Active NPI
Jack Keiser, FNP
- Family Nurse Practitioner
- Nashville, TN
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Family Nurse Practitioner
- License
- 95018639
- Practice address
- 41 Peabody St
Nashville, TN 37210-2125 - Phone
- (615) 420-7515
- Fax
- (615) 420-7515
- NPI assigned
- Nov 1, 2018
- 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 3
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Family Nurse Practitioner | 363LF0000X | 95018639 | CA | Primary |
| Family Nurse Practitioner | 363LF0000X | APRN11042755 | FL | |
| Family Nurse Practitioner | 363LF0000X | 24976 | TN |
Addresses
Primary practice location
41 Peabody St
Nashville, TN 37210-2125
Mailing address
9300 Arrowhead CT
Brentwood, TN 37027-7477
Phone (615) 775-7720
Other practice location 1
611 Gateway Blvd Ste 120
South San Francisco, CA 94080-7066
Phone (650) 761-4056
Other practice location 2
333 SE 2nd Ave Ste 2000
Miami, FL 33131-2185
Phone (650) 761-4056
Other practice location 3
2513 White Ave Apt 7
Nashville, TN 37204-2731
Phone (615) 420-7515
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in TN, CA, TX, FL
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: No
Enrollment records 4
Care Compare profile
Medicare Care Compare- Specialty
- Nurse Practitioner
- Education
- Other, 2018
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
- Group practices
Practice addresses (Care Compare)
1800 Medical Ctr Pkwy
Suite 400
Murfreesboro, TN 37129-2567
Phone (615) 284-2015
611 Gateway Blvd
Suite 120
South San Francisco, CA 94080-7066
Phone (650) 761-4056
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Nurse Practitioner
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 95018639 | CA | MD | Family Nurse Practitioner |
| APRN11042755 | FL | MD | Family Nurse Practitioner |
| 24976 | TN | MD | Family Nurse Practitioner |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Dreem Sleep Clinic, P.a. | Current | Accepting new patients | |
| Saint Thomas Medical Partners | Current | Accepting new patients | |
| Dreem Health Sleep Clinic, P.a. | Current | Accepting new patients | |
| Dreem Sleep Clinic of California | Current | Accepting new patients |
Locations
611 Gateway Blvd
Ste 120
South San Francisco, CA 94080
Phone (650) 480-6023
333 SE 2nd Ave
Ste 2000
Miami, FL 33131
Phone (201) 581-3411
121 W 36th St
#237
New York, NY 10018
Phone (650) 761-4056
1800 Medical Center Pkwy
Ste 400
Murfreesboro, TN 37129
Phone (615) 396-6800
300 20th Ave N
Fl 9
Nashville, TN 37203
1911 State St
Nashville, TN 37203
Phone (615) 284-2015
300 20th Ave N
Ste 403
Nashville, TN 37203
Phone (615) 284-4088
2021 Guadalupe St
Austin, TX 78705
Phone (512) 469-2968
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.
-
- Internal Medicine Physician
- Nashville, TN
- NPI 1437194669
-
- Multi-Specialty Clinic/Center
- South San Francisco, CA
- NPI 1750049029
-
- Multi-Specialty Clinic/Center
- Miami, FL
- NPI 1497549158
-
- Multi-Specialty Clinic/Center
- Austin, TX
- NPI 1437971611
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1541030400000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1776297600000",
"number": "1104393651",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "9300 ARROWHEAD CT",
"city": "BRENTWOOD",
"state": "TN",
"postal_code": "370277477",
"telephone_number": "615-775-7720"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "41 PEABODY ST",
"city": "NASHVILLE",
"state": "TN",
"postal_code": "372102125",
"telephone_number": "615-420-7515",
"fax_number": "615-420-7515"
}
],
"practiceLocations": [
{
"address_1": "611 Gateway Blvd Ste 120",
"address_purpose": "LOCATION",
"city": "South San Francisco",
"state": "CA",
"postal_code": "940807066",
"country_code": "US",
"telephone_number": "650-761-4056",
"country_name": "United States",
"address_type": "DOM"
},
{
"address_1": "333 SE 2nd Ave Ste 2000",
"address_purpose": "LOCATION",
"city": "Miami",
"state": "FL",
"postal_code": "331312185",
"country_code": "US",
"telephone_number": "650-761-4056",
"country_name": "United States",
"address_type": "DOM"
},
{
"address_1": "2513 White Ave Apt 7",
"address_purpose": "LOCATION",
"city": "Nashville",
"state": "TN",
"postal_code": "372042731",
"country_code": "US",
"telephone_number": "615-420-7515",
"fax_number": "615-420-7515",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "KEISER",
"first_name": "JACK",
"credential": "FNP",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2018-11-01",
"last_updated": "2026-04-16",
"certification_date": "2026-04-16",
"status": "A"
},
"taxonomies": [
{
"code": "363LF0000X",
"taxonomy_group": "",
"desc": "Nurse Practitioner, Family",
"state": "CA",
"license": "95018639",
"primary": true
},
{
"code": "363LF0000X",
"taxonomy_group": "",
"desc": "Nurse Practitioner, Family",
"state": "FL",
"license": "APRN11042755",
"primary": false
},
{
"code": "363LF0000X",
"taxonomy_group": "",
"desc": "Nurse Practitioner, Family",
"state": "TN",
"license": "24976",
"primary": false
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}
Other providers in Nashville, TN
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 16, 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.