Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alan S Feiner, MD

Hematology & Oncology Physician in Denver, CO · enumerated 2005.

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

National Provider Identifier

1922082643

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Alan S Feiner

Credential MD

Sex Male

Practice address 4700 Hale Pkwy Ste 400, Denver, CO, 80220

Phone (303) 321-0302

Fax (303) 321-9296

Enumeration date Dec 6, 2005

Last updated in NPPES Feb 4, 2025

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License DR.0019819 (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
1199191	Medicaid	CO	-

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 1922082643 active?

Yes, as of the latest NPPES snapshot, NPI 1922082643 is active (record last updated 2025-02-04).

How do I verify Alan Feiner's NPI record?

Cross-check NPI 1922082643 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 2025-02-04.