Johan Guillaume
- Medicare services, 2024
- 589
- Medicare patients, 2024
- 216
- Part D claims, 2024
- 19
- MIPS score, 2024
- 91
- Hospital affiliations
- 1
- Practice address
- 150 55th St, Brooklyn, NY 11220
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nyu Langone Hospital-Brooklyn-Cardiac Catheterization Lab - HOPD
Acute Care Hospital outpatient department · Brooklyn, New York
Find Johan Guillaume's professional email, personal email and mobile number
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Johan Guillaume is a hospitalist in Brooklyn, New York
Johan Guillaume practices at Nyu Langone Hospital-Brooklyn-Cardiac Catheterization Lab - HOPD in Brooklyn, New York.
Johan Guillaume's NPI, 1457738593, was assigned on April 28, 2015. Johan Guillaume holds New York license 315641.
- NPI
- 1457738593NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7911245485
- NPI enumeration date
- April 28, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Johan Guillaume practices at Nyu Langone Hospital-Brooklyn-Cardiac Catheterization Lab - HOPD in Brooklyn, New York
Johan Guillaume's primary practice is Nyu Langone Hospital-Brooklyn-Cardiac Catheterization Lab - HOPD, at 150 55th St, Brooklyn, NY 11220.
- Nyu Langone Hospital-Brooklyn-Cardiac Catheterization Lab - HOPD150 55th St, Brooklyn, NY 11220
Source: Dmand AI Affiliation Data
Johan Guillaume is affiliated with 3 sites of care and 1 medical group
Johan Guillaume's primary practice is Nyu Langone Hospital-Brooklyn-Cardiac Catheterization Lab - HOPD in Brooklyn, New York. Johan Guillaume is also affiliated with Tisch Hospital. The medical group on file is NYU Langone Orthopedic Surgery Associates. Dmand AI also links Johan Guillaume to 1 more group practice or clinic, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Johan Guillaume's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Johan Guillaume practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nyu Langone Hospital-Brooklyn-Cardiac Catheterization Lab - HOPD | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Johan Guillaume is one of 1,796 hospitalists in New York
Hospitalist is Johan Guillaume's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Johan Guillaume is licensed in New York.
Specialties and state licenses
- Hospitalist, New YorkPrimary
Hospitalists near Johan Guillaume
Counts of hospitalists 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
Johan Guillaume billed Medicare for 589 services in 2024
CMS data shows 589 Medicare services from Johan Guillaume across 5 procedure codes in 2024, for 216 Medicare patients. Medicare paid $49,606 for them. Every service was in a facility, such as a hospital, rather than an office.
Johan Guillaume's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4432024: 58933%
Johan Guillaume compared with the New York median for hospitalists, 2024
- Johan Guillaume
- New York median
- Medicare services
- 589vs 38852% above
- Medicare patients
- 216vs 16333% above
Medians across 1,696 hospitalists in New York with Dmand AI profiles that report each measure.
Johan Guillaume'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
Johan Guillaume treated 216 Medicare patients in 2024, average age 77
CMS counts 216 Medicare patients who saw Johan Guillaume in 2024. The largest group is 75 to 84, with 69 patients. 75% of them have arthritis, and 75% have high blood pressure. 58% are also on Medicaid. Their average risk score is 3.30, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Johan Guillaume's median patient age at 71, with 44% women.
Johan Guillaume's Medicare patients by age, 2024
Johan Guillaume's Medicare patients by sex, 2024
- Women10046%
- Men11654%
Chronic conditions among Johan Guillaume's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Diabetes70%
- Chronic kidney disease63%
- Ischemic heart disease63%
- Heart failure56%
- Atrial fibrillation46%
Share of Medicare patients with each condition. A patient can have several.
Johan Guillaume's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women44%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Johan Guillaume wrote 19 Medicare Part D claims in 2024
In 2024, Johan Guillaume wrote 19 Medicare Part D claims for 11 patients. 79% of them were for generic drugs.
Johan Guillaume's Part D claims by kind of drug, 2024
- Generic15 claims79%
- Brand-name and other4 claims21%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Johan Guillaume scored 91 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 91 out of 100 for Johan Guillaume for performance year 2024, reported as part of a group. Johan Guillaume accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Johan Guillaume's MIPS scores, performance year 2024
- 91of 100Final score
- 91.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 75of 100Cost
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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Sources for Johan Guillaume'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 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 (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) |
| 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 Johan Guillaume
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What is Johan Guillaume's NPI number?
Johan Guillaume's NPI number is 1457738593. It was assigned on April 28, 2015, and it is active in the NPI Registry.
What does Johan Guillaume specialize in?
Johan Guillaume is a hospitalist in Brooklyn, New York. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Johan Guillaume practice?
Johan Guillaume practices at 150 55th St, Brooklyn, NY 11220. Johan Guillaume's primary practice is Nyu Langone Hospital-Brooklyn-Cardiac Catheterization Lab - HOPD in Brooklyn, New York. Dmand AI also links Johan Guillaume to 1 group practice or clinic.
What is Johan Guillaume's medical license number?
Johan Guillaume holds New York license 315641.
Which hospitals is Johan Guillaume affiliated with?
Johan Guillaume is affiliated with Tisch Hospital.
What medical group is Johan Guillaume part of?
Johan Guillaume is linked to NYU Langone Orthopedic Surgery Associates.
Does Johan Guillaume accept Medicare?
Yes. CMS data shows Johan Guillaume billed Medicare for 589 services in 2024, and Johan Guillaume accepts Medicare assignment.
What is Johan Guillaume's MIPS score?
Johan Guillaume's MIPS final score for performance year 2024 is 91 out of 100, reported as part of a group.
How many Medicare patients does Johan Guillaume see?
CMS counts 216 Medicare patients who saw Johan Guillaume in 2024, with an average age of 77.
What services does Johan Guillaume bill to Medicare?
In 2024, Johan Guillaume's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99222).
How long has Johan Guillaume been practicing?
Johan Guillaume graduated from medical school in 2015, 11 years ago.
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