Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Jonathan Young Ko, MD

Individual provider Anesthesiology Physician · NPI 1801860804

Jonathan Young Ko, MD practises Anesthesiology in Newark, New Jersey. Qualified in 2001, 25 years ago. Practices with Ramapo Anesthesiologists, PC, a 80-clinician group and accepts Medicare assignment. Licensed in New Jersey and New York.

Years since qualifying
25
Licensed in
NJ, NY
In the registry since
2006
Specialties on file
2
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

185 S Orange Ave
Newark, NJ 07103-2757
Phone: (973) 972-5007
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 25MA07926700 (NJ)
Anesthesiology Physician Taxonomy 207L00000X · Licence 231494-1 (NY)

Record details

NPI number1801860804
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedFebruary 15, 2006
Last updated in NPPESJuly 10, 2026
Certification dateJuly 10, 2026

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Group practice Ramapo Anesthesiologists, Pc — 80 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients45
Services billed 56 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Ramapo Anesthesiologists, PC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 80 clinicians in the practice; 12 are shown here.

Other providers in Newark