NPIMap

Organization Active NPI

Maximed Associates Inc.

  • Infectious Disease Physician
  • Silver Spring, MD
National Provider Identifier
1730304718
Registry record updated Jan 23, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Infectious Disease PhysicianTaxonomy code 207RI0200X
License
D0046584 Issued in MD
Legal business name
MAXIMED ASSOCIATES INC.
Practice address
12126 Heritage Park Cir
Silver Spring, MD 20906-4554
Phone
(301) 460-6664
Fax
(301) 460-7867
NPI assigned
Apr 16, 2007
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Jan 23, 2026

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

Authorized official

Name
John Ian McNeil, M.D.NPI 1407828254
Title
President
Phone
(301) 460-6664

Authorized official NPPES reports the official by name only. The link goes to the one practitioner connected to this organization with that name.

Specialties & licenses 4

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207R00000X D0046584 MD
Internal Medicine PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207R00000X D0060089 MD
Infectious Disease PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207RI0200X D0046584 MD Primary
Infectious Disease PhysicianGroup: 193200000X MULTI-SPECIALTY GROUP 207RI0200X D0060089 MD

Addresses

Primary practice location

12126 Heritage Park Cir
Silver Spring, MD 20906-4554

Mailing address

12126 Heritage Park Cir
Silver Spring, MD 20906-4554
Phone (301) 460-6664

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20050408000307 DC Part B Supplier - Clinic/Group Practice 2769429075 Receives reassigned benefits from 3 practitioners
Practice locations: Silver Spring, MD

National Provider Directory

National Provider Directory

Locations

13975 Connecticut Ave
Ste 202
Silver Spring, MD 20906
Phone (301) 460-6664

Interoperability endpoints

  • FHIR API: https://fhir4.healow.com/fhir/r4/ACEDBD

Practitioners & affiliated clinicians

Practitioners 3

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

NPI Registry JSON

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

{
    "created_epoch": "1176681600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1769126400000",
    "number": "1730304718",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "12126 HERITAGE PARK CIR",
            "city": "SILVER SPRING",
            "state": "MD",
            "postal_code": "209064554",
            "telephone_number": "301-460-6664",
            "fax_number": "877-919-2471"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "12126 HERITAGE PARK CIR",
            "city": "SILVER SPRING",
            "state": "MD",
            "postal_code": "209064554",
            "telephone_number": "301-460-6664",
            "fax_number": "301-460-7867"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MAXIMED ASSOCIATES INC.",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-04-16",
        "last_updated": "2026-01-23",
        "certification_date": "2026-01-23",
        "status": "A",
        "authorized_official_last_name": "MCNEIL",
        "authorized_official_first_name": "JOHN",
        "authorized_official_middle_name": "IAN",
        "authorized_official_title_or_position": "PRESIDENT",
        "authorized_official_telephone_number": "301-460-6664",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": "MD",
            "license": "D0046584",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": "MD",
            "license": "D0060089",
            "primary": false
        },
        {
            "code": "207RI0200X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Infectious Disease",
            "state": "MD",
            "license": "D0046584",
            "primary": true
        },
        {
            "code": "207RI0200X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine, Infectious Disease",
            "state": "MD",
            "license": "D0060089",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Silver Spring, MD

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 23, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.