Individual provider Active NPI

Diane Witkowski

  • Nurse Practitioner
  • Frederick, MD
National Provider Identifier
1720483456
Registry record updated Jun 13, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Nurse PractitionerTaxonomy code 363L00000X
License
R186991 Issued in MD
Practice address
617 W Patrick St
Frederick, MD 21701-4027
Phone
(240) 405-8084
NPI assigned
Oct 23, 2014
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jun 13, 2025

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Nurse Practitioner 363L00000X R186991 MD Primary

Addresses

Primary practice location

617 W Patrick St
Frederick, MD 21701-4027

Mailing address

912 Larch Ave
Takoma Park, MD 20912-5826
Phone (301) 270-8316

Medicare participation

Medicare enrollment files
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: No
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20260204000115 MD Practitioner - Nurse Practitioner 5294213831 Reassigns benefits to 2 organizations
I20260303000138 DC Practitioner - Nurse Practitioner 5294213831 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2023
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Blue Sky Mental Health Clinic LLCGroup PAC ID 4284132176, 5 clinicians
Lake Linganore Psychiatry, PLLCGroup PAC ID 5193255248, 6 clinicians

Practice addresses (Care Compare)

10301 Georgia Ave
Suite 203W
Silver Spring, MD 20902-5020
Phone (240) 865-3135

617 W Patrick St
Suite 223
Frederick, MD 21701-4027
Phone (240) 405-8084

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

State licenses

LicenseStateTypeSpecialty
R186991MDMDNurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Blue Sky Mental Health Clinic LLC CurrentSince Feb 4, 2026 Accepting new patients
Lake Linganore Psychiatry, PLLC CurrentSince Dec 22, 2025 Accepting new patients

Locations

617 W Patrick St
Ste 223
Frederick, MD 21701
Phone (240) 405-8084

10301 Georgia Ave
Ste 203W
Silver Spring, MD 20902
Phone (240) 865-3135

Organizations & group practices 3

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.

NPI Registry JSON

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

{
    "created_epoch": "1414022400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1749772800000",
    "number": "1720483456",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "912 LARCH AVE",
            "city": "TAKOMA PARK",
            "state": "MD",
            "postal_code": "209125826",
            "telephone_number": "301-270-8316"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "617 W PATRICK ST",
            "city": "FREDERICK",
            "state": "MD",
            "postal_code": "217014027",
            "telephone_number": "240-405-8084"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WITKOWSKI",
        "first_name": "DIANE",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2014-10-23",
        "last_updated": "2025-06-13",
        "certification_date": "2025-06-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "MD",
            "license": "R186991",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Frederick, MD

Sources for this page

Verify at the official NPI Registry.