Active NPI
Mark L Grothmann, ATC
- Respiratory/Developmental/Rehabilitative Specialist/Technologist
- West Chester, PA
National Provider Identifier
1942273271
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Respiratory/Developmental/Rehabilitative Specialist/Technologist
- License
- RT000133A
- Practice address
- 450 Ellis LN
West Chester, PA 19380-5123 - Phone
- (484) 266-3938
- NPI assigned
- Feb 8, 2006
- 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 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Respiratory/Developmental/Rehabilitative Specialist/Technologist | 225500000X | RT000133A | PA | Primary |
| Athletic Trainer | 2255A2300X | RT000133A | PA |
Addresses
Primary practice location
450 Ellis LN
West Chester, PA 19380-5123
Mailing address
307 N Chester Rd
West Chester, PA 19380-6622
Phone (610) 429-2400
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)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| RT000133A | PA | MD | Respiratory/Developmental/Rehabilitative Specialist/Technologist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1139356800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1942273271",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "307 N CHESTER RD",
"city": "WEST CHESTER",
"state": "PA",
"postal_code": "193806622",
"telephone_number": "610-429-2400"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "450 ELLIS LN",
"city": "WEST CHESTER",
"state": "PA",
"postal_code": "193805123",
"telephone_number": "484-266-3938"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GROTHMANN",
"first_name": "MARK",
"middle_name": "L",
"credential": "ATC",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-02-08",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "225500000X",
"taxonomy_group": "",
"desc": "Specialist/Technologist",
"state": "PA",
"license": "RT000133A",
"primary": true
},
{
"code": "2255A2300X",
"taxonomy_group": "",
"desc": "Specialist/Technologist, Athletic Trainer",
"state": "PA",
"license": "RT000133A",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in West Chester, PA
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.