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GRACE YU YI GU M.D
NPI 1114454899
Family Medicine - Addiction Medicine in New York, NY

Active since May 12, 2017PECOS Enrolled
45 RIVINGTON ST, NEW YORK, NY 10002(332) 243-1000 Get Directions Write a Review

NPPES record last updated: October 30, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Oct 30, 2023, Dec 3, 2021, Sep 30, 2021 and 1 more (4 updates tracked since 2017).

About Grace Yu Yi Gu M.d NPPES

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

GRACE YU YI GU M.D (NPI 1114454899) is an individual addiction medicine provider in New York, New York, licensed in New York (307602) and active in the NPI registry since May 2017. She is enrolled in Medicare PECOS and maintains a secondary practice location in Carson.

NPPES Registry Identity

NPI1114454899
Entity TypeIndividualFemale
Primary Taxonomy207QA0401X
Provider Legal NameGRACE YU YI GUCredential: M.D
Location Address45 RIVINGTON STNew York, NY 10002-1304
Mailing Address45 Rivington StNew York, NY 10002-1304
Phone(332) 243-1000
Sole ProprietorNo
Enumeration DateMay 12, 2017
Last NPPES UpdateOctober 30, 20234 updates tracked since enumeration
NPPES CertifiedOctober 30, 2023
✔ NPI 1114454899 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily Medicine · Addiction MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207QA0401X
License✔ Licensed in NY · 307602
Definition
A family medicine physician who specializes in the diagnosis and treatment of addictions.
45 RIVINGTON ST, New York, NY 10002
Open in Google Maps ↗

Secondary Practice Location 1

Location 123621 Main StCarson, CA 90745-5743 · Phone (310) 513-6707

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Grace Yu Yi Gu M.d is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Grace Gu reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Icahn School Of Medicine At Mount Sinai
5.1 mi
Addiction Medicine
1425 MADISON AVE
New York, NY 10029
  • Reassigned Medicare billing, New York enrollment
  • 385 clinicians in this Medicare group
NPI 1033482518 (212) 987-3100

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10002 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$150.24 typical visit price
range $65.69 – $198.19
Typical copayment $37.56 (range $16.42 – $49.54)
Most-billed visit code 99204
Established Patient
$114.88 typical visit price
range $21.20 – $160.66
Typical copayment $28.72 (range $5.30 – $40.16)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

MEHWISH HINA MD
Psychiatry & Neurology (Psychiatry)
45 RIVINGTON ST
NEW YORK, NY 10002
New York County (332) 243-1800
ALANA BECKER PH.D.
Psychologist
45 RIVINGTON ST
NEW YORK, NY 10002
New York County (332) 243-1747
ROSE KLEIMAN-WEINER MD
Psychiatry & Neurology (Psychiatry)
45 RIVINGTON ST
NEW YORK, NY 10002
New York County (332) 243-1600
ELLA JARVIK MD
Student in an Organized Health Care Education/Training Program
45 RIVINGTON ST
NEW YORK, NY 10002
New York County (332) 243-1611
YOUNGSUN WON
Student in an Organized Health Care Education/Training Program
45 RIVINGTON ST
NEW YORK, NY 10002
New York County (332) 243-1600
LUCY XU MD
Psychiatry & Neurology (Psychiatry)
45 RIVINGTON ST
NEW YORK, NY 10002
New York County (332) 243-1600
RIVINGTON HOUSE DAY TREATMENT PROGRAM
Clinic/Center (Adult Day Care)
45 RIVINGTON ST
NEW YORK, NY 10002
New York County (212) 539-6450
SUNGMIN KRISTY HONG
Student in an Organized Health Care Education/Training Program
45 RIVINGTON ST
NEW YORK, NY 10002
New York County (212) 420-2435

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 Grace Gu's NPI number?

The NPI number for Grace Gu is 1114454899. It was assigned to this individual provider in the NPPES registry on May 12, 2017.

Where is Grace Gu located?

Grace Gu practices at 45 Rivington St, New York, NY 10002. The listed phone number is (332) 243-1000.

What is Grace Gu's specialty?

The primary specialty registered for this NPI is Family Medicine, specializing in Addiction Medicine, with taxonomy code 207QA0401X.

Is Grace Gu enrolled in Medicare?

Yes. Grace Gu is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Grace Gu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Grace Gu reassigns Medicare benefits to Icahn School Of Medicine At Mount Sinai (New York, NY). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Grace Gu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Grace Gu was last updated on October 30, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.