Active NPI
Piotr L Grojec, M.D.
- Internal Medicine Physician
- District Heights, MD
National Provider Identifier
1639124696
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- D0046671
- Practice address
- 6400 Marlboro Pike
District Heights, MD 20747-2841 - Phone
- (301) 736-7000
- Fax
- (301) 736-6916
- NPI assigned
- May 24, 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 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | D0046671 | MD | Primary |
Addresses
Primary practice location
6400 Marlboro Pike
District Heights, MD 20747-2841
Mailing address
6400 Marlboro Pike
District Heights, MD 20747-2841
Phone (301) 736-7000
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
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| D0046671 | MD | MD | Internal Medicine Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1148428800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1639124696",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "6400 MARLBORO PIKE",
"city": "DISTRICT HEIGHTS",
"state": "MD",
"postal_code": "207472841",
"telephone_number": "301-736-7000",
"fax_number": "301-736-6916"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "6400 MARLBORO PIKE",
"city": "DISTRICT HEIGHTS",
"state": "MD",
"postal_code": "207472841",
"telephone_number": "301-736-7000",
"fax_number": "301-736-6916"
}
],
"practiceLocations": [],
"basic": {
"last_name": "GROJEC",
"first_name": "PIOTR",
"middle_name": "L",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2006-05-24",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "MD",
"license": "D0046671",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in District Heights, MD
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.