MARSHALL NATHAN LASSMAN MD NPI 1629040357

NPI Information

NPI: 1629040357
Provider Name: MARSHALL NATHAN LASSMAN, MD
Classification: Internal Medicine - 207RE0101X
Specialization: Endocrinology, Diabetes & Metabolism
Entity Type: Individual
PECOS Registration: Yes
Address: 1000 ASYLUM AVE
STE 4310
HARTFORD, CT
ZIP 06105
Phone: (860) 247-2137

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NPI Details

Marshall Nathan Lassman, MD is an endocrinology and diabetes and metabolism internal medicine in Hartford, CT. The provider is an internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems. Marshall Nathan Lassman, MD NPI is 1629040357. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

The provider's business location address is:

1000 ASYLUM AVE
STE 4310
HARTFORD, CT
ZIP 06105-770
Phone: (860) 247-2137
Fax: (860) 728-0480

The NPI 1629040357 is registered in the Medicare Provider, Enrollment, Chain and Ownership System (PECOS). The provider is legally eligible to order and refer Part B (Clinical Laboratory and Imaging), Durable Medical Equipment, Part A Home Health Agency (HHA), Power Mobility Devices.

The enumeration date for this NPI number is 2/6/2006 and was last updated on 3/7/2023.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No.	Taxonomy Code	Taxonomy Clasification	Taxonomy Specialization	License Number	License State	Primary
1	207R00000X	Internal Medicine		015106	CONNECTICUT	No
2	207RE0101X	Internal Medicine	Endocrinology, Diabetes & Metabolism	015106	CONNECTICUT	No
3	207RE0101X	Internal Medicine	Endocrinology, Diabetes & Metabolism	0015106	CONNECTICUT	Yes

Other Identifiers

The following information regarding additional identifiers associated to this NPI record includes the other identifier number, identifier type, identifier state and issuer.

No.	Other Provider Identifier	Other Provider Identifier Type	Other Provider Identifier State	Other Provider Identifier Issuer
1	010015106CT01	OTHER	CONNECTICUT	BCBS
2	001151067	MEDICAID	CONNECTICUT
3	015106	OTHER	CONNECTICUT	MEDICAL LICENSE

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

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