Mark J Sarnak, M.D.

Primary specialty

Nephrology PhysicianTaxonomy code 207RN0300X

License

82001 Issued in MA

Practice address

750 Washington St
Tufts- New England Medical Center
Boston, MA 02111-1526

Phone

(617) 636-5866

NPI assigned

Jun 1, 2006

Last updated

Jul 13, 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

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

Nephrology

Education

Columbia University College of Physicians and Surgeons, 1993

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Pratt Medical Group IncGroup PAC ID 3375515661, 282 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Tufts Medical Center Hospital, Boston, MA, CCN 220116

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: msarnak29315@tuftsmedicine.direct-ci.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.

• Pratt Medical Group, Inc

  dba Pratt Medical Group, Inc-General Medical Associates

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1275570319

  Nephrology

  Medicare reassignment Care Compare group NPD
• Pratt Medical Group, Inc

  dba Pratt Medical Group, Inc - Pulmonary Disease

  • Pulmonary Disease Physician
  • Boston, MA
  • NPI 1508187642
  NPD
• New England Medical Center

  • Critical Access Hospital
  • Boston, MA
  • NPI 1487875498
  NPD (past)
• Tufts Medical Center, Inc.

  dba Tufts Medical Center

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1730132515
  NPD (past)

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

• Tufts Medical Center, Inc.

  dba Tufts Medical Center

  • General Acute Care Hospital
  • Boston, MA
  • NPI 1730132515
  Care Compare affiliation

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

{
    "created_epoch": "1149120000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1982641502",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "750 WASHINGTON ST",
            "address_2": "TUFTS- NEW ENGLAND MEDICAL CENTER BOX 391",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021111526",
            "telephone_number": "617-636-5866"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "750 WASHINGTON ST",
            "address_2": "TUFTS- NEW ENGLAND MEDICAL CENTER",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021111526",
            "telephone_number": "617-636-5866"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SARNAK",
        "first_name": "MARK",
        "middle_name": "J",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-01",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RN0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Nephrology",
            "state": "MA",
            "license": "82001",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Deesha Sarma, MD
• Jaydev Vempati Sarma, MD
• Shohinee Sarma, MD MPH FRCPC
• Alberto E Sarmiento
• Stav Shabtai Sarna-Cahan, M.D
• James Liberio Sarni, MD
• Danielle Leah Sarno, M.D.
• Karen L Saroca, M.D.
• Patrick Saroka, PT, DPT
• Kailyn Saron, PNP-PC

• Nephrology Physician in Boston, MA
• Providers in Boston, MA by specialty
• Nephrology Physician in Massachusetts

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