Active NPI
Ellen Bolotin, MD
- Pediatric Hematology & Oncology Physician
- Duarte, CA
National Provider Identifier
1730289471
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Pediatric Hematology & Oncology Physician
- License
- A54526
- Practice address
- 1500 E Duarte Rd
Duarte, CA 91010 - Phone
- (626) 359-8111
- NPI assigned
- Sep 23, 2006
- Last updated
- Sep 11, 2025
- 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 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Pediatrics Physician | 208000000X | A54526 | CA | |
| Pediatric Hematology & Oncology Physician | 2080P0207X | A54526 | CA | Primary |
Addresses
Primary practice location
1500 E Duarte Rd
Duarte, CA 91010
Mailing address
PO Box 5059
Monrovia, CA 91017
Phone (626) 775-3200
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 00A545260 | Medicaid | CA |
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)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| A54526 | CA | MD | Pediatrics Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| California Cancer Specialists Medical Group | Past | Accepting new patients | |
| California Cancer Specialists Medical Group Inc | Pediatrics | Past | Accepting new patients |
Organizations & group practices 2
Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.
-
dba City of Hope Medical Group
- Clinical Medical Laboratory
- Pasadena, CA
- NPI 1417087933
-
- Anesthesiology Physician
- Duarte, CA
- NPI 1912006636
Pediatrics
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1158969600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757548800000",
"number": "1730289471",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "PO BOX 5059",
"city": "MONROVIA",
"state": "CA",
"postal_code": "91017",
"telephone_number": "626-775-3200",
"fax_number": "626-775-3271"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1500 E DUARTE RD",
"city": "DUARTE",
"state": "CA",
"postal_code": "91010",
"telephone_number": "626-359-8111"
}
],
"practiceLocations": [],
"basic": {
"last_name": "BOLOTIN",
"first_name": "ELLEN",
"name_prefix": "Ms.",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2006-09-23",
"last_updated": "2025-09-11",
"status": "A"
},
"taxonomies": [
{
"code": "208000000X",
"taxonomy_group": "",
"desc": "Pediatrics",
"state": "CA",
"license": "A54526",
"primary": false
},
{
"code": "2080P0207X",
"taxonomy_group": "",
"desc": "Pediatrics, Pediatric Hematology-Oncology",
"state": "CA",
"license": "A54526",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "00A545260",
"state": "CA"
}
],
"endpoints": [],
"other_names": []
}Other providers in Duarte, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.