Active NPI
Francis X Walsh, M.D.
- Internal Medicine Physician
- Cos Cob, CT
National Provider Identifier
1124174347
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Internal Medicine Physician
- License
- 14105
- Practice address
- 35 River Rd
Suite 200
Cos Cob, CT 06807-2717 - Phone
- (203) 661-9433
- Fax
- (203) 661-2918
- NPI assigned
- Jan 29, 2007
- Sex
- Male
- Sole proprietor
- Yes
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 |
|---|---|---|---|---|
| Internal Medicine Physician | 207R00000X | 14105 | CT | Primary |
| Nephrology Physician | 207RN0300X | 14105 | CT |
Addresses
Primary practice location
35 River Rd
Suite 200
Cos Cob, CT 06807-2717
Mailing address
35 River Rd
Suite 200
Cos Cob, CT 06807-2717
Phone (203) 661-9433
Other identifiers 2
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 010014105CT02 | Other | CT | ANTHEM BLUE CROSS |
| 00516867 | Medicaid | NY |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in NY, CT
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Nephrology
- Education
- New York Medical College, 1967
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
- Group practices
- Rehabilitation Associates Inc
Practice addresses (Care Compare)
1931 Black Rock Tpke
Fairfield, CT 06825-3506
Phone (203) 384-8681
31 River Rd
Suite 200
Cos Cob, CT 06807-2152
Phone (203) 661-9433
787 King St
Rye Brook, NY 10573-1225
Phone (914) 937-5800
Hospital & facility affiliations
- Sterling Care LLC
- Visiting Nurse & Hospice of Fairfield County, Inc
- Constellation Home Care
- Health Care Connectors LLC
- Elara Caring
- Constellation Home Care
- Caring Hospice Services of Connecticut LLC
- Visiting Nurse & Hospice of Fairfield County, Inc
- Greenwich Hospital Association -
- Burke Rehabilitation Hospital
- Nathaniel Witherell, the
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Removal of tissue | 22 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 14105 | CT | MD | Psychiatric/Mental Health Nurse Practitioner |
Interoperability endpoints
- francis.walsh.1@13544.direct.athenahealth.com
Organizations & group practices 1
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.
Hospital & facility affiliations 11
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- Community Based Hospice Care Agency
- Stamford, CT
- NPI 1245599398
-
- Home Health Agency
- Norwalk, CT
- NPI 1194997791
-
- Community Based Hospice Care Agency
- Orange, CT
- NPI 1417239088
-
- General Acute Care Hospital
- Greenwich, CT
- NPI 1609846088
-
- Home Health Agency
- Greenwich, CT
- NPI 1265056212
-
- Home Health Agency
- Rocky Hill, CT
- NPI 1255333597
-
- Home Health Agency
- Greenwich, CT
- NPI 1811124951
-
- Home Health Agency
- Wilton, CT
- NPI 1720080690
-
- Community Based Hospice Care Agency
- Wilton, CT
- NPI 1982606869
Home health agency
-
- Rehabilitation Hospital
- White Plains, NY
- NPI 1841295219
Inpatient rehabilitation facility
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1170028800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1757548800000",
"number": "1124174347",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "35 RIVER RD",
"address_2": "SUITE 200",
"city": "COS COB",
"state": "CT",
"postal_code": "068072717",
"telephone_number": "203-661-9433",
"fax_number": "203-661-2918"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "35 RIVER RD",
"address_2": "SUITE 200",
"city": "COS COB",
"state": "CT",
"postal_code": "068072717",
"telephone_number": "203-661-9433",
"fax_number": "203-661-2918"
}
],
"practiceLocations": [],
"basic": {
"last_name": "WALSH",
"first_name": "FRANCIS",
"middle_name": "X",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2007-01-29",
"last_updated": "2025-09-11",
"status": "A"
},
"taxonomies": [
{
"code": "207R00000X",
"taxonomy_group": "",
"desc": "Internal Medicine",
"state": "CT",
"license": "14105",
"primary": true
},
{
"code": "207RN0300X",
"taxonomy_group": "",
"desc": "Internal Medicine, Nephrology",
"state": "CT",
"license": "14105",
"primary": false
}
],
"identifiers": [
{
"code": "01",
"desc": "Other (non-Medicare)",
"issuer": "ANTHEM BLUE CROSS",
"identifier": "010014105CT02",
"state": "CT"
},
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "00516867",
"state": "NY"
}
],
"endpoints": [],
"other_names": []
}Other providers in Cos Cob, CT
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.
- 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.