John Irwin Jr.

Primary specialty

Pediatrics PhysicianTaxonomy code 208000000X

License

D0056211 Issued in MD

Practice address

3001 S Hanover St
Suite 211
Baltimore, MD 21225-1233

Phone

(410) 350-2173

NPI assigned

Apr 3, 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

Enrolled in MD, DC2 enrollments

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 2

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

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.

• Medstar Medical Group II LLC

  • General Practice Physician
  • Baltimore, MD
  • NPI 1184046187

  DC

  Medicare reassignment NPD
• Medstar Medical Group II LLC

  • Diagnostic Radiology Physician
  • Washington, DC
  • NPI 1578302055
  NPD
• Frederick Health Hospital Inc

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)
• Harbor Hospital

  • Diagnostic Radiology Physician
  • Pasadena, MD
  • NPI 1053438218
  NPD (past)
• Harbor Hospital

  • Multi-Specialty Clinic/Center
  • Baltimore, MD
  • NPI 1831110873
  NPD (past)
• Harbor Hospital

  • Clinical Pathology/Laboratory Medicine Physician
  • Baltimore, MD
  • NPI 1851507545
  NPD (past)
• Harbor Hospital, Inc.

  • General Acute Care Hospital
  • Baltimore, MD
  • NPI 1720175623
  NPD (past)
• Medstar Medical Group II LLC

  • Internal Medicine Physician
  • Washington, DC
  • NPI 1376887844
  NPD (past)

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

{
    "created_epoch": "1144022400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1710949219",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3001 S HANOVER ST",
            "address_2": "SUITE 211",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212251233",
            "telephone_number": "410-350-2173"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3001 S HANOVER ST",
            "address_2": "SUITE 211",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212251233",
            "telephone_number": "410-350-2173"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "IRWIN",
        "first_name": "JOHN",
        "name_suffix": "Jr.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-04-03",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "MD",
            "license": "D0056211",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kathleen E. Irvin, P.A-C
• Mikayla Irvin, RDN, LDN
• Nathan A Irvin, M.D.
• Risha Renee' Irvin, M.D.
• Elizabeth Hazebroek Irving, ATC
• Katherine Elyse Irwin
• Symone Isaac-Wilkins, MD
• Andrea Isaac
• Chandra Isaac, M.S., ADT
• Elizabeth Isaac, M.AC.; L.AC.; ADS

• Pediatrics Physician in Baltimore, MD
• Providers in Baltimore, MD by specialty
• Pediatrics Physician in Maryland

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

Verify at the official NPI Registry.