Dr. Gareth M. C. Lema, MD, PhD
- Medicare services, 2024
- 447
- Medicare patients, 2024
- 120
- Part D claims, 2024
- 378
- Hospital affiliations
- 2
- Industry payments
- $1,204
- Practice address
- One Gustave L Levy Place, New York, NY 10029
- Practice phone
- Call (212) 241-7981
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lema's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gareth M. C. Lema is a retina specialist (ophthalmology) physician in New York, New York
Dr. Lema practices at The Mount Sinai Hospital in New York, New York, part of Mount Sinai Health System.
Dr. Lema's NPI, 1982802476, was assigned on July 5, 2007. Dr. Lema graduated from State University of New York at Buffalo School of Medicine in 2007. Dr. Lema holds New York license 260449.
- NPI
- 1982802476NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2264600543
- NPI enumeration date
- July 5, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (212) 241-7981
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gareth M. C. Lema practices at 2 locations in New York, New York
Dr. Lema's primary practice is The Mount Sinai Hospital, at One Gustave L Levy Place, New York, NY 10029 in New York County. The practice phone is (212) 241-7981. Dr. Lema also practices at The Mount Sinai Hospital, 1 Gustave L Levy Pl, New York, NY 10029.
- The Mount Sinai HospitalPrimaryOne Gustave L Levy Place, New York, NY 10029 · New York CountyPhone(212) 241-7981
- The Mount Sinai Hospital1 Gustave L Levy Pl, New York, NY 10029 · New York CountyPhone(212) 241-7175
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Gareth M. C. Lema is affiliated with 3 sites of care and 1 medical group
Dr. Lema's primary practice is The Mount Sinai Hospital in New York, New York, part of Mount Sinai Health System. Dr. Lema is also affiliated with New York Eye and Ear Infirmary of Mount Sinai. The medical group on file is Mount Sinai Institute for Liver Medicine. Dmand AI also links Dr. Lema to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gareth M. C. Lema's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lema practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| The Mount Sinai Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Mount Sinai Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Gareth M. C. Lema is one of 96 retina specialist (ophthalmology) physicians in New York
Retina specialist is Dr. Lema's primary specialty in the NPI Registry, under taxonomy code 207WX0107X. Dr. Lema is licensed in New York.
Specialties and state licenses
- Retina specialist (ophthalmology), New YorkPrimary
Retina specialist (ophthalmology) physicians near Dr. Lema
Counts of retina specialist (ophthalmology) physicians 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. Gareth M. C. Lema billed Medicare for 447 services in 2024
CMS data shows 447 Medicare services from Dr. Lema across 7 procedure codes in 2024, for 120 Medicare patients. Medicare paid $20,990 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lema's Medicare services by type, 2024
- Tests and treatments220
- Office and hospital visits116
- Surgery92
- Imaging19
Dr. Lema compared with the New York median for retina specialist (ophthalmology) physicians, 2024
- Dr. Lema
- New York median
- Medicare services
- 447vs 6,94494% below
- Medicare patients
- 120vs 54478% below
- Part D claims
- 316vs 52239% below
Medians across 94 retina specialist (ophthalmology) physicians in New York with Dmand AI profiles that report each measure.
Dr. Lema'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lema and other retina specialist (ophthalmology) physicians in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gareth M. C. Lema treated 120 Medicare patients in 2024, average age 72
CMS counts 120 Medicare patients who saw Dr. Lema in 2024. The largest group is 65 to 74, with 55 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 41% are also on Medicaid. Their average risk score is 2.19, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Lema's median patient age at 64, with 51% women.
Dr. Lema's Medicare patients by age, 2024
Dr. Lema's Medicare patients by sex, 2024
- Women6453%
- Men5647%
Chronic conditions among Dr. Lema's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes53%
- Chronic kidney disease41%
- Ischemic heart disease41%
- Arthritis36%
- Mood disorders29%
- Depression28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lema's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women51%
- Men47%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gareth M. C. Lema wrote 378 Medicare Part D claims in 2024
In 2024, Dr. Lema wrote 378 Medicare Part D claims for 64 patients. 62% of them were for generic drugs. CMS names the drug for 316 of them, across 11 drugs with 11 or more claims each, at $26,596 in total drug cost.
Dr. Lema's Part D claims by kind of drug, 2024
- Generic236 claims62%
- Brand-name142 claims38%
Dr. Lema'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.
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
How Dr. Gareth M. C. Lema takes part in Medicare
Dr. Lema accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Gareth M. C. Lema received $1,204 in industry payments from 2024 to 2025
CMS Open Payments shows 19 general payments to Dr. Lema from 10 drug and device companies from 2024 to 2025. Food and beverage make up the largest share, 100% of the total. Bausch & Lomb Americas Inc. paid the most, $219.
General payments to Dr. Lema by program year, 2024 to 2025
Companies that paid Dr. Lema the most, 2024 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gareth M. C. Lema graduated from State University of New York at Buffalo School of Medicine
Dr. Lema graduated from State University of New York at Buffalo School of Medicine in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gareth M. C. Lema'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 Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Gareth M. C. Lema
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. Gareth M. C. Lema's NPI number?
Dr. Gareth M. C. Lema's NPI number is 1982802476. It was assigned on July 5, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gareth M. C. Lema?
Dr. Gareth M. C. Lema is a retina specialist (ophthalmology) physician in New York, New York. The primary specialty in the NPI Registry is Retina Specialist (Ophthalmology) Physician (taxonomy code 207WX0107X).
Where does Dr. Gareth M. C. Lema practice?
Dr. Lema practices at One Gustave L Levy Place, New York, NY 10029. Dr. Lema also practices at 1 Gustave L Levy Pl, New York, NY 10029. Dr. Lema's primary practice is The Mount Sinai Hospital in New York, New York, part of Mount Sinai Health System. Dmand AI also links Dr. Lema to 1 group practice or clinic.
What is Dr. Gareth M. C. Lema's office phone number?
The practice phone on file for Dr. Lema is (212) 241-7981.
What is Dr. Gareth M. C. Lema's medical license number?
Dr. Lema holds New York license 260449.
Which hospitals is Dr. Gareth M. C. Lema affiliated with?
Dr. Lema practices at The Mount Sinai Hospital in New York, New York. Dr. Lema is also affiliated with New York Eye and Ear Infirmary of Mount Sinai.
What medical group is Dr. Gareth M. C. Lema part of?
Dr. Lema is linked to Mount Sinai Institute for Liver Medicine.
Does Dr. Gareth M. C. Lema accept Medicare?
Yes. CMS data shows Dr. Lema billed Medicare for 447 services in 2024, and Dr. Lema accepts Medicare assignment.
How many Medicare patients does Dr. Gareth M. C. Lema see?
CMS counts 120 Medicare patients who saw Dr. Lema in 2024, with an average age of 72.
What services does Dr. Gareth M. C. Lema bill to Medicare?
In 2024, Dr. Lema's most billed Medicare services were eye exam or test (92134), surgery: eye (67028) and office visit, established patient (99214).
Show 4 more questionsShow fewer questions
Where did Dr. Gareth M. C. Lema go to medical school?
Dr. Lema graduated from State University of New York at Buffalo School of Medicine in 2007.
What drugs does Dr. Gareth M. C. Lema prescribe most?
In 2024 Medicare Part D data, Dr. Lema's most prescribed drugs by claims were Latanoprost, Brimonidine Tartrate and Prednisolone Acetate.
Has Dr. Gareth M. C. Lema received payments from drug or device companies?
CMS Open Payments shows $1,204 in general payments to Dr. Lema from 10 companies from 2024 to 2025. The largest total came from Bausch & Lomb Americas Inc.
How long has Dr. Gareth M. C. Lema been practicing?
Dr. Lema graduated from medical school in 2007, 19 years ago.
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