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

Dr. Iryna Anatoliyevna Falkenstein, M.D.

Glaucoma Specialist (Ophthalmology) Physician in Oakland, CA · enumerated 2009 · practices at Crystal Le, MD Corporation.

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

National Provider Identifier

1639303118

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Iryna Anatoliyevna Falkenstein

Credential M.D.

Sex Female

Practice address Oakland, CA, 94609

Phone (510) 763-9775

Enumeration date May 12, 2009

Last updated in NPPES Jul 6, 2018

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

Taxonomy & licenses

207WX0009X Glaucoma Specialist (Ophthalmology) Physician Allopathic & Osteopathic Physicians · License C145657 (CA) Primary

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License 254349 (MA) Secondary

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

How do I verify Iryna Falkenstein's NPI record?

Cross-check NPI 1639303118 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1639303118 active?

Yes, as of the latest NPPES snapshot, NPI 1639303118 is active (record last updated 2018-07-06).

Other providers at this practice address

Browse all →

Crystal Le Glaucoma Specialist (Ophthalmology) Physician · Oakland, CA NPI 1447678941 Crystal Le, MD Corporation Glaucoma Specialist (Ophthalmology) Physician · Oakland, CA NPI 1902520521

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-07-06.