Active NPI
William Arthur Forsyth, MD
- Psychiatry Physician
- Post Falls, ID
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Psychiatry Physician
- License
- M12887
- Practice address
- 784 S Clearwater Loop Ste 8103
Post Falls, ID 83854-9599 - Phone
- (217) 341-3716
- NPI assigned
- Oct 11, 2005
- Last updated
- Sep 1, 2026
- 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 | M12887 | ID | Primary |
Addresses
Primary practice location
784 S Clearwater Loop Ste 8103
Post Falls, ID 83854-9599
Mailing address
784 S Clearwater Loop Ste 8103
Post Falls, ID 83854-9599
Phone (217) 341-3716
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in ID, WA
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Psychiatry
- Education
- Southern Illinois University School of Medicine, 1994
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
104 W 5TH Ave
Spokane, WA 99204-4820
Phone (623) 670-0840
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
- HHS exclusion list flag
- CMS’s directory marks this NPI as on an HHS exclusion list; no matching OIG record was found.
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| M12887 | ID | MD | Psychiatry Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| St Joseph Hospital LLC | Current | Accepting new patients | |
| Spokane Behavioral Health LLC | Current | Accepting new patients | |
| Physician Group of Utah Inc | Past | Accepting new patients | |
| Killian and Associates SC | Psychiatry | Past | Accepting new patients |
| Davis Hospital Holdings, Inc. | Past | Accepting new patients |
Locations
415 6th St
Lewiston, ID 83501
Phone (208) 750-7445
821 21st Ave
Lewiston, ID 83501
Phone (208) 799-3422
104 W 5th Ave
Spokane, WA 99204
Phone (509) 992-1888
Interoperability endpoints
- wforsyth609953@direct.multicare.org
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.
-
dba Inland Northwest Behavioral Health
- Psychiatric Hospital
- Spokane, WA
- NPI 1932698107
-
- Internal Medicine Physician
- Lewiston, ID
- NPI 1205368404
-
- Contractor
- Layton, UT
- NPI 1851333249
-
- Psychiatry Physician
- Springfield, IL
- NPI 1487642708
-
- Specialist
- South Jordan, UT
- NPI 1477676930
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1128988800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1788220800000",
"number": "1467440669",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "784 S CLEARWATER LOOP STE 8103",
"city": "POST FALLS",
"state": "ID",
"postal_code": "838549599",
"telephone_number": "217-341-3716"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "784 S CLEARWATER LOOP STE 8103",
"city": "POST FALLS",
"state": "ID",
"postal_code": "838549599",
"telephone_number": "217-341-3716"
}
],
"practiceLocations": [],
"basic": {
"last_name": "FORSYTH",
"first_name": "WILLIAM",
"middle_name": "ARTHUR",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2005-10-11",
"last_updated": "2026-09-01",
"certification_date": "2026-09-01",
"status": "A"
},
"taxonomies": [
{
"code": "2084P0800X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Psychiatry",
"state": "ID",
"license": "M12887",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Post Falls, ID
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 1, 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.
- 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.