MR. GARY GROSNER M.D.
NPI 1699768283
Specialist in Buffalo, NY

Q: What is Gary Grosner's NPI number?

The NPI number for Gary Grosner is 1699768283. It was assigned to this individual provider in the NPPES registry on August 29, 2005.

Q: What is Gary Grosner's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Q: When was this NPI record last updated?

The NPPES record for Gary Grosner was last updated on May 7, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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 August 29, 2005PECOS EnrolledAccepts Medicare Assignment

100 HIGH ST, C3, BUFFALO, NY 14203(716) 859-2243(716) 859-2885 Get Directions Write a Review

NPPES record last updated: May 7, 2015. Verified against the NPPES registry weekly; last sync: November 01, 2026.

On this page

About Mr. Gary Grosner M.d. NPPES

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

MR. GARY GROSNER M.D. (NPI 1699768283) is an individual specialist in Buffalo, New York, licensed in New York (1657211) and active in the NPI registry since August 2005. He is enrolled in Medicare PECOS, is affiliated with Kaleida Health, and is a graduate of University Of Connecticut School Of Medicine (1982).

NPPES Registry Identity

NPI1699768283

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameMR. GARY GROSNERCredential: M.D.

Location Address100 HIGH ST, C3Buffalo, NY 14203-1126

Mailing Address100 High St, C3Buffalo, NY 14203-1126 · (716) 859-2243 · Fax (716) 859-2885

Phone(716) 859-2243

Fax(716) 859-2885

Sole ProprietorNo

Medical School CMSUniversity Of Connecticut School Of MedicineGraduated 1982

Enumeration DateAugust 29, 2005

Last NPPES UpdateMay 7, 2015

✔ NPI 1699768283 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in NY · 1657211

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

100 HIGH ST, Buffalo, NY 14203

Open in Google Maps ↗

Other Identifiers 2

Medicare PINJ400070089NY

Medicaid01348136NY

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

Mr. Gary Grosner 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 ID5092761973

PECOS Enrollment IDI20050323001082

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 Gary Grosner reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

General Physician Sub II PLLC

Same address

Specialist

100 HIGH ST, RM C421
Buffalo, NY 14203

Reassigned Medicare billing, New York enrollment
8 clinicians in this Medicare group

NPI 1003174921 (716) 859-7607

Buffalo Cardiac Surgical Associates, LLP

Same address

Thoracic Surgery (Cardiothoracic Vascular Surgery)

100 HIGH ST
Buffalo, NY 14203

Reassigned Medicare billing, New York enrollment
2 clinicians in this Medicare group

NPI 1982792859 (716) 859-2243

General Physician, PC

38 mi

General Practice

3898 VINEYARD DR
Dunkirk, NY 14048

Reassigned Medicare billing, New York enrollment
572 clinicians in this Medicare group

NPI 1093959322 (716) 692-3302

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 5

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.

Coronary artery bypass using artery graft, 1 graft 33533

A coronary artery bypass with one artery graft is a surgical procedure to improve blood flow to your heart. An artery from another part of your body is used to bypass a blocked or narrowed coronary artery. This can help reduce chest pain and risk of heart attack.

30 services30 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

30 services30 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

29 services29 patients

Coronary artery bypass using vein or artery graft, 2 grafts 33518

A coronary artery bypass with 2 grafts is a surgery to improve blood flow to your heart. A surgeon takes a healthy vein or artery from your body and attaches it to the blocked coronary artery. This creates a new path for blood to flow, bypassing the blockage.

17 services17 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

11 services11 patients

Hospital Affiliations CMS Care Compare

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

Kaleida Health

Acute Care Hospitals · Buffalo, NY

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number330005

Location100 High StreetBuffalo, NY 14210 · Erie County

Emergency services Birthing friendly

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.

MS. DENISE MARIE DONAHUE NURSE PRACTITIONER

Nurse Practitioner

100 HIGH ST
BUFFALO, NY 14203

Erie County (716) 859-5600

GENERAL PHYSICIAN SUB II PLLC

Specialist

100 HIGH ST, RM C421
BUFFALO, NY 14203

Erie County (716) 859-7607

DR. MATTHEW KYLE MOSER MD

Student in an Organized Health Care Education/Training Program

100 HIGH ST
BUFFALO, NY 14203

Erie County (716) 218-1000

MIAN MOHAMMAD HAMMAS MD

Hospitalist

100 HIGH ST
BUFFALO, NY 14203

Erie County (716) 859-5600

DR. GUY SHEMESH DUNETZ MD

Student in an Organized Health Care Education/Training Program

100 HIGH ST
BUFFALO, NY 14203

Erie County (716) 859-5600

JILL FRASCO DO

Student in an Organized Health Care Education/Training Program

100 HIGH ST
BUFFALO, NY 14203

Erie County (716) 859-5600

THOMAS WILLIAM JORDAN D.O.

Emergency Medicine

100 HIGH ST
BUFFALO, NY 14203

Erie County (716) 859-1993

KIM HUBER

Registered Nurse (Registered Nurse First Assistant)

100 HIGH ST
BUFFALO, NY 14203

Erie County (716) 859-2741

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 Gary Grosner's NPI number?

The NPI number for Gary Grosner is 1699768283. It was assigned to this individual provider in the NPPES registry on August 29, 2005.

Where is Gary Grosner located?

Gary Grosner practices at 100 High St C3, Buffalo, NY 14203. The listed phone number is (716) 859-2243.

What is Gary Grosner's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Gary Grosner enrolled in Medicare?

Yes. Gary Grosner 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 Gary Grosner's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gary Grosner reassigns Medicare benefits to 3 organizations: General Physician Sub II PLLC (Buffalo, NY), Buffalo Cardiac Surgical Associates, LLP (Buffalo, NY) and General Physician, PC (Dunkirk, 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 Gary Grosner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Gary Grosner affiliated with any hospitals?

According to CMS data, Gary Grosner is affiliated with Kaleida Health.

When was this NPI record last updated?

The NPPES record for Gary Grosner was last updated on May 7, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.