Active NPI
Tammi Thomas Howard, MD
- Internal Medicine Physician
- Largo, MD
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- D0097826
- Practice address
- 1221 Mercantile LN
Largo, MD 20774-5374 - Phone
- (301) 618-5500
- NPI assigned
- Jun 26, 2008
- 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 4
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | MD045398 | DC | |
| Internal Medicine Physician | 207R00000X | D0097826 | MD | Primary |
| Internal Medicine Physician | 207R00000X | 35-097267 | OH | |
| Internal Medicine Physician | 207R00000X | D974006118320 | MN |
Addresses
Primary practice location
1221 Mercantile LN
Largo, MD 20774-5374
Mailing address
130 Sutter St FL 2
San Francisco, CA 94104-4009
Phone (415) 658-6791
Other practice location 1
200 1st St SW
Rochester, MN 55905-0001
Phone (507) 284-2511
Other names 1
- Tammi T Thomas
Electronic endpoints 1
| Type | Endpoint | Use | Affiliation |
|---|---|---|---|
| SOAP URL | https://careepiceast.kp.org:14430/Interconnect-prodmam/wcf/epic.community.hie/xcpdrespondinggatewaysync.svc/ceq | Health Information Exchange (HIE) |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in DC
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 1
Care Compare profile
Medicare Care Compare- Specialty
- Internal Medicine
- Education
- Ohio State University College of Medicine, 2008
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Group practices
Practice addresses (Care Compare)
1221 Mercantile LN
Largo, MD 20774-5374
Phone (301) 618-5700
6104 Old Branch Ave
Temple Hills, MD 20748-2518
Phone (301) 702-6100
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| MD045398 | DC | MD | Internal Medicine Physician |
| D0097826 | MD | MD | Internal Medicine Physician |
| D974006118320 | MN | MD | Internal Medicine Physician |
| 35-097267 | OH | MD | Internal Medicine Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Kaiser Foundation Health Plan of the Mid Atlantic States, Inc | Current | Accepting new patients | |
| Kaiser Foundation Health Plan of the Mid Atlantic States, Inc | Current | Accepting new patients | |
| Kaiser Foundation Health Plan of the Mid Atlantic States, Inc | Internal Medicine | Current | Accepting new patients |
| Frederick Health Hospital Inc | Past | Accepting new patients |
Locations
1221 Mercantile Ln
Upper Marlboro, MD 20774
Phone (301) 618-5500
Organizations & group practices 4
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.
-
dba Kaiser Permanente Annapolis Medical Center
- Health Maintenance Organization
- Annapolis, MD
- NPI 1952461816
DC, Internal Medicine
-
dba Kaiser Permanente Shady Grove Peritoneal Dialysis Facility
- End-Stage Renal Disease (ESRD) Treatment Clinic/Center
- Rockville, MD
- NPI 1962108753
-
dba Kaiser Permanente Capitol Hill Medical Center
- Health Maintenance Organization
- Washington, DC
- NPI 1093016933
-
dba Frederick Health Hospital
- General Acute Care Hospital
- Frederick, MD
- NPI 1538165527
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1214438400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1773705600000",
"number": "1114189560",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "130 SUTTER ST FL 2",
"city": "SAN FRANCISCO",
"state": "CA",
"postal_code": "941044009",
"telephone_number": "415-658-6791",
"fax_number": "415-520-0904"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1221 MERCANTILE LN",
"city": "LARGO",
"state": "MD",
"postal_code": "207745374",
"telephone_number": "301-618-5500"
}
],
"practiceLocations": [
{
"address_1": "200 1st St SW",
"address_purpose": "LOCATION",
"city": "Rochester",
"state": "MN",
"postal_code": "559050001",
"country_code": "US",
"telephone_number": "507-284-2511",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "HOWARD",
"first_name": "TAMMI",
"middle_name": "THOMAS",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2008-06-26",
"last_updated": "2026-03-17",
"certification_date": "2026-03-17",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "DC",
"license": "MD045398",
"primary": false
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "MD",
"license": "D0097826",
"primary": true
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "OH",
"license": "35-097267",
"primary": false
},
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "MN",
"license": "D974006118320",
"primary": false
}
],
"identifiers": [],
"endpoints": [
{
"endpointType": "SOAP",
"endpointTypeDescription": "SOAP URL",
"endpoint": "https://careepiceast.kp.org:14430/Interconnect-prodmam/wcf/epic.community.hie/xcpdrespondinggatewaysync.svc/ceq",
"affiliation": "N",
"endpointDescription": "Carequality",
"use": "HIE",
"useDescription": "Health Information Exchange (HIE)",
"contentType": "OTHER",
"contentTypeDescription": "Other",
"contentOtherDescription": "C-CDA",
"address_1": "1350 Connecticut Ave NW Ste 1250",
"city": "Washington",
"state": "DC",
"country_code": "US",
"postal_code": "200361728",
"country_name": "United States",
"address_type": "DOM"
}
],
"other_names": [
{
"first_name": "TAMMI",
"last_name": "THOMAS",
"middle_name": "T",
"code": "1",
"type": "Former Name"
}
]
}
Other providers in Largo, MD
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 17, 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.