Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Lance King Lassiter, MD

Hematology & Oncology Physician in Montrose, CO · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1639120793

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Registry record

Entity type Individual (Type 1)

Name Mr. Lance King Lassiter

Credential MD

Sex Male

Practice address 816 S 5th St, Montrose, CO, 81401

Phone (970) 497-8001

Fax (970) 240-7793

Enumeration date May 13, 2006

Last updated in NPPES May 8, 2025

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 200401251 (NC) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License DR.0074270 (CO) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
5900530	Medicaid	NC	-
N0125C	Medicaid	SC	-

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1639120793 active?

Yes, as of the latest NPPES snapshot, NPI 1639120793 is active (record last updated 2025-05-08).

How do I verify Lance Lassiter's NPI record?

Cross-check NPI 1639120793 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-08.