Jay K. Harness, M.D.
Jay K. Harness is a Surgery Physician provider (Surgery) practicing in Orange, CA, registered in the NPPES registry with NPI 1477549426 since 2005. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1477549426 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Jay K. Harness |
| Credential | M.D. |
| Sex | Male |
| Practice address | Orange, CA, 92868 |
| Phone | 7147448601 |
| Fax | 7147448622 |
| Enumeration date | 2005-09-26 |
| Last updated in NPPES | 2008-12-01 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 208600000X | Surgery Physician | Primary | G70155 | CA |
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 |
|---|---|---|---|
| 00G701550 | Other | — | BLUE SHIELD OF CA |
| 00G701550 | Medicaid | CA | — |
| 00G701550 | Other | — | CALOPTIMA |
| P00075153 | Other | — | RAILROAD MEDICARE |
Copy-ready billing details
Provider: Jay Harness, M.D. NPI: 1477549426 Taxonomy: 208600000X (Surgery Physician) Address: Orange, CA, 92868
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1205838257 | Jay K Harness MD A Medical Corporation | Organization | Surgery Physician | Orange, CA |
| 1649203597 | John Maurice | Individual | Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician | Orange, CA |
| 1467479949 | Kimberly Banks | Individual | Genetic Counselor (M.S.) | Orange, CA |
| 1306002878 | Autumn Tran | Individual | Family Nurse Practitioner | Orange, CA |
| 1609106657 | Aura Janze | Individual | Genetic Counselor (M.S.) | Orange, CA |
| 1699098608 | Carmen Walker | Individual | Nurse Practitioner | Orange, CA |
| 1053659961 | Timotea Lara | Individual | Nurse Practitioner | Orange, CA |
| 1962744185 | Enza Esposito-Nguyen | Individual | Oncology Registered Nurse | Orange, CA |
Verify this record
Cross-check NPI 1477549426 against the authoritative CMS record: view Jay K. Harness on the official NPPES registry .
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 or validate an NPI number.
Frequently asked questions
What is the NPI number for Jay Harness?
Where does Jay Harness practice?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2008-12-01.