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

Dr. Young J Ko, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1639277130

Dr. Young J Ko, MD is an Internal Medicine in Lancaster, California. Qualified in 1973, 53 years ago. Practices with Av Critical Care Inc, a 12-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
53
Licensed in
CA
In the registry since
2006
Specialties on file
3
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

44215 15th St W Ste 303
Lancaster, CA 93534
Phone: (661) 945-0723
Fax: (661) 949-5740
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A39814 (CA)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence A39814 (CA)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence A39814 (CA)

Record details

NPI number1639277130
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 20, 2006
Last updated in NPPESSeptember 11, 2025
Mailing address44215 15th St West, Suite 303, Lancaster, CA 93534

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesCRITICAL CARE (INTENSIVISTS), PULMONARY DISEASE, SLEEP MEDICINE
Medical schoolOTHER
Graduated 1973 (53 years in practice)
Group practice Av Critical Care Inc — 12 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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