Marc Longo, M.D.
NPI 1679559009 · Ophthalmology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Longo, M.D. is a Ophthalmology Physician provider in Houston, TX (NPI 1679559009).
Provider details
- NPI number
- 1679559009
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- J0077 (TX)
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
20 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
571 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 215 | $118 |
| Exam of Visual Field With Limited Testing92081 | 93 | $31 |
| Photography of Content of Eyes92285 | 93 | $24 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 92 | $96 |
| Insertion of Probe Into Nasal Tear Duct68810 | 21 | $188 |
| Removal of Excessive Skin and Fat of Upper Eyelid15823 | 18 | $827 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 155 | 105 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 101 | 81 |
| Cephalexin | 96 | 84 |
| Doxycycline Monohydrate | 29 | 26 |
| Erythromycin Basebrand: Erythromycin | 18 | 16 |
| Prednisolone Acetate | 15 | 11 |
| Moxifloxacin Hclbrand: Moxifloxacin | 12 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$189 across 9 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
- 2005-12-18
- Last updated
- 2013-03-18
Frequently asked questions
- What is Marc Longo's NPI number?
- Marc Longo's National Provider Identifier (NPI) is 1679559009, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Longo's specialty?
- Marc Longo is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Longo located?
- Marc Longo's practice location on file with NPPES is 7500 San Felipe St, Houston, TX 77063-1707.
- What is Marc Longo's phone number?
- The practice phone number listed in the NPPES registry for Marc Longo is (713) 953-9932.
- Does Marc Longo accept Medicare?
- Marc Longo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Longo's NPI active?
- Yes — Marc Longo's NPI (1679559009) is active in the NPPES registry as of the last update on 2013-03-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.