NPIMap

Individual provider Active NPI

Nicholas Dyson Casscells

  • Orthopaedic Surgery Physician
  • Washington, DC
National Provider Identifier
1811330996
Registry record updated Jan 9, 2023
On this page

Key facts

NPPES NPI Registry
Primary specialty
Orthopaedic Surgery PhysicianTaxonomy code 207X00000X
License
MD047193 Issued in DC
Practice address
3800 Reservoir Rd NW
Dept of Orthopaedic Surgery
Washington, DC 20007-2113
Phone
(202) 444-8766
Fax
(202) 444-0272
NPI assigned
Apr 9, 2013
Last updated
Jan 9, 2023By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jan 9, 2023

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Orthopaedic Surgery Physician 207X00000X MD047193 DC Primary
Orthopaedic Foot and Ankle Surgery Physician 207XX0004X MD047193 DC

Addresses

Primary practice location

3800 Reservoir Rd NW
Dept of Orthopaedic Surgery
Washington, DC 20007-2113

Mailing address

PO Box 418283
Boston, MA 02241-8283
Phone (703) 558-1400

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in DC
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
I20190918000092 DC Practitioner - Orthopedic Surgery 4486984499 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Orthopedic Surgery
Education
Other, 2013
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Medstar Medical Group II LLCGroup PAC ID 0547413825, 3,726 clinicians

Practice addresses (Care Compare)

3800 Reservoir Rd NW
Washington, DC 20007-2113
Phone (202) 444-2000

6410 Rockledge Dr
Suite 600
Bethesda, MD 20817-1844

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
82.97 of 100Reported as group
Quality
72.87
Promoting interoperability
100
Improvement activities
40
Cost
67.82

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
MD047193DCMDOrthopaedic Foot and Ankle Surgery Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Medstar Medical Group II LLC CurrentSince May 2, 2025 Accepting new patients
Medstar Medical Group II LLC CurrentSince Sep 1, 2019 Accepting new patients
Medstar Medical Group II LLC Orthopaedic Surgery CurrentSince Sep 1, 2019 Accepting new patients
Medstar Medical Group II LLC CurrentSince May 2, 2025 Accepting new patients
MGMC, LLC Current Accepting new patients
Medstar Georgetown Medical Center, Inc Past Accepting new patients
Medstar Medical Group II LLC Past Accepting new patients
Frederick Health Hospital Inc Past Accepting new patients

Locations

1120 20th St NW
Washington, DC 20036
Phone (202) 370-1386

1120 20th St NW
Frnt 1
Washington, DC 20036
Phone (202) 416-2000

1120 20th St NW
Frnt 1SA
Washington, DC 20036

1120 20th St NW
Ste 115
Washington, DC 20036
Phone (202) 416-2000

1145 19th St NW
Ste 311
Washington, DC 20036
Phone (202) 429-2401

3800 Reservoir Rd NW
Washington, DC 20007
Phone (202) 687-2203

3800 Reservoir Rd NW
#1
Washington, DC 20007
Phone (202) 444-0957

Organizations & group practices 9

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.

Hospital & facility affiliations 4

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": "1365465600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1673222400000",
    "number": "1811330996",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 418283",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022418283",
            "telephone_number": "703-558-1400",
            "fax_number": "703-558-1445"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3800 RESERVOIR RD NW",
            "address_2": "DEPT OF ORTHOPAEDIC SURGERY",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200072113",
            "telephone_number": "202-444-8766",
            "fax_number": "202-444-0272"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CASSCELLS",
        "first_name": "NICHOLAS",
        "middle_name": "DYSON",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-04-09",
        "last_updated": "2023-01-09",
        "certification_date": "2023-01-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207X00000X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery",
            "state": "DC",
            "license": "MD047193",
            "primary": true
        },
        {
            "code": "207XX0004X",
            "taxonomy_group": "",
            "desc": "Orthopaedic Surgery, Foot and Ankle Surgery",
            "state": "DC",
            "license": "MD047193",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Washington, DC

Sources for this page

Verify at the official NPI Registry.