DR. LIAM GROSS DO
NPI 1578862769
Internal Medicine - Pulmonary Disease in Brooklyn, NY
About Dr. Liam Gross Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LIAM GROSS DO (NPI 1578862769) is an individual pulmonary disease provider in Brooklyn, New York, licensed in New York (288137) and active in the NPI registry since March 2011. He is enrolled in Medicare PECOS, is affiliated with Nyack Hospital, and is a graduate of New York College Of Osteo Medicine Of New York Institute Of Technology (2011).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. Liam Gross Do 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.
Medicare Billing Reassignments
5Medicare enrollment records show Liam Gross reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Brooklyn, NY 11215
- Reassigned Medicare billing, New York enrollment
- 1,029 clinicians in this Medicare group
New York, NY 10021
- Reassigned Medicare billing, New York enrollment
- 80 clinicians in this Medicare group
Nyack, NY 10960
- Reassigned Medicare billing, New York enrollment
- 119 clinicians in this Medicare group
Nyack, NY 10960
- Reassigned Medicare billing, New York enrollment
- 130 clinicians in this Medicare group
Newburgh, NY 12550
- Reassigned Medicare billing, New York enrollment
- 110 clinicians in this Medicare group
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 11
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Nyack Hospital
Acute Care Hospitals · Nyack, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 11215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
BROOKLYN, NY 11215
BROOKLYN, NY 11215
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 Liam Gross's NPI number?
The NPI number for Liam Gross is 1578862769. It was assigned to this individual provider in the NPPES registry on March 28, 2011.
Where is Liam Gross located?
Liam Gross practices at 506 6th St, Brooklyn, NY 11215. The listed phone number is (718) 780-5835.
What is Liam Gross's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Liam Gross enrolled in Medicare?
Yes. Liam Gross is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Liam Gross's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Liam Gross reassigns Medicare benefits to 5 organizations: Kings Physician Services, PC (Brooklyn, NY), Weill Medical College Of Cornell (New York, NY), Montefiore Nyack Hospital (Nyack, NY), White Plains Medical Diagnostic Services, PC (Nyack, NY) and Critical Care Physician Of New York PC (Newburgh, NY). Each 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 Liam Gross's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Liam Gross affiliated with any hospitals?
According to CMS data, Liam Gross is affiliated with Nyack Hospital.
When was this NPI record last updated?
The NPPES record for Liam Gross was last updated on January 27, 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.
# Dr. Liam Gross, DO · NPI 1578862769
Pulmonary Disease physician in Brooklyn, New York. Individual provider, active in the CMS NPPES registry since March 28, 2011.
## Identity
- **NPI:** 1578862769 (Entity type: Individual)
- **Enumerated:** March 28, 2011
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **State license:** 288137 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 506 6TH ST, Brooklyn, NY 11215-3609
- **Phone:** (718) 780-5835
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Kings Physician Services, PC (NPI 1326698879, Brooklyn, NY); Weill Medical College Of Cornell (NPI 1285742122, New York, NY); Montefiore Nyack Hospital (NPI 1073881835, Nyack, NY); White Plains Medical Diagnostic Services, PC (NPI 1689955338, Nyack, NY); Critical Care Physician Of New York PC (NPI 1316293954, Newburgh, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York College Of Osteo Medicine Of New York Institute Of Technology, class of 2011
## Record status
- **NPPES last updated:** January 27, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1578862769) · Data from the CMS NPPES public registry.