Dr. Marc Narciso Longo, MD
- Medicare services, 2024
- 571
- Medicare patients, 2024
- 297
- Part D claims, 2024
- 481
- MIPS score, 2024
- 97
- Industry payments
- $1,743
- Practice address
- 7500 San Felipe St, Houston, TX 77063
- Practice phone
- Call (713) 953-9932
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Opst - the Surgery Center, LLC
Houston, Texas
Find Dr. Longo's professional email, personal email and mobile number
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Dr. Marc Narciso Longo is an ophthalmologist in Houston, Texas
Dr. Longo practices at Opst - the Surgery Center, LLC in Houston, Texas.
Dr. Longo's NPI, 1679559009, was assigned on December 18, 2005. Dr. Longo graduated from McGovern Medical School in 1990. Dr. Longo's Texas license number on file is J0077.
- NPI
- 1679559009NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264524396
- NPI enumeration date
- December 18, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (713) 953-9932
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marc Narciso Longo practices at Opst - the Surgery Center, LLC in Houston, Texas
Dr. Longo's primary practice is Opst - the Surgery Center, LLC, at 7500 San Felipe St, Houston, TX 77063 in Harris County. The practice phone is (713) 953-9932.
- Opst - the Surgery Center, LLC7500 San Felipe St, Houston, TX 77063 · Harris CountyPhone(713) 953-9932
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Marc Narciso Longo is affiliated with 1 site of care and 1 medical group
Dr. Longo's primary practice is Opst - the Surgery Center, LLC in Houston, Texas. Dmand AI also links Dr. Longo to 1 medical group, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Marc Narciso Longo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Longo practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Opst - the Surgery Center, LLC | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marc Narciso Longo is one of 1,311 ophthalmologists in Texas
Ophthalmology is Dr. Longo's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Longo is board certified in ophthalmology by the American Board of Ophthalmology. Dr. Longo has a license on file in Texas.
Specialties and state licenses
- Ophthalmology, TexasPrimary
Clinical focus
Dmand AI lists conjunctivitis, dry eye and eyelid inflammation among the conditions Dr. Longo treats.
Ophthalmologists near Dr. Longo
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Marc Narciso Longo billed Medicare for 571 services in 2024
CMS data shows 571 Medicare services from Dr. Longo across 9 procedure codes in 2024, for 297 Medicare patients. Medicare paid $58,883 for them. Every service was in an office.
Dr. Longo's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3312024: 3077%
- Tests and treatments
- 2023: 2352024: 18621%
- Surgery
- 2023: 952024: 7818%
Dr. Longo compared with the Texas median for ophthalmologists, 2024
- Dr. Longo
- Texas median
- Medicare services
- 571vs 1,35358% below
- Medicare patients
- 297vs 49240% below
- Part D claims
- 437vs 61329% below
Medians across 1,290 ophthalmologists in Texas with Dmand AI profiles that report each measure.
Dr. Longo's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Marc Narciso Longo treated 297 Medicare patients in 2024, average age 75
CMS counts 297 Medicare patients who saw Dr. Longo in 2024. The largest group is 65 to 74, with 158 patients. 75% of them have high cholesterol, and 69% have high blood pressure. Their average risk score is 0.95, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Longo's median patient age at 66, with 60% women.
Dr. Longo's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Longo's Medicare patients by sex, 2024
- Women17459%
- Men12341%
Chronic conditions among Dr. Longo's Medicare patients, 2024
- High cholesterol75%
- High blood pressure69%
- Arthritis42%
- Ischemic heart disease29%
- Anxiety19%
- Cancer19%
- Osteoporosis19%
- Diabetes16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Longo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women60%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marc Narciso Longo wrote 481 Medicare Part D claims in 2024
In 2024, Dr. Longo wrote 481 Medicare Part D claims for 182 patients. 69% of them were for generic drugs. CMS names the drug for 437 of them, across 8 drugs with 11 or more claims each, at $9,845 in total drug cost. In 2023, CMS named 423 claims across 6 drugs.
Dr. Longo's Part D claims by kind of drug, 2024
- Generic334 claims69%
- Brand-name147 claims31%
Dr. Longo's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Longo's Part D claims, 2024
- Antibiotics29%139 of 481 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4232024: 4373%
Drugs named by CMS: 8 in 2024, 6 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Marc Narciso Longo scored 97 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 97 out of 100 for Dr. Longo for performance year 2024, reported as part of a group. Dr. Longo accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Longo's MIPS scores, performance year 2024
- 97of 100Final score
- 94.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Marc Narciso Longo received $1,743 in industry payments from 2016 to 2025
CMS Open Payments shows 71 general payments to Dr. Longo from 15 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Horizon Pharma plc paid the most, $513.
General payments to Dr. Longo by program year, 2016 to 2025
General payments to Dr. Longo by kind, 2016 to 2025
- Food and beverage$1,70598%
- Education$382%
Companies that paid Dr. Longo the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Marc Narciso Longo has 4 awards and honors on record
Dmand AI lists 4 awards for Dr. Longo, most recently Super Doc in 2013.
Awards and honors for Dr. Longo
- 2013
- Super Doc
- Undated
- AAO Fellow
- ACS Fellow
- CMS Stage 1 EHR
Source: Dmand AI Professional Profile Data
Dr. Marc Narciso Longo graduated from McGovern Medical School
Dr. Longo graduated from McGovern Medical School in 1990. Dr. Longo is a member of AAO and ACS.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Marc Narciso Longo accepts plans from 4 insurance carriers
Dr. Longo is in network with 4 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- CMS Medicare
Plan types Dr. Longo accepts, by number of carriers
- Medicare3
- PPO3
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Marc Narciso Longo's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Marc Narciso Longo
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Marc Narciso Longo's NPI number?
Dr. Marc Narciso Longo's NPI number is 1679559009. It was assigned on December 18, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Marc Narciso Longo?
Dr. Marc Narciso Longo is an ophthalmologist in Houston, Texas. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Marc Narciso Longo practice?
Dr. Longo practices at 7500 San Felipe St, Houston, TX 77063. Dr. Longo's primary practice is Opst - the Surgery Center, LLC in Houston, Texas. Dmand AI also links Dr. Longo to 1 medical group.
What is Dr. Marc Narciso Longo's office phone number?
The practice phone on file for Dr. Longo is (713) 953-9932.
What is Dr. Marc Narciso Longo's medical license number?
Dr. Longo's Texas license number on file is J0077.
Does Dr. Marc Narciso Longo accept Medicare?
Yes. CMS data shows Dr. Longo billed Medicare for 571 services in 2024, and Dr. Longo accepts Medicare assignment.
What is Dr. Marc Narciso Longo's MIPS score?
Dr. Longo's MIPS final score for performance year 2024 is 97 out of 100, reported as part of a group.
How many Medicare patients does Dr. Marc Narciso Longo see?
CMS counts 297 Medicare patients who saw Dr. Longo in 2024, with an average age of 75.
Is Dr. Marc Narciso Longo board certified?
Yes. Dr. Longo is board certified in ophthalmology by the American Board of Ophthalmology.
What services does Dr. Marc Narciso Longo bill to Medicare?
In 2024, Dr. Longo's most billed Medicare services were office visit, new patient (99203), eye exam or test (92081) and eye exam or test (92285).
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Where did Dr. Marc Narciso Longo go to medical school?
Dr. Longo graduated from McGovern Medical School in 1990.
What drugs does Dr. Marc Narciso Longo prescribe most?
In 2024 Medicare Part D data, Dr. Longo's most prescribed drugs by claims were Neomycin-Polymyxin-Dexameth, Tobramycin-Dexamethasone and Cephalexin.
Has Dr. Marc Narciso Longo received payments from drug or device companies?
CMS Open Payments shows $1,743 in general payments to Dr. Longo from 15 companies from 2016 to 2025. The largest total came from Horizon Pharma plc.
How long has Dr. Marc Narciso Longo been practicing?
Dr. Longo graduated from medical school in 1990, 36 years ago.
What insurance does Dr. Marc Narciso Longo accept?
Dr. Longo is in network with 4 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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