Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Nick J Karahalios, MD

Individual provider Internal Medicine Physician · NPI 1255442505

Nick J Karahalios, MD is an Internal Medicine in San Clemente, California. Graduated from Un of California, Irvine, College of Medicine in 1992, 34 years ago. Practices with San Clemente Internal Medical Group Inc, a 2-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
34
Trained at
Un of California, Irvine, College of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

665 Camino De Los Mares Ste 309
San Clemente, CA 92673-2841
Phone: (949) 487-9034
Fax: (949) 493-3721
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G77834 (CA)

Record details

NPI number1255442505
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 31, 2006
Last updated in NPPESMay 27, 2021
Certification dateMay 27, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolUN OF CALIFORNIA, IRVINE, COLLEGE OF MEDICINE
Graduated 1992 (34 years in practice)
Group practice San Clemente Internal Medical Group Inc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Other providers in San Clemente