Active NPI
Annette Marie Vonthun, MD
- Internal Medicine Physician
- Bethesda, MD
National Provider Identifier
1952365934
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- L-12463R
- Practice address
- 8901 Wisconsin Ave
Bethesda, MD 20889-0001 - Phone
- (301) 295-4611
- NPI assigned
- Apr 14, 2006
- Sex
- Female
- 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 | L-12463R | LA | Primary |
Addresses
Primary practice location
8901 Wisconsin Ave
Bethesda, MD 20889-0001
Mailing address
4910 Cloister Dr
Rockville, MD 20852-3362
Phone (301) 530-0823
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 |
|---|---|---|---|
| L-12463R | LA | MD | Internal Medicine Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1144972800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1952365934",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "4910 CLOISTER DR",
"city": "ROCKVILLE",
"state": "MD",
"postal_code": "208523362",
"telephone_number": "301-530-0823"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "8901 WISCONSIN AVE",
"city": "BETHESDA",
"state": "MD",
"postal_code": "208890001",
"telephone_number": "301-295-4611"
}
],
"practiceLocations": [],
"basic": {
"last_name": "VONTHUN",
"first_name": "ANNETTE",
"middle_name": "MARIE",
"name_prefix": "Dr.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2006-04-14",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "LA",
"license": "L-12463R",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Bethesda, 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.