Individual provider Active NPI

Michael Seijong Hong, MD

  • Dermatology Physician
  • Owings Mills, MD
National Provider Identifier
1578140240
Registry record updated Jul 1, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Dermatology PhysicianTaxonomy code 207N00000X
License
D0102342 Issued in MD
Practice address
21 Crossroads Dr Ste 255
Owings Mills, MD 21117-5495
Phone
(410) 363-2320
NPI assigned
Mar 26, 2021
Last updated
Jul 1, 2025By the provider in NPPES
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jul 1, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Dermatology Physician 207N00000X D0102342 MD Primary

Addresses

Primary practice location

21 Crossroads Dr Ste 255
Owings Mills, MD 21117-5495

Mailing address

21 Crossroads Dr Ste 255
Owings Mills, MD 21117-5495
Phone (410) 363-2320

Other practice location 1

2401 W Belvedere Ave
Baltimore, MD 21215-5216
Phone (410) 601-7639

Other practice location 2

419 W Redwood St
Baltimore, MD 21201-1734
Phone (667) 214-1171

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MD
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

Enrollment IDStateProvider typePAC IDDetails
I20250724000325 MD Practitioner - Dermatology 7618378423 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Dermatology
Education
University of Maryland School of Medicine, 2021
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Pennsylvania Dermatology Partners IncGroup PAC ID 3274794268, 75 clinicians

Practice addresses (Care Compare)

21 Crossroads Dr
Suite 255
Owings Mills, MD 21117-5495
Phone (410) 363-2320

Procedures performed for Medicare patients

ProcedureNumber of procedures
Melanoma (skin cancer) excision34
Removal of skin lesions424
Removal or shaving of skin growth45
Skin biopsy124

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
D0102342MDMDDermatology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Pennsylvania Dermatology Partners Inc Single Specialty CurrentSince Jul 1, 2025 Accepting new patients
Sinai Hospital of Baltimore Inc Single Specialty Current Accepting new patients
Sinai Hospital of Baltimore Inc Single Specialty CurrentSince Aug 22, 2025 Accepting new patients
Sinai Hospital of Baltimore, Inc. CurrentSince Aug 22, 2025 Accepting new patients
Irving D. Wolfe, M.D.,PA Single Specialty PastSince Jun 3, 2025 Accepting new patients

Locations

2401 W Belvedere Ave
Baltimore, MD 21215

2435 W Belvedere Ave
Ste 56
Baltimore, MD 21215
Phone (410) 578-8632

21 Crossroads Dr
Ste 255
Owings Mills, MD 21117
Phone (410) 363-2320

10 Fila Way
Ste 205
Sparks Glencoe, MD 21152
Phone (410) 223-2620

258 Ben Franklin Hwy E
Birdsboro, PA 19508
Phone (610) 288-2918

Interoperability endpoints

  • Direct secure messaging: mhong@pennderm.emadirect.md

Organizations & group practices 5

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.

NPI Registry JSON

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

{
    "created_epoch": "1616716800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1751328000000",
    "number": "1578140240",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "21 CROSSROADS DR STE 255",
            "city": "OWINGS MILLS",
            "state": "MD",
            "postal_code": "211175495",
            "telephone_number": "410-363-2320",
            "fax_number": "410-363-8475"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "21 CROSSROADS DR STE 255",
            "city": "OWINGS MILLS",
            "state": "MD",
            "postal_code": "211175495",
            "telephone_number": "410-363-2320"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2401 W Belvedere Ave",
            "address_purpose": "LOCATION",
            "city": "Baltimore",
            "state": "MD",
            "postal_code": "212155216",
            "country_code": "US",
            "telephone_number": "410-601-7639",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "419 W Redwood St",
            "address_purpose": "LOCATION",
            "city": "Baltimore",
            "state": "MD",
            "postal_code": "212011734",
            "country_code": "US",
            "telephone_number": "667-214-1171",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "HONG",
        "first_name": "MICHAEL",
        "middle_name": "SEIJONG",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-03-26",
        "last_updated": "2025-07-01",
        "certification_date": "2025-07-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207N00000X",
            "taxonomy_group": "",
            "desc": "Dermatology",
            "state": "MD",
            "license": "D0102342",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Owings Mills, MD

Sources for this page

Verify at the official NPI Registry.