Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Jonnel Ramos Constantino, M.D.
Hospitalist Physician in Orange, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1124246350
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Registry record
Entity type Individual (Type 1)
Name Dr. Jonnel Ramos Constantino
Credential M.D.
Sex Male
Practice address 1800 E Heim Ave, Unit 18, Orange, CA, 92865
Phone (909) 427-5310
Fax (909) 427-4107
Enumeration date Apr 23, 2007
Last updated in NPPES Dec 6, 2021
Taxonomy & licenses
208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License A89569 (CA) 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.
Frequently asked questions
What specialty is Jonnel Constantino?
Jonnel Constantino 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.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-06.