Mark Sonnenschine, D.O.

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

242242 Issued in NY

Practice address

6201 15TH Ave Ste 306
Brooklyn, NY 11219-5411

Phone

(718) 775-2700

NPI assigned

Aug 22, 2007

Last updated

Aug 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in NY

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

Hematology/OncologyAlso: Internal Medicine

Education

New York College of Osteo Medicine of New York Institute of Technology, 2003

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Physician Affiliate Group of New York PCGroup PAC ID 4688098833, 1,222 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Girling Health Care of New York Home health agency, Brooklyn, NY, CCN 337243
• Maimonides Medical Center Hospital, Brooklyn, NY, CCN 330194
• South Brooklyn Health Hospital, Brooklyn, NY, CCN 330196

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Networks

• Healthfirst Medicare Network H5989
• Healthfirst Medicare Network H1722
• Healthfirst Medicare Network H9678
• Healthfirst Medicare Network H3359

Interoperability endpoints

• Direct secure messaging: marksonnenschine@mai.allscriptsdirect.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.

• Physician Affiliate Group of New York PC

  • Registered Dietitian
  • New York, NY
  • NPI 1013375526
  Medicare reassignment Care Compare group NPD
• Progressive Hematology and Oncology PLLC

  • Hematology & Oncology Physician
  • Brooklyn, NY
  • NPI 1114271673
  Medicare reassignment NPD Authorized official
• Coney Island Medical Practice Plan, P.C.

  • General Practice Physician
  • Brooklyn, NY
  • NPI 1386951762
  Medicare reassignment NPD
• Maimonides Medical Center

  • General Acute Care Hospital
  • Brooklyn, NY
  • NPI 1093777492
  NPD
• Anish Desai Internal Medicine PLLC

  • Internal Medicine Physician
  • Brooklyn, NY
  • NPI 1356196786
  NPD (past)

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

• HCS Certified Home Care Ny Inc

  dba Girling Health Care of New york, Inc

  • Home Health Agency
  • Brooklyn, NY
  • NPI 1568886653
  Care Compare affiliation
• Maimonides Medical Center

  • General Acute Care Hospital
  • Brooklyn, NY
  • NPI 1093777492
  Care Compare affiliation
• New York City Health and Hospitals Corporation

  dba Coney Island Hospital

  • General Acute Care Hospital
  • Brooklyn, NY
  • NPI 1124032982
  Care Compare affiliation

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

{
    "created_epoch": "1187740800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1786579200000",
    "number": "1922291939",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6201 15TH AVE STE 306",
            "city": "BROOKLYN",
            "state": "NY",
            "postal_code": "112195411",
            "telephone_number": "718-775-2700"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6201 15TH AVE STE 306",
            "city": "BROOKLYN",
            "state": "NY",
            "postal_code": "112195411",
            "telephone_number": "718-775-2700"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "235 W 135th St Ste 103",
            "address_purpose": "LOCATION",
            "city": "New York",
            "state": "NY",
            "postal_code": "100302861",
            "country_code": "US",
            "telephone_number": "718-775-2700",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SONNENSCHINE",
        "first_name": "MARK",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-08-22",
        "last_updated": "2026-08-13",
        "certification_date": "2026-08-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "242242",
            "primary": false
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "NY",
            "license": "242242",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "03112214",
            "state": "NY"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Zev Moses Sonneborn-Turetsky, MD/MPH
• Dina Sonnenblick, OTR/L
• Cheryl Sonnenschein
• Lea Sonnenschein, MSW STUDENT
• Chaya Rachel Sonnenschine, LCSW
• Nechama Rena Sonnenschine, CCC-SLP
• Danielle Nicole Sontag
• Leah Sontag, PA
• Shoshana Sontag
• TSZ Yan Soo, PA-C

• Hematology & Oncology Physician in Brooklyn, NY
• Providers in Brooklyn, NY by specialty
• Hematology & Oncology Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 13, 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.