DR. MARTIN SIMON GROSS MD
NPI 1881915833
Urology in New Haven, CT
About Dr. Martin Simon Gross Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARTIN SIMON GROSS MD (NPI 1881915833) is an individual urology provider in New Haven, Connecticut, licensed in Connecticut (86191) and active in the NPI registry since June 2010. He is enrolled in Medicare PECOS, is affiliated with Mary Hitchcock Memorial Hospital, and is a graduate of Other (2010).
NPPES Registry Identity
Specialties & Licenses
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. Martin Simon Gross Md 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 Martin Gross reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Keene, NH 03431
- Reassigned Medicare billing, New Hampshire enrollment
- 2,999 clinicians in this Medicare group
Keene, NH 03431
- Reassigned Medicare billing, New Hampshire enrollment
- 450 clinicians in this Medicare group
Hampstead, NH 03841
- Reassigned Medicare billing, New Hampshire enrollment
- 2,620 clinicians in this Medicare group
Newport, NH 03773
- Reassigned Medicare billing, New Hampshire enrollment
- Also billed through NPI 1639610611 (New Hampshire)
- 219 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mary Hitchcock Memorial Hospital
Acute Care Hospitals · Lebanon, NHCheshire Medical Center
Acute Care Hospitals · Keene, NHNew London Hospital
Critical Access Hospitals · New London, NHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06519 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.
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.
NEW HAVEN, CT 06519
NEW HAVEN, CT 06519
NEW HAVEN, CT 06519
NEW HAVEN, CT 06519
NEW HAVEN, CT 06519
NEW HAVEN, CT 06519
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 Martin Gross's NPI number?
The NPI number for Martin Gross is 1881915833. It was assigned to this individual provider in the NPPES registry on June 14, 2010.
Where is Martin Gross located?
Martin Gross practices at 789 Howard Ave, New Haven, CT 06519. The listed phone number is (203) 785-2815.
What is Martin Gross's specialty?
The primary specialty registered for this NPI is Urology with taxonomy code 208800000X.
Is Martin Gross enrolled in Medicare?
Yes. Martin 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 Martin Gross's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Martin Gross reassigns Medicare benefits to 4 organizations: Dartmouth-Hitchcock Clinic (Keene, NH), Cheshire Medical Center (Keene, NH), Mary Hitchcock Memorial Hospital (Hampstead, NH) and The New London Hospital Association, Inc. (Newport, NH). 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 Martin Gross's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Martin Gross accept?
Health plans from Ambetter from NH Healthy Families, Anthem Blue Cross and Blue Shield, Harvard Pilgrim Health Care and Taro Health list Martin Gross 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 Martin Gross affiliated with any hospitals?
According to CMS data, Martin Gross is affiliated with Mary Hitchcock Memorial Hospital, Cheshire Medical Center and New London Hospital.
When was this NPI record last updated?
The NPPES record for Martin Gross was last updated on August 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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. Martin Simon Gross, MD · NPI 1881915833
Urology physician in New Haven, Connecticut. Individual provider, active in the CMS NPPES registry since June 14, 2010.
## Identity
- **NPI:** 1881915833 (Entity type: Individual)
- **Enumerated:** June 14, 2010
- **Primary specialty:** Urology · taxonomy 208800000X
- **State license:** 86191 (Connecticut)
- **Sole proprietor:** No
## Practice location
- **Address:** 789 HOWARD AVE, New Haven, CT 06519-1304
- **Phone:** (203) 785-2815
## 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): Dartmouth-Hitchcock Clinic (NPI 1174176861, Keene, NH); Cheshire Medical Center (NPI 1093803397, Keene, NH); Mary Hitchcock Memorial Hospital (NPI 1699584219, Hampstead, NH); The New London Hospital Association, Inc. (NPI 1770684672, Newport, NH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** August 6, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1881915833) · Data from the CMS NPPES public registry.