Active NPI
John Michael Lazarus, M.D.
- Nephrology Physician
- Lexington, MA
National Provider Identifier
1528064011
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Nephrology Physician
- License
- 32449
- Practice address
- 95 Hayden Ave
Lexington, MA 02421-7942 - Phone
- (781) 402-9000
- Fax
- (781) 402-9582
- NPI assigned
- Jun 21, 2005
- 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 | 32449 | MA | Primary |
Addresses
Primary practice location
95 Hayden Ave
Lexington, MA 02421-7942
Mailing address
60 Old Colony Rd
Wellesley Hills, MA 02481-2844
Phone (781) 237-2528
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 2001764 | Medicaid | MA |
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 |
|---|---|---|---|
| 32449 | MA | MD | Nephrology Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1119312000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1783900800000",
"number": "1528064011",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "60 OLD COLONY RD",
"city": "WELLESLEY HILLS",
"state": "MA",
"postal_code": "024812844",
"telephone_number": "781-237-2528"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "95 HAYDEN AVE",
"city": "LEXINGTON",
"state": "MA",
"postal_code": "024217942",
"telephone_number": "781-402-9000",
"fax_number": "781-402-9582"
}
],
"practiceLocations": [],
"basic": {
"last_name": "LAZARUS",
"first_name": "JOHN",
"middle_name": "MICHAEL",
"name_prefix": "Dr.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2005-06-21",
"last_updated": "2026-07-13",
"status": "A"
},
"taxonomies": [
{
"code": "207RN0300X",
"taxonomy_group": "",
"desc": "Internal Medicine, Nephrology",
"state": "MA",
"license": "32449",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "2001764",
"state": "MA"
}
],
"endpoints": [],
"other_names": []
}Other providers in Lexington, MA
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.