GRACE KOO M.D.
NPI 1255788659
Allergy & Immunology in Nashville, TN

Q: What is Grace Koo's NPI number?

The NPI number for Grace Koo is 1255788659. It was assigned to this individual provider in the NPPES registry on May 16, 2016.

Q: What is Grace Koo's specialty?

The primary specialty registered for this NPI is Allergy & Immunology with taxonomy code 207K00000X.

Q: When was this NPI record last updated?

The NPPES record for Grace Koo was last updated on January 10, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since May 16, 2016PECOS EnrolledAccepts Medicare Assignment

3601 THE VANDERBILT CLINIC, NASHVILLE, TN 37232(615) 936-2000 Get Directions Write a Review

NPPES record last updated: January 10, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 26, 2022, Jun 17, 2020, Oct 28, 2019 and 2 more (5 updates tracked since 2016).

On this page

About Grace Koo M.d. NPPES

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

GRACE KOO M.D. (NPI 1255788659) is an individual allergy & immunology provider in Nashville, Tennessee, licensed in Tennessee (65411) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS, is affiliated with Vanderbilt University Medical Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1255788659

Entity TypeIndividualFemale

Primary Taxonomy207K00000X

Provider Legal NameGRACE KOOCredential: M.D.

Location Address3601 THE VANDERBILT CLINICNashville, TN 37232-6013

Mailing Address3841 Green Hills Village DrNashville, TN 37215-2691

Phone(615) 936-2000

Sole ProprietorYes

Medical School CMSUniversity Of Maryland School Of MedicineGraduated 2016

Enumeration DateMay 16, 2016

Last NPPES UpdateJanuary 10, 20245 updates tracked since enumeration

NPPES CertifiedJanuary 10, 2024

✔ NPI 1255788659 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyAllergy & ImmunologyAllopathic & Osteopathic Physicians

Taxonomy Code207K00000X

License✔ Licensed in TN · 65411

Definition

An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system.

Also ListedInternal MedicineTaxonomy 207R00000X · License 036148471 (IL), 65411 (TN)

Also ListedInternal Medicine · Allergy & ImmunologyTaxonomy 207RA0201X · License 036148471 (IL)

Also ListedHospitalistTaxonomy 208M00000X · License 036148471 (IL)

3601 THE VANDERBILT CLINIC, Nashville, TN 37232

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Secondary Practice Locations 2

Location 13722 Harlem Ave Ste Ll34Riverside, IL 60546 · Phone (708) 783-6566

Location 22611 W End AveNashville, TN 37203-6013 · Phone (615) 936-2727

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Ambetter from Arkansas Health & Wellness, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Grace Koo M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3375834989

PECOS Enrollment IDI20220603001450

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 Reassignments

Medicare enrollment records show Grace Koo reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Vanderbilt University Medical Center

0.5 mi

Internal Medicine

1301 22ND AVE S
Nashville, TN 37232

Reassigned Medicare billing, Tennessee enrollment
4,711 clinicians in this Medicare group

NPI 1104202761 (615) 936-2000

Vanderbilt Health And Williamson Medical Center Clinics And Services,

16 mi

Internal Medicine

919 MURFREESBORO RD
Franklin, TN 37064

Reassigned Medicare billing, Tennessee enrollment
298 clinicians in this Medicare group

NPI 1225135551 (615) 591-9890

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Professional service for multiple injections of allergen 95117

The professional service for multiple injections of allergens involves administering small doses of specific allergens into your body. This is done to help your immune system become less sensitive to them, reducing your allergic reaction over time. It's a safe, effective way to manage allergies.

32 services12 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

24 services17 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Vanderbilt University Medical Center

Acute Care Hospitals · Nashville, TN

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number440039

Location1211 Medical Center DriveNashville, TN 37232 · Davidson County

Emergency services Birthing friendly

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

1 supplier12 claims12 services$14.44 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

1 supplier12 claims12 services$61.89 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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. ENGLISH FLACK MD

Pediatrics (Pediatric Cardiology)