Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Matthew Michael Miller, DO
Hospitalist Physician in Orange, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1639372360
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Registry record
Entity type Individual (Type 1)
Name Dr. Matthew Michael Miller
Credential DO
Sex Male
Practice address 101 the City Dr S, Orange, CA, 92868
Phone (714) 456-8888
Enumeration date Jun 8, 2007
Last updated in NPPES Nov 7, 2025
Taxonomy & licenses
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License OT011861 (PA) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 20A24335 (CA) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License OS014149 (PA) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 20A24335 (CA) Primary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 34.015407 (OH) Secondary
208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License OS014149 (PA) Secondary
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD.
About the DO 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.
Frequently asked questions
What is the NPI number for Matthew Miller?
The National Provider Identifier (NPI) for Matthew Miller is 1639372360, a Type 1 (individual) record in the CMS NPPES registry.
Where does Matthew Miller practice?
The practice location on file with NPPES is in Orange, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Amir Seifi Medical Physician Assistant · Orange, CA NPI 1548263015 Melvin Seard Urology Physician · Orange, CA NPI 1538163126 Charles Rosen Orthopaedic Surgery of the Spine Physician · Orange, CA NPI 1548264013 Joseph Ruggio Cardiovascular Disease Physician · Orange, CA NPI 1124023163 Kurt Richards Surgical Physician Assistant · Orange, CA NPI 1598760092 Akash Joshi Body Imaging Physician · Orange, CA NPI 1013913490 Arti Gupta Body Imaging Physician · Orange, CA NPI 1770589152 Lucia Webster Certified Registered Nurse Anesthetist · Orange, CA NPI 1073510590
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-07.