Active NPI
Francis A Marro, M.D.
- Nephrology Physician
- Dover, DE
National Provider Identifier
1669468138
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Nephrology Physician
- License
- C1-0001835
- Practice address
- 748 S New St
Suites C & D
Dover, DE 19904-3573 - Phone
- (302) 734-3227
- Fax
- (302) 734-0391
- NPI assigned
- Sep 21, 2005
- Last updated
- Jul 13, 2026
- 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 |
|---|---|---|---|---|
| Nephrology Physician | 207RN0300X | C1-0001835 | DE | Primary |
Addresses
Primary practice location
748 S New St
Suites C & D
Dover, DE 19904-3573
Mailing address
4923 Ogletown Stanton Rd
Suite 200
Newark, DE 19713-2081
Phone (302) 225-0451
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 0000050901 | Medicaid | DE |
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 |
|---|---|---|---|
| C1-0001835 | DE | MD | Nephrology Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1127260800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1669468138",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "4923 OGLETOWN STANTON RD",
"address_2": "SUITE 200",
"city": "NEWARK",
"state": "DE",
"postal_code": "197132081",
"telephone_number": "302-225-0451",
"fax_number": "302-225-0472"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "748 S NEW ST",
"address_2": "SUITES C & D",
"city": "DOVER",
"state": "DE",
"postal_code": "199043573",
"telephone_number": "302-734-3227",
"fax_number": "302-734-0391"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MARRO",
"first_name": "FRANCIS",
"middle_name": "A",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-09-21",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207RN0300X",
"taxonomy_group": "",
"desc": "Internal Medicine, Nephrology",
"state": "DE",
"license": "C1-0001835",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "0000050901",
"state": "DE"
}
],
"endpoints": [],
"other_names": []
}Other providers in Dover, DE
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.