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MA
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
I20120820000765 MA Practitioner - Orthopedic Surgery 2668629064 Reassigns benefits to 3 organizations

Care Compare profile

Medicare Care Compare
Specialty
Orthopedic Surgery
Education
University of Texas Medical School at Houston, 2007
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Orthoboston LLCGroup PAC ID 6002177557, 3 clinicians
Synergy Surgicalists LLCGroup PAC ID 0244553105, 24 clinicians

Practice addresses (Care Compare)

145 Rosemary St
Suite J
Needham, MA 02494-3259
Phone (781) 429-7700

300 A Faunce Corner Rd
North Dartmouth, MA 02747-1280
Phone (508) 973-2211

Hospital & facility affiliations

Procedures performed for Medicare patients

ProcedureNumber of procedures
Knee replacement1-10
Lower limb (leg) arthroscopy (minimally invasive joint repair)18
Upper limb (arm) arthroscopy (minimally invasive joint repair)1-10
Removal of tissue1-10

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
107628CAMDDentist
A107628CAMDOrthopaedic Surgery Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Synergy Surgicalists LLC Orthopaedic Surgery CurrentSince Jun 1, 2016 Accepting new patients
Orthoboston Steward Orthopaedic Surgery Current Accepting new patients
Steward Medical Group, Inc CurrentSince Sep 10, 2017 Accepting new patients
Steward Medical Group, Inc CurrentSince Sep 10, 2017 Accepting new patients

Locations

11 Nevins St
Ste 201
Brighton, MA 02135
Phone (617) 789-2442

736 Cambridge St
Brighton, MA 02135
Phone (617) 789-2762

1151 Robeson St
Ste 101
Fall River, MA 02720

145 Rosemary St
Ste J
Needham Heights, MA 02494
Phone (617) 938-3999

101 Page St
New Bedford, MA 02740
Phone (508) 961-5425

300A Faunce Corner Rd
North Dartmouth, MA 02747
Phone (508) 973-2213

1 Recovery Rd
Wareham, MA 02571
Phone (508) 273-1980

Interoperability endpoints

  • Direct secure messaging: thartshorn35887@direct.southcoast.org

Organizations & group practices 5

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 6

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

NPI Registry JSON

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

{
    "created_epoch": "1244592000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786579200000",
    "number": "1043446503",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2351 OCEAN VIEW DR",
            "city": "SIGNAL HILL",
            "state": "CA",
            "postal_code": "907553778",
            "telephone_number": "310-546-3461"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "145 ROSEMARY ST STE C",
            "city": "NEEDHAM",
            "state": "MA",
            "postal_code": "02494",
            "telephone_number": "781-429-7700",
            "fax_number": "781-429-7701"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HARTSHORN",
        "first_name": "TIMOTHY",
        "middle_name": "AUGUST",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-06-10",
        "last_updated": "2026-08-13",
        "certification_date": "2026-08-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "CA",
            "license": "A107628",
            "primary": false
        },
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "MA",
            "license": "250238",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Needham, MA

Sources for this page

Verify at the official NPI Registry.