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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

DR. CRYSTAL SIXIAN LIU M.D.
NPI 1689598559
Internal Medicine - Gastroenterology in New York, NY

Active since August 05, 2026
ONE GUSTAVE L. LEVY PLACE, NEW YORK, NY 10029(212) 241-4299(212) 731-5220 Get Directions Write a Review

NPPES record added: August 5, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Crystal Sixian Liu M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. CRYSTAL SIXIAN LIU M.D. (NPI 1689598559) is an individual gastroenterology provider in New York, New York, licensed in New York (P143805) and active in the NPI registry since August 2026.

NPPES Registry Identity

NPI1689598559
Entity TypeIndividualFemale
Primary Taxonomy207RG0100X
Provider Legal NameDR. CRYSTAL SIXIAN LIUCredential: M.D.
Location AddressONE GUSTAVE L. LEVY PLACENew York, NY 10029
Mailing AddressOne Gustave L. Levy PlaceNew York, NY 10029 · (212) 241-4299 · Fax (212) 731-5220
Phone(212) 241-4299
Fax(212) 731-5220
Sole ProprietorYes
Enumeration DateAugust 5, 2026
✔ NPI 1689598559 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in NY · P143805
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
ONE GUSTAVE L. LEVY PLACE, New York, NY 10029
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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ANNE YIN MDCM
Student in an Organized Health Care Education/Training Program
ONE GUSTAVE L. LEVY PLACE, DEPARTMENT OF UROLOGY, THE ICAHN SCHOOL OF MEDICINE AT
NEW YORK, NY 10029
New York County (917) 763-5913
DR. ROBERT S. COPELAND-HALPERIN M.D.
Internal Medicine (Cardiovascular Disease)
ONE GUSTAVE L. LEVY PLACE, MOUNT SINAI
NEW YORK, NY 10029
New York County (212) 659-8551
ERIC BEAN MD
Student in an Organized Health Care Education/Training Program
ONE GUSTAVE L. LEVY PLACE, DEPARTMENT OF PSYCHIATRY
NEW YORK, NY 10029
New York County (212) 523-4000
MS. MAURA B ELESPURU NP
Nurse Practitioner (Family)
ONE GUSTAVE L. LEVY PLACE, MOUNT SINAI HOSPITAL
NEW YORK, NY 10029
New York County (212) 241-6768
GISELA GONZALEZ MD
Student in an Organized Health Care Education/Training Program
ONE GUSTAVE L. LEVY PLACE, BOX 1259
NEW YORK, NY 10029
New York County (212) 241-5972
BRENDAN DAVID ROSS
Psychiatry & Neurology (Psychiatry)
ONE GUSTAVE L. LEVY PLACE
NEW YORK, NY 10029
New York County (212) 659-8734
SARAH JACQUELINE NESSEN
Student in an Organized Health Care Education/Training Program
ONE GUSTAVE L. LEVY PLACE, DEPARTMENT OF MEDICINE BOX #1118
NEW YORK, NY 10029
New York County (646) 596-0029
SAMANTHA AYCART PA-C
Physician Assistant
ONE GUSTAVE L. LEVY PLACE
NEW YORK, NY 10029
New York County (212) 241-6500

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Crystal Liu's NPI number?

The NPI number for Crystal Liu is 1689598559. It was assigned to this individual provider in the NPPES registry on August 5, 2026.

Where is Crystal Liu located?

Crystal Liu practices at One Gustave L. Levy Place, New York, NY 10029. The listed phone number is (212) 241-4299.

What is Crystal Liu's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for Crystal Liu was last updated on August 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.