Alexander Jonas Liwag, MD

Primary specialty

Pediatrics PhysicianTaxonomy code 208000000X

License

25MA07966900 Issued in NJ

Practice address

3350 Hwy 138
BLDG 2, Suite 126
Wall Township, NJ 07719-9693

Phone

(732) 280-6455

Fax

(732) 280-6456

NPI assigned

Feb 8, 2006

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

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: alexander.liwag.1@2227.direct.athenahealth.com
• Direct secure messaging: aliwag77068@direct.optum.com

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.

• MTM Pediatrics, LLC

  • Pediatrics Physician
  • Wall Township, NJ
  • NPI 1669444204
  NPD (past)
• Watchung Pediatrics

  • Pediatrics Physician
  • Warren, NJ
  • NPI 1225021181
  NPD (past)

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

{
    "created_epoch": "1139356800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1235102575",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3350 HWY 138",
            "address_2": "BLDG 2, SUITE 126",
            "city": "WALL TOWNSHIP",
            "state": "NJ",
            "postal_code": "077199693",
            "telephone_number": "732-280-6455",
            "fax_number": "732-280-6456"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3350 HWY 138",
            "address_2": "BLDG 2, SUITE 126",
            "city": "WALL TOWNSHIP",
            "state": "NJ",
            "postal_code": "077199693",
            "telephone_number": "732-280-6455",
            "fax_number": "732-280-6456"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "LIWAG",
        "first_name": "ALEXANDER",
        "middle_name": "JONAS",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-02-08",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "NJ",
            "license": "25MA07966900",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Brenden Matthew Lee, PA-C
• Colleen Marie Leonard, OTLRMSHS
• Tyler James Lesko, OD
• Laureen Lightfoot, APN
• Theresa Lindemann, APN-FNP-C
• Lucky Baby Lactation Services
• Stefanie Warner Lukins, M.S., OTR/L
• Stuart Michael Luther, MS, LAC, NCC
• Kevin Robert Lynn, PSY D.
• M H Al - Asha MD PA

• Pediatrics Physician in Wall Township, NJ
• Providers in Wall Township, NJ by specialty
• Pediatrics Physician in New Jersey

• 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.