Active NPI
Peter Gallagher, MD
- Psychiatry Physician
- Merrillville, IN
National Provider Identifier
1174517841
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Psychiatry Physician
- License
- 01059467A
- Practice address
- 8555 Taft St
Merrillville, IN 46410-6123 - Phone
- (219) 769-4005
- Fax
- (219) 769-2508
- NPI assigned
- Sep 8, 2005
- Sex
- Male
- Sole proprietor
- No
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 | 01059467A | IN | Primary |
Addresses
Primary practice location
8555 Taft St
Merrillville, IN 46410-6123
Mailing address
8400 Louisiana St
Merrillville, IN 46410-6385
Phone (219) 757-1928
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 000000342636 | Other | IN | ANTHEM BC/BS |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 01059467A | IN | MD | Psychiatry Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1126137600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1174517841",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "8400 LOUISIANA ST",
"city": "MERRILLVILLE",
"state": "IN",
"postal_code": "464106385",
"telephone_number": "219-757-1928",
"fax_number": "219-757-1950"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "8555 TAFT ST",
"city": "MERRILLVILLE",
"state": "IN",
"postal_code": "464106123",
"telephone_number": "219-769-4005",
"fax_number": "219-769-2508"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GALLAGHER",
"first_name": "PETER",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-09-08",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "2084P0800X",
"taxonomy_group": "",
"desc": "Psychiatry & Neurology, Psychiatry",
"state": "IN",
"license": "01059467A",
"primary": true
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "ANTHEM BC/BS",
"identifier": "000000342636",
"state": "IN"
}
],
"endpoints": [],
"other_names": []
}Other providers in Merrillville, IN
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.