Grethel John, APN
- MIPS score, 2024
- 99
- Hospital affiliations
- 1
- Medical group
- 1
- State license
- 1
- Year NPI issued
- 2021
- Practice address
- 94 Old Short Hills Road, Livingston, NJ 07039
- Practice phone
- Call (973) 322-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Grethel John'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.
Grethel John is a nurse practitioner in Livingston, New Jersey
Grethel John practices at Cooperman Barnabas Medical Center in Livingston, New Jersey, part of RWJBarnabas Health.
Grethel John's NPI, 1770241663, was assigned on December 7, 2021. Grethel John holds New Jersey license 26NJ01236200.
- NPI
- 1770241663NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658757323
- NPI enumeration date
- December 7, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (973) 322-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 31
- Medical school graduation
- 2021
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Grethel John practices at Cooperman Barnabas Medical Center in Livingston, New Jersey
Grethel John's primary practice is Cooperman Barnabas Medical Center, at 94 Old Short Hills Road, Livingston, NJ 07039 in Essex County. The practice phone is (973) 322-5000.
- Cooperman Barnabas Medical Center94 Old Short Hills Road, Livingston, NJ 07039 · Essex CountyPhone(973) 322-5000
Source: Dmand AI Affiliation Data
Grethel John is affiliated with 1 site of care and 1 medical group
Grethel John's primary practice is Cooperman Barnabas Medical Center in Livingston, New Jersey, part of RWJBarnabas Health. The medical group on file is RWJBarnabas Health Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Grethel John's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Grethel John practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cooperman Barnabas Medical Center | 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 RWJBarnabas Health and 6.2K+ hospitals, with verified contacts in the same login.
Grethel John is one of 1,544 nurse practitioners in New Jersey
Nurse practitioner is Grethel John's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Grethel John is licensed in New Jersey.
Specialties and state licenses
- Nurse practitioner, New JerseyPrimary
Nurse practitioners near Grethel John
Counts of nurse practitioners 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
Grethel John's patients have a median age of 81
Across all payers, Dmand AI patient panel data puts Grethel John's median patient age at 81, with 50% women.
Grethel John's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 81
Patient panel by sex, all payers
- Women50%
- Men43%
Source: Dmand AI Patient Panel Data
Grethel John scored 99 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 99 out of 100 for Grethel John for performance year 2024, reported through an alternative payment model (APM). Grethel John accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Grethel John's MIPS scores, performance year 2024
- 99of 100Final score
- 84.3of 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
Sources for Grethel John'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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 Grethel John
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Grethel John's NPI number?
Grethel John's NPI number is 1770241663. It was assigned on December 7, 2021, and it is active in the NPI Registry.
What does Grethel John specialize in?
Grethel John is a nurse practitioner in Livingston, New Jersey. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Grethel John practice?
Grethel John practices at 94 Old Short Hills Road, Livingston, NJ 07039. Grethel John's primary practice is Cooperman Barnabas Medical Center in Livingston, New Jersey, part of RWJBarnabas Health.
What is Grethel John's office phone number?
The practice phone on file for Grethel John is (973) 322-5000.
What is Grethel John's medical license number?
Grethel John holds New Jersey license 26NJ01236200.
Which hospitals is Grethel John affiliated with?
Grethel John practices at Cooperman Barnabas Medical Center in Livingston, New Jersey.
What medical group is Grethel John part of?
Grethel John is linked to RWJBarnabas Health Medical Group.
Does Grethel John accept Medicare?
Yes. CMS lists Grethel John as accepting Medicare assignment.
What is Grethel John's MIPS score?
Grethel John's MIPS final score for performance year 2024 is 99 out of 100, reported through an alternative payment model (APM).
How long has Grethel John been practicing?
Grethel John graduated from medical school in 2021, 5 years ago.
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