DR. HEATHER KATZ D.O.
NPI 1740670397
Internal Medicine - Hematology & Oncology in Sleepy Hollow, NY
About Dr. Heather Katz D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HEATHER KATZ D.O. (NPI 1740670397) is an individual hematology & oncology provider in Sleepy Hollow, New York, licensed in New York (297925-1) and active in the NPI registry since February 2015. She is enrolled in Medicare PECOS, is affiliated with Morristown Medical Center, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Other Identifiers 1
Accepted 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
Dr. Heather Katz D.o. 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
3Medicare enrollment records show Heather Katz reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Great Neck, NY 11021
- Reassigned Medicare billing, New York enrollment
- 9,353 clinicians in this Medicare group
New Hyde Park, NY 11042
- Reassigned Medicare billing, New York enrollment
- 198 clinicians in this Medicare group
Morristown, NJ 07960
- Reassigned Medicare billing, New Jersey enrollment
- 1,699 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 7
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Morristown Medical Center
Acute Care Hospitals · Morristown, NJOverlook Medical Center
Acute Care Hospitals · Summit, NJCooperman Barnabas Medical Center
Acute Care Hospitals · Livingston, NJNorthern Westchester Hospital
Acute Care Hospitals · Mount Kisco, NYPhelps Hospital
Acute Care Hospitals · Sleepy Hollow, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 10591 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SLEEPY HOLLOW, NY 10591
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 Heather Katz's NPI number?
The NPI number for Heather Katz is 1740670397. It was assigned to this individual provider in the NPPES registry on February 3, 2015.
Where is Heather Katz located?
Heather Katz practices at 777 N Broadway Ste 102, Sleepy Hollow, NY 10591. The listed phone number is (914) 366-1625.
What is Heather Katz's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Heather Katz enrolled in Medicare?
Yes. Heather Katz 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 Heather Katz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Heather Katz reassigns Medicare benefits to 3 organizations: North Shore-Lij Medical PC (Great Neck, NY), North Shore Health System Medical Faculty Group Practice Inc (New Hyde Park, NY) and Practice Associates Medical Group (Morristown, NJ). 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 Heather Katz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Heather Katz accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Heather Katz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Heather Katz affiliated with any hospitals?
According to CMS data, Heather Katz is affiliated with Morristown Medical Center, Overlook Medical Center, Cooperman Barnabas Medical Center, Northern Westchester Hospital and Phelps Hospital.
When was this NPI record last updated?
The NPPES record for Heather Katz was last updated on November 6, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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. Heather Katz, D.O. · NPI 1740670397
Hematology & Oncology physician in Sleepy Hollow, New York. Individual provider, active in the CMS NPPES registry since February 3, 2015.
## Identity
- **NPI:** 1740670397 (Entity type: Individual)
- **Enumerated:** February 3, 2015
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 297925-1 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 777 N BROADWAY STE 102, Sleepy Hollow, NY 10591
- **Phone:** (914) 366-1625 · **Fax:** (914) 366-1603
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): North Shore-Lij Medical PC (NPI 1053688572, Great Neck, NY); North Shore Health System Medical Faculty Group Practice Inc (NPI 1003409061, New Hyde Park, NY); Practice Associates Medical Group (NPI 1427016385, Morristown, NJ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rocky Vista University College Of Osteopathic Med, class of 2012
## Record status
- **NPPES last updated:** November 6, 2019
- **Other identifiers:** Medicaid 63006570 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1740670397) · Data from the CMS NPPES public registry.