DR. MARK CARLIN HOMONOFF M.D.
NPI 1003934035
Psychiatry & Neurology - Neurology in Sleepy Hollow, NY
About Dr. Mark Carlin Homonoff M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK CARLIN HOMONOFF M.D. (NPI 1003934035) is an individual neurology provider in Sleepy Hollow, New York, licensed in New York (124360) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS, is affiliated with Mount Sinai St Luke's Roosevelt Hospital, and maintains a secondary practice location in Lafayette.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
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. Mark Carlin Homonoff 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.
Medicare Billing Reassignments
4Medicare enrollment records show Mark Homonoff reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Newyork, NY 10029
- Reassigned Medicare billing, New York enrollment
- 233 clinicians in this Medicare group
Towson, MD 21286
- Reassigned Medicare billing, Maryland enrollment
- 664 clinicians in this Medicare group
Bogalusa, LA 70427
- Reassigned Medicare billing, Louisiana enrollment
- 4,559 clinicians in this Medicare group
Heath, TX 75032
- Reassigned Medicare billing, Texas enrollment
- 3,167 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 3
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.
Mount Sinai St Luke's Roosevelt Hospital
Acute Care Hospitals · New York, 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.
Other Providers at the Same Location NPPES 2
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 Mark Homonoff's NPI number?
The NPI number for Mark Homonoff is 1003934035. It was assigned to this individual provider in the NPPES registry on March 27, 2007.
Where is Mark Homonoff located?
Mark Homonoff practices at 755 N Broadway Ste 417, Sleepy Hollow, NY 10591. The listed phone number is (914) 366-5330.
What is Mark Homonoff's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Mark Homonoff enrolled in Medicare?
Yes. Mark Homonoff 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 Mark Homonoff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Homonoff reassigns Medicare benefits to 4 organizations: Icahn School Of Medicine At Mount Sinai (Newyork, NY), Sinai Hospital Of Baltimore Inc (Towson, MD), Ochsner Clinic LLC (Bogalusa, LA) and Healthtexas Provider Network (Heath, TX). 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 Mark Homonoff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Mark Homonoff affiliated with any hospitals?
According to CMS data, Mark Homonoff is affiliated with Mount Sinai St Luke's Roosevelt Hospital.
When was this NPI record last updated?
The NPPES record for Mark Homonoff was last updated on July 7, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Mark Carlin Homonoff, M.D. · NPI 1003934035
Neurology physician in Sleepy Hollow, New York. Individual provider, active in the CMS NPPES registry since March 27, 2007.
## Identity
- **NPI:** 1003934035 (Entity type: Individual)
- **Enumerated:** March 27, 2007
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** 124360 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 755 N BROADWAY STE 417, Sleepy Hollow, NY 10591-1083
- **Phone:** (914) 366-5330
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Icahn School Of Medicine At Mount Sinai (NPI 1558627844, Newyork, NY); Sinai Hospital Of Baltimore Inc (NPI 1669182499, Towson, MD); Ochsner Clinic LLC (NPI 1366797110, Bogalusa, LA); Healthtexas Provider Network (NPI 1538164116, Heath, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albert Einstein College Of Medicine Of Yeshiva University, class of 1974
## Record status
- **NPPES last updated:** July 7, 2022
- **Other identifiers:** Medicaid 01761100 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1003934035) · Data from the CMS NPPES public registry.