Active NPI
Douglas McWilliams, MD
- Psychiatry Physician
- Columbia, MD
National Provider Identifier
1851897318
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Psychiatry Physician
- License
- D0102833
- Practice address
- 7330 Grace Dr Ste B
Columbia, MD 21044-3392 - Phone
- (301) 485-6797
- Fax
- (833) 212-1523
- NPI assigned
- Apr 3, 2018
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Psychiatry Physician | 2084P0800X | D0102833 | MD | Primary |
Addresses
Primary practice location
7330 Grace Dr Ste B
Columbia, MD 21044-3392
Mailing address
7330 Grace Dr Ste B
Columbia, MD 21044-3392
Phone (301) 485-6797
Electronic endpoints 1
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| Other URL | https://mcwilliamspsych.com |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
- Opted out of Medicare
- Yes, effective Apr 1, 2026 through Apr 1, 2028
Care Compare profile
Medicare Care Compare- Specialty
- Psychiatry
- Education
- Rush Medical College of Rush University, 2018
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
Practice addresses (Care Compare)
7330 Grace Dr
Suite B
Columbia, MD 21044-3392
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1522713600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1781222400000",
"number": "1851897318",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "7330 GRACE DR STE B",
"city": "COLUMBIA",
"state": "MD",
"postal_code": "210443392",
"telephone_number": "301-485-6797",
"fax_number": "833-212-1523"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "7330 GRACE DR STE B",
"city": "COLUMBIA",
"state": "MD",
"postal_code": "210443392",
"telephone_number": "301-485-6797",
"fax_number": "833-212-1523"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MCWILLIAMS",
"first_name": "DOUGLAS",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2018-04-03",
"last_updated": "2026-06-12",
"certification_date": "2026-06-12",
"status": "A"
},
"taxonomies": [
{
"code": "2084P0800X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Psychiatry",
"state": "MD",
"license": "D0102833",
"primary": true
}
],
"identifiers": [],
"endpoints": [
{
"endpointType": "OTHERS",
"endpointTypeDescription": "Other URL",
"endpoint": "https://mcwilliamspsych.com",
"affiliation": "N",
"endpointDescription": "Practice Website",
"address_1": "7330 Grace Dr Ste B",
"city": "Columbia",
"state": "MD",
"country_code": "US",
"postal_code": "210443392",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": []
}Other providers in Columbia, MD
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 12, 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; Opt Out Affidavits.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.