Dr. Gregory S. Fernandez, MD
- Medicare services, 2024
- 360
- Medicare patients, 2024
- 172
- Part D claims, 2024
- 987
- Hospital affiliations
- 1
- Industry payments
- $97
- Practice address
- 1275 York Avenue, New York, NY 10065
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Fernandez's professional email, personal email and mobile number
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Dr. Gregory S. Fernandez is a psychiatrist in New York, New York
Dr. Fernandez practices at Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center.
Dr. Fernandez's NPI, 1194927863, was assigned on June 4, 2007. Dr. Fernandez holds New Jersey license 25MA09538300.
- NPI
- 1194927863NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2466544853
- NPI enumeration date
- June 4, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory S. Fernandez practices at Memorial Sloan Kettering Cancer Center in New York, New York
Dr. Fernandez's primary practice is Memorial Sloan Kettering Cancer Center, at 1275 York Avenue, New York, NY 10065.
- Memorial Sloan Kettering Cancer Center1275 York Avenue, New York, NY 10065
Source: Dmand AI Affiliation Data
Dr. Gregory S. Fernandez is affiliated with 2 sites of care and 7 medical groups
Dr. Fernandez's primary practice is Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center. The medical group on file is Memorial Sloan Kettering Monmouth. Dmand AI also links Dr. Fernandez to 6 more medical groups and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gregory S. Fernandez's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fernandez practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorial Sloan Kettering Cancer Center | Available with a free account |
| +1 more site and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory S. Fernandez is one of 4,448 psychiatrists in New York
Psychiatry is Dr. Fernandez's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dmand AI has Dr. Fernandez's licenses on file in 3 states: New Jersey, California and New York.
Specialties and state licenses
- Psychiatry, New JerseyPrimary
- California license
- New York license
Psychiatrists near Dr. Fernandez
Counts of psychiatrists 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. Gregory S. Fernandez billed Medicare for 360 services in 2024
CMS data shows 360 Medicare services from Dr. Fernandez across 3 procedure codes in 2024, for 172 Medicare patients. Medicare paid $28,316 for them. Every service was in an office.
Dr. Fernandez's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3342024: 29412%
- Tests and treatments
- 2023: 822024: 6620%
Dr. Fernandez compared with the New York median for psychiatrists, 2024
- Dr. Fernandez
- New York median
- Medicare services
- 360vs 1422.5 times
- Medicare patients
- 172vs 414.2 times
- Part D claims
- 947vs 1247.6 times
Medians across 5,024 psychiatrists in New York with Dmand AI profiles that report each measure.
Dr. Fernandez'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. Gregory S. Fernandez treated 172 Medicare patients in 2024, average age 72
CMS counts 172 Medicare patients who saw Dr. Fernandez in 2024. The largest group is 65 to 74, with 80 patients. 75% of them have anxiety, and 75% have high blood pressure. 7% are also on Medicaid. Their average risk score is 3.05, 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. Fernandez's median patient age at 64, with 61% women.
Dr. Fernandez's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Fernandez's Medicare patients by sex, 2024
- Women10058%
- Men7242%
Chronic conditions among Dr. Fernandez's Medicare patients, 2024
- Anxiety75%
- High blood pressure75%
- High cholesterol75%
- Mood disorders75%
- Cancer65%
- Depression63%
- Arthritis51%
- Diabetes30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Fernandez'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
- Women61%
- Men34%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory S. Fernandez wrote 987 Medicare Part D claims in 2024
In 2024, Dr. Fernandez wrote 987 Medicare Part D claims for 205 patients. 100% of them were for generic drugs. CMS names the drug for 947 of them, across 20 drugs with 11 or more claims each, at $20,775 in total drug cost. In 2023, CMS named 884 claims across 17 drugs.
Dr. Fernandez's Part D claims by kind of drug, 2024
- Generic985 claims100%
- Brand-name and other2 claims0%
Dr. Fernandez'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. Fernandez's Part D claims, 2024
- Antipsychotics, patients 65 and over12%120 of 987 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: 8842024: 9477%
Drugs named by CMS: 20 in 2024, 17 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. Gregory S. Fernandez offers telehealth to Medicare patients
Dr. Fernandez accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Fernandez as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gregory S. Fernandez received $97 in industry payments from 2016 to 2023
CMS Open Payments shows 2 general payments to Dr. Fernandez from 2 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Boston Scientific Corporation paid the most, $78.
General payments to Dr. Fernandez by program year, 2016 to 2023
Companies that paid Dr. Fernandez the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gregory S. Fernandez'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 | Dmand AI Affiliation 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Gregory S. Fernandez
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. Gregory S. Fernandez's NPI number?
Dr. Gregory S. Fernandez's NPI number is 1194927863. It was assigned on June 4, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory S. Fernandez?
Dr. Gregory S. Fernandez is a psychiatrist in New York, New York. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Gregory S. Fernandez practice?
Dr. Fernandez practices at 1275 York Avenue, New York, NY 10065. Dr. Fernandez's primary practice is Memorial Sloan Kettering Cancer Center in New York, New York, part of Memorial Sloan Kettering Cancer Center. Dmand AI also links Dr. Fernandez to 6 medical groups and 1 group practice or clinic.
What is Dr. Gregory S. Fernandez's medical license number?
Dr. Fernandez holds New Jersey license 25MA09538300, one of the licenses on file in 3 states.
Which states has Dr. Gregory S. Fernandez been licensed in?
Dmand AI has state licenses on file for Dr. Fernandez in New Jersey, California and New York.
Which hospitals is Dr. Gregory S. Fernandez affiliated with?
Dr. Fernandez practices at Memorial Sloan Kettering Cancer Center in New York, New York.
What medical group is Dr. Gregory S. Fernandez part of?
Dr. Fernandez is linked to Memorial Sloan Kettering Monmouth. Dmand AI links Dr. Fernandez to 6 more medical groups.
Does Dr. Gregory S. Fernandez accept Medicare?
Yes. CMS data shows Dr. Fernandez billed Medicare for 360 services in 2024, and Dr. Fernandez accepts Medicare assignment.
Does Dr. Gregory S. Fernandez offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Fernandez as offering telehealth services.
How many Medicare patients does Dr. Gregory S. Fernandez see?
CMS counts 172 Medicare patients who saw Dr. Fernandez in 2024, with an average age of 72.
Show 4 more questionsShow fewer questions
What services does Dr. Gregory S. Fernandez bill to Medicare?
In 2024, Dr. Fernandez's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and psychiatric service (90792).
What drugs does Dr. Gregory S. Fernandez prescribe most?
In 2024 Medicare Part D data, Dr. Fernandez's most prescribed drugs by claims were Escitalopram Oxalate, Sertraline HCl and Mirtazapine.
Has Dr. Gregory S. Fernandez received payments from drug or device companies?
CMS Open Payments shows $97 in general payments to Dr. Fernandez from 2 companies from 2016 to 2023. The largest total came from Boston Scientific Corporation.
How long has Dr. Gregory S. Fernandez been practicing?
Dr. Fernandez graduated from medical school in 2003, 23 years ago.
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