NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lorin G Holst, MD

Addiction Medicine (Internal Medicine) Physician in Knoxville, TN · enumerated 2006 · practices at Tennessee Valley Regional Laboratory.

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

National Provider Identifier

1598859894

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Lorin G Holst
Credential MD
Sex Male
Practice address 930 Adell Ree Park Ln, Knoxville, TN, 37909
Phone (865) 769-2600
Fax (865) 769-2616
Enumeration date Oct 3, 2006
Last updated in NPPES Feb 23, 2017

Taxonomy & licenses

207RA0401X Addiction Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 35814 (TN) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

What is the NPI number for Lorin Holst?
The National Provider Identifier (NPI) for Lorin Holst is 1598859894, a Type 1 (individual) record in the CMS NPPES registry.
Where does Lorin Holst practice?
The practice location on file with NPPES is in Knoxville, TN. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-02-23.