Ding Ma, MD
NPI 1699031005 · Ophthalmology Physician · Norwalk, CT
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ding Ma, MD is a Ophthalmology Physician provider in Norwalk, CT (NPI 1699031005).
Provider details
- NPI number
- 1699031005
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 60376 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,439 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Problem Focused Exam of Visual System92012 | 380 | $93 |
| Established Patient Complete Exam of Visual System92014 | 347 | $132 |
| New Patient Complete Exam of Visual System92004 | 131 | $153 |
| Imaging of Retina92134 | 123 | $42 |
| Extended Exam of the Back Part of the Eye With Retinal Drawing92201 | 89 | $25 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 82 | $42 |
| Removal of Cataract With Insertion of Prosthetic Lens |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 117 | 36 |
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 107 | 101 |
| Prednisolone Acetate | 69 | 60 |
| Moxifloxacin Hclbrand: Moxifloxacin | 52 | 43 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 30 | 18 |
| Bimatoprostbrand: Lumigan | 27 | — |
| Doxycycline Monohydrate | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$344 across 16 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-04-10
- Last updated
- 2018-11-26
Frequently asked questions
- What is Ding Ma's NPI number?
- Ding Ma's National Provider Identifier (NPI) is 1699031005, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ding Ma's specialty?
- Ding Ma is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Ding Ma located?
- Ding Ma's practice location on file with NPPES is 761 Main Ave, Norwalk, CT 06851-1080.
- What is Ding Ma's phone number?
- The practice phone number listed in the NPPES registry for Ding Ma is (203) 853-9900.
- Does Ding Ma accept Medicare?
- Ding Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ding Ma's NPI active?
- Yes — Ding Ma's NPI (1699031005) is active in the NPPES registry as of the last update on 2018-11-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.