NPIMap

Individual provider Active NPI

Saif A. Alenizi, M.D., M.P.H.

  • Nephrology Physician
  • Boston, MA
National Provider Identifier
1255680997
Registry record updated Feb 20, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Nephrology PhysicianTaxonomy code 207RN0300X
License
279721 Issued in MA
Practice address
45 Francis St
Boston, MA 02115
Phone
(617) 732-6383
NPI assigned
Sep 7, 2012
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 20, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Nephrology Physician 207RN0300X 279721 MA Primary

Addresses

Primary practice location

45 Francis St
Boston, MA 02115

Mailing address

45 Francis St
Boston, MA 02115-6105

Other practice location 1

75 Francis St
Boston, MA 02115-6110
Phone (617) 732-5500

Other practice location 2

119 Belmont St
Worcester, MA 01605-2903
Phone (508) 334-3155

Other practice location 3

55 Lake Ave N
Worcester, MA 01655-0002
Phone (508) 334-3155

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
I20190826001428 MA Practitioner - NephrologyPractitioner - Internal Medicine 2264725688 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
NephrologyAlso: Internal Medicine
Education
Other, 2006
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Emerson Practice Associates, Inc 247 clinicians
Mass General Brigham Medical Group Suburban Massachusetts Inc 534 clinicians
Brigham and Womens Physicians Organization Inc 2,931 clinicians
Umass Memorial Medical Group Inc 2,494 clinicians

Practice addresses (Care Compare)

133 Old Rd to 9 Acre Cor
Concord, MA 01742-4159
Phone (978) 287-3020

2014 Washington St
Newton, MA 02462-1607
Phone (617) 243-6000

45 Francis St
Boston, MA 02115-6105
Phone (617) 732-5500

55 Lake Ave N
Worcester, MA 01655-0002
Phone (508) 334-1000

Hospital & facility affiliations

  • Brigham and Women'S Hospital Hospital, Boston, MA, CCN 220110
  • Umass Memorial Medical Center/University Campus Hospital, Worcester, MA, CCN 220163
  • Newton-Wellesley Hospital Hospital, Newton, MA, CCN 220101
  • Brigham and Women Faulkner Hospital Hospital, Jamaica Plain, MA, CCN 220119
  • Emerson Hospital - Hospital, W Concord, MA, CCN 220084

National Provider Directory

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

Practice roles

OrganizationSpecialtyStatusNew patients
Umass Memorial Medical Group Inc CurrentSince Mar 1, 2025 Accepting new patients
Brigham & Womens Physicians Organization Inc CurrentSince Aug 6, 2019 Accepting new patients
Mass General Brigham Medical Group Suburban Massachusetts Inc CurrentSince Aug 1, 2024 Accepting new patients
Emerson Practice Associates, Inc. CurrentSince Aug 11, 2025 Accepting new patients
Brigham and Women'S Hospital Current Accepting new patients
Umass Memorial Medical Group, Inc. CurrentSince Mar 1, 2025 Accepting new patients

Locations

45 Francis St
Boston, MA 02115
Phone (617) 332-1700

75 Francis St
Boston, MA 02115

62 13th St
Charlestown, MA 02129
Phone (617) 724-4260

133 Ornac
Concord, MA 01742
Phone (978) 287-3000

2014 Washington St
Newtonville, MA 02462
Phone (617) 243-6000

119 Belmont St
Worcester, MA 01605
Phone (508) 334-6345

55 Lake Ave N
Worcester, MA 01655
Phone 508334100048862

Interoperability endpoints

  • Direct secure messaging: muhsin.saif.bwh@direct.partners.masshiway.net

Organizations & group practices 11

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": "1346976000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1740009600000",
    "number": "1255680997",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "45 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021156105"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "45 FRANCIS ST",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "02115",
            "telephone_number": "617-732-6383"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "75 Francis St",
            "address_purpose": "LOCATION",
            "city": "Boston",
            "state": "MA",
            "postal_code": "021156110",
            "country_code": "US",
            "telephone_number": "617-732-5500",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "119 Belmont St",
            "address_purpose": "LOCATION",
            "city": "Worcester",
            "state": "MA",
            "postal_code": "016052903",
            "country_code": "US",
            "telephone_number": "508-334-3155",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "55 Lake Ave N",
            "address_purpose": "LOCATION",
            "city": "Worcester",
            "state": "MA",
            "postal_code": "016550002",
            "country_code": "US",
            "telephone_number": "508-334-3155",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ALENIZI",
        "first_name": "SAIF",
        "middle_name": "A.",
        "name_prefix": "Dr.",
        "credential": "M.D., M.P.H.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2012-09-07",
        "last_updated": "2025-02-20",
        "certification_date": "2025-02-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RN0300X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Nephrology",
            "state": "MA",
            "license": "279721",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Boston, MA

Sources for this page

Verify at the official NPI Registry.