Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Edwin Jonathan Chiu, M.D.
Nephrology Physician in Napa, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659392223
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Registry record
Entity type Individual (Type 1)
Name Dr. Edwin Jonathan Chiu
Credential M.D.
Sex Male
Practice address 3230 Beard Rd, Napa, CA, 94558
Phone (707) 253-7005
Fax (707) 253-7268
Enumeration date Jul 21, 2006
Last updated in NPPES Dec 15, 2021
Taxonomy & licenses
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 |
|---|---|---|---|
| A96262 | Other | CA | CA STATE LICENSE |
| 00A962620 | Medicaid | CA | - |
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.
Frequently asked questions
Is NPI 1659392223 active?
Yes, as of the latest NPPES snapshot, NPI 1659392223 is active (record last updated 2021-12-15).
How do I verify Edwin Chiu's NPI record?
Cross-check NPI 1659392223 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Geetha Narayan Nephrology Physician · Napa, CA NPI 1386625754 Stephen Gugenheim Plastic Surgery within the Head & Neck (Otolaryngology) Physician · Napa, CA NPI 1174501340 Debra Trnavsky-Hobbs Hospitalist Physician · Napa, CA NPI 1316990724 Gunnell, M.D., Inc Nephrology Physician · Napa, CA NPI 1255376398 Laurel Antonucci Clinical Social Worker · Napa, CA NPI 1346263761 Maria-Elisa Perez Registered Dietitian · Napa, CA NPI 1073537460 Nagarathna Manjappa Nephrology Physician · Napa, CA NPI 1710093349 George Friedman Family Medicine Physician · Napa, CA NPI 1477647212
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-15.