NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Oliver Pimentel Diamante, M.D

Infectious Disease Physician in Valparaiso, IN · enumerated 2010 · practices at Advanced Family Psychiatry LLC.

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

National Provider Identifier

1669781050

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. Oliver Pimentel Diamante
Credential M.D
Sex Male
Practice address Valparaiso, IN, 46383
Phone (219) 548-0160
Enumeration date Oct 1, 2010
Last updated in NPPES Sep 2, 2015

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MT197688 (PA) Secondary
207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 01074730A (IN) 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 specialty is Oliver Diamante?
Oliver Diamante is registered in NPPES with the primary taxonomy of Infectious Disease Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-02.