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

Kristen M. Marks, MD

Individual provider Internal Medicine Physician · NPI 1255421426

Kristen M. Marks, MD practises Internal Medicine in New York, New York. Graduated from Columbia University College of Physicians and Surgeons in 1999, 27 years ago. Practices with Weill Medical College of Cornell, a 2,031-clinician group and accepts Medicare assignment. Licensed in New York.

Years since qualifying
27
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
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

525 E 68th St Ste J314
New York, NY 10021-4870 Not confirmed with CMS for 13 years — call before visiting
Phone: (212) 746-2225
Fax: (212) 746-8696
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Infectious Disease Physician (primary) Taxonomy 207RI0200X · Licence 222573 (NY)
Internal Medicine Physician Taxonomy 207R00000X · Licence 222573 (NY)

Record details

NPI number1255421426
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 16, 2006
Last updated in NPPESMarch 27, 2013

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Also practisesINFECTIOUS DISEASE
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 1999 (27 years in practice)
Group practice Weill Medical College Of Cornell — 2031 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients33
Services billed 95 a service is one billed item, such as a visit, a test or a procedure
Average patient age70

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 Weill Medical College of Cornell

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2031 clinicians in the practice; 12 are shown here.

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