Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John Dieckhoff Jr., M.D.
Hospitalist Physician in Irvine, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1700068152
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Registry record
Entity type Individual (Type 1)
Name Dr. John Dieckhoff Jr.
Credential M.D.
Sex Male
Practice address 16200 Sand Canyon Ave, Irvine, CA, 92618
Phone (949) 610-7245
Fax (657) 241-7720
Enumeration date Nov 28, 2007
Last updated in NPPES Jul 21, 2022
Taxonomy & licenses
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A103281 (CA) Secondary
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 |
|---|---|---|---|
| P00959916 | Other | CA | MEDICARE RAILROAD |
| DG077Y | Other | CA | MEDICARE PIN |
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
What specialty is John Dieckhoff?
John Dieckhoff is registered in NPPES with the primary taxonomy of Hospitalist 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 → Scott Derkum Hospitalist Physician · Irvine, CA NPI 1588660849 Christopher Smith Physician Assistant · Irvine, CA NPI 1285622803 Joseph Gilboy Physician Assistant · Irvine, CA NPI 1851374466 Albert Jin Emergency Medical Services (Emergency Medicine) Physician · Irvine, CA NPI 1790738292 Thomas Ryu Emergency Medical Services (Emergency Medicine) Physician · Irvine, CA NPI 1164477410 Ann Ullrich Emergency Medical Services (Emergency Medicine) Physician · Irvine, CA NPI 1891741609 Steven Lin Emergency Medical Services (Emergency Medicine) Physician · Irvine, CA NPI 1821044082 G. Michael Chun Specialist · Irvine, CA NPI 1578590899
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.