DR. DING MARTIN MA MD
NPI 1699031005
Ophthalmology in Norwalk, CT
About Dr. Ding Martin Ma Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DING MARTIN MA MD (NPI 1699031005) is an individual ophthalmology provider in Norwalk, Connecticut, licensed in Connecticut (60376) and active in the NPI registry since April 2012. He is enrolled in Medicare PECOS, is affiliated with Vassar Brothers Medical Center, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
Group Practice 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. Ding Martin Ma 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
2Medicare enrollment records show Ding Ma reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hawthorne, NY 10532
- Reassigned Medicare billing, New York enrollment
- 6 clinicians in this Medicare group
Fishkill, NY 12524
- Reassigned Medicare billing, New York enrollment
- 10 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 15
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.
Vassar Brothers Medical Center
Acute Care Hospitals · Poughkeepsie, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 06851 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.
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.
NORWALK, CT 06851
NORWALK, CT 06851
NORWALK, CT 06851
NORWALK, CT 06851
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 Ding Ma's NPI number?
The NPI number for Ding Ma is 1699031005. It was assigned to this individual provider in the NPPES registry on April 10, 2012.
Where is Ding Ma located?
Ding Ma practices at 761 Main Ave, Norwalk, CT 06851. The listed phone number is (203) 853-9900.
What is Ding Ma's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Ding Ma enrolled in Medicare?
Yes. Ding Ma 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 Ding Ma's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ding Ma reassigns Medicare benefits to 2 organizations: Hudson Valley Eye Associates LLP (Hawthorne, NY) and Hudson Valley Eye Surgeons (Fishkill, 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 Ding Ma's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ding Ma accept?
Health plans from Oscar Health, Oscar Health Insurance, Oscar Health Maintenance Organization of Florida, Oscar Health Plan of North Carolina, Inc and Oscar Health Plan, Inc. and 3 other insurers list Ding Ma 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 Ding Ma affiliated with any hospitals?
According to CMS data, Ding Ma is affiliated with Vassar Brothers Medical Center.
When was this NPI record last updated?
The NPPES record for Ding Ma was last updated on November 26, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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. Ding Martin Ma, MD · NPI 1699031005
Ophthalmology physician in Norwalk, Connecticut. Individual provider, active in the CMS NPPES registry since April 10, 2012.
## Identity
- **NPI:** 1699031005 (Entity type: Individual)
- **Enumerated:** April 10, 2012
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 60376 (Connecticut)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 761 MAIN AVE, Norwalk, CT 06851-1080
- **Phone:** (203) 853-9900
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Hudson Valley Eye Associates LLP (NPI 1386674489, Hawthorne, NY); Hudson Valley Eye Surgeons (NPI 1245297613, Fishkill, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** November 26, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1699031005) · Data from the CMS NPPES public registry.