Dr. Leonard I Leven, MD
Psychiatry & Neurology, Child & Adolescent Psychiatry in Old Greenwich, Connecticut
1821098245- Practice location
- 3 W End Ave, Old Greenwich, CT 06870-1640
- Phone
- 203-637-1486
- Fax
- 203-637-1486
- Last updated
- July 13, 2026
Leonard I Leven is a Psychiatry & Neurology, Child & Adolescent Psychiatry based in Old Greenwich, CT. Leonard I Leven practices in Old Greenwich, CT and has the professional credentials of MD. The NPI Number for Leonard I Leven is 1821098245 and holds a License No. 026744 (CT). The current practice location address for Leonard I Leven is 3 W End Ave, Old Greenwich, CT 06870-1640 and can be reached out via phone at 203-637-1486 and via fax at 203-637-1486.
Provider Profile Details
- NPI Number
- 1821098245
- Provider Name
- Leonard I Leven
- Credential
- MD
- Provider Entity Type
- Individual
- Gender
- Male
- Address
- 3 W End Ave, Old Greenwich, CT 06870-1640
- Phone Number
- 203-637-1486
- Fax Number
- 203-637-1486
- Primary Taxonomy
- Psychiatry & Neurology, Child & Adolescent Psychiatry · 2084P0804X
- Sole Proprietor
- No
- Provider Enumeration Date
- July 28, 2005
- Last Update Date
- July 13, 2026
- NPI Status
- Active
Provider Business Practice Location Address Details
- Address
- 3 W End Ave
Old Greenwich, CT 06870-1640 - City
- Old Greenwich
- State
- Connecticut
- Zip
- 06870-1640
- Phone Number
- 203-637-1486
- Fax Number
- 203-637-1486
Provider Business Mailing Address Details
- Address
- 3 Bayberry RD
Elmsford, NY 10523-1701 - City
- Elmsford
- State
- NY
- Zip
- 10523-1701
- Phone Number
- 914-347-4510
- Fax Number
- 914-347-5020
License Information
- License Number (1)
- 026744
- License State (1)
- CT
- Taxonomy (1)
- Psychiatry & Neurology, Psychiatry · 2084P0800X
- License Number (2)
- 167310
- License State (2)
- NY
- Taxonomy (2)
- Psychiatry & Neurology, Psychiatry · 2084P0800X
- License Number (3)
- 026744
- License State (3)
- CT
- Taxonomy (3)
- Psychiatry & Neurology, Child & Adolescent Psychiatry · 2084P0804X
- License Number (4)
- 167310
- License State (4)
- NY
- Taxonomy (4)
- Psychiatry & Neurology, Child & Adolescent Psychiatry · 2084P0804X · Primary
Legacy Identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| No legacy identifiers (Medicaid, Medicare or plan IDs) are on file for this provider. | |||
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Frequently Asked Questions
What is the NPI number of Dr. Leonard I Leven, MD?
The NPI number of Dr. Leonard I Leven, MD is 1821098245. It was assigned on July 28, 2005 and is currently active in the NPPES registry.
What is the specialty of Dr. Leonard I Leven, MD?
Dr. Leonard I Leven, MD is registered under the primary taxonomy Psychiatry & Neurology, Child & Adolescent Psychiatry (code 2084P0804X), licensed in CT under license number 026744.
Where does Dr. Leonard I Leven, MD practice?
The practice location is 3 W End Ave, Old Greenwich, CT 06870-1640. The office can be reached at 203-637-1486 (phone) or 203-637-1486 (fax).
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit identification number issued to health care providers in the United States by the Centers for Medicare and Medicaid Services (CMS). It is used in HIPAA standard transactions.
How do I verify this NPI record?
This record is sourced from the public NPPES NPI Registry maintained by CMS. You can confirm it by searching NPI 1821098245 directly on the NPPES registry website.