Am J Psychiatry
Adaptation, PhysiologicalEuthyroid Sick SyndromesMental Disorders
Dr. John Warren Barnhill, MD
NPI1699813600PAC ID4183792799
- Medicare services, 2016
- 54
- Part D claims, 2024
- 61
- Publications
- 1
- MIPS score, 2024
- 100
- Hospital affiliations
- 1
- Practice address
- 525 East 68th Street, New York, NY 10065
- Practice phone
- Call (212) 746-5454
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Barnhill'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. John Warren Barnhill is a psychiatrist in New York, New York
Dr. Barnhill practices at NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York, part of NewYork-Presbyterian Hospital.
Dr. Barnhill's NPI, 1699813600, was assigned on February 2, 2007. Dr. Barnhill graduated from Baylor College Of Medicine in 1985. Dr. Barnhill holds New York license 170116.
NPI and contact details
- NPI
- 1699813600NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4183792799
- NPI enumeration date
- February 2, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (212) 746-5454
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Warren Barnhill practices at NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York
Dr. Barnhill's primary practice is NewYork-Presbyterian/Weill Cornell Medical Center, at 525 East 68th Street, New York, NY 10065 in New York County. The practice phone is (212) 746-5454.
- NewYork-Presbyterian/Weill Cornell Medical Center525 East 68th Street, New York, NY 10065 · New York CountyPhone(212) 746-5454
Source: Dmand AI Affiliation Data
Dr. John Warren Barnhill is affiliated with 3 sites of care and 1 medical group
Dr. Barnhill's primary practice is NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York, part of NewYork-Presbyterian Hospital. The medical group on file is Weill Cornell Physicians. Dmand AI also links Dr. Barnhill to 2 more clinical labs, 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. John Warren Barnhill's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Barnhill practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| NewYork-Presbyterian/Weill Cornell Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. John Warren Barnhill is one of 4,448 psychiatrists in New York
Psychiatry is Dr. Barnhill's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Barnhill is licensed in New York.
Specialties and state licenses
- Psychiatry, New YorkPrimary
Psychiatrists near Dr. Barnhill
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
4,448psychiatrists in New York1,638psychiatrists in New York104psychiatrists at NewYork-Presbyterian/Weill Cornell Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. John Warren Barnhill billed Medicare for 54 services in 2016
CMS data shows 54 Medicare services from Dr. Barnhill across 2 procedure codes in 2016. Medicare paid $6,972 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 201654
Paid by Medicare$6,972
Procedure codes2
Dr. Barnhill compared with the New York median for psychiatrists, 2016
- Dr. Barnhill
- New York median
- Medicare services
- 54vs 14262% below
- Part D claims
- 14vs 12489% below
Medians across 5,024 psychiatrists in New York with Dmand AI profiles that report each measure.
Dr. Barnhill's most billed Medicare procedure codes, 2016
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. Barnhill and other psychiatrists in New York.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Warren Barnhill's patients have a median age of 42
Across all payers, Dmand AI patient panel data puts Dr. Barnhill's median patient age at 42, with 50% women.
Dr. Barnhill's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 42
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. John Warren Barnhill wrote 61 Medicare Part D claims in 2024
In 2024, Dr. Barnhill wrote 61 Medicare Part D claims. 100% of them were for generic drugs. CMS names the drug for 14 of them, across 1 drug with 11 or more claims each, at $195 in total drug cost. In 2022, CMS named 34 claims across 3 drugs.
Part D claims, 202461
Drugs named by CMS1
Total drug cost$195
Dr. Barnhill's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 342023: 1459%
Drugs named by CMS: 1 in 2023, 3 in 2022.
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. John Warren Barnhill scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Barnhill for performance year 2024, reported through an alternative payment model (APM). Dr. Barnhill accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Barnhill as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Barnhill's MIPS scores, performance year 2024
- 100of 100Final score
- 85.3of 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
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Dr. John Warren Barnhill has 1 publication on record
Dmand AI links 1 paper to Dr. Barnhill.
Papers1
Recent publications by Dr. Barnhill
See who Dr. Barnhill researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Barnhill works with, so you can find a warm path to the right psychiatrists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John Warren Barnhill received $3,945 in industry payments from 2018 to 2025
CMS Open Payments shows 7 general payments to Dr. Barnhill from 1 drug or device company from 2018 to 2025. Consulting fees make up the largest share, 100% of the total. Merck Sharp & Dohme Corporation paid the most, $3,945.
General payments to Dr. Barnhill by program year, 2018 to 2025
Companies that paid Dr. Barnhill the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Warren Barnhill graduated from Baylor College Of Medicine
Dr. Barnhill graduated from Baylor College Of Medicine in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Warren Barnhill'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 Data |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. John Warren Barnhill
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. John Warren Barnhill's NPI number?
Dr. John Warren Barnhill's NPI number is 1699813600. It was assigned on February 2, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. John Warren Barnhill?
Dr. John Warren Barnhill is a psychiatrist in New York, New York. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. John Warren Barnhill practice?
Dr. Barnhill practices at 525 East 68th Street, New York, NY 10065. Dr. Barnhill's primary practice is NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York, part of NewYork-Presbyterian Hospital. Dmand AI also links Dr. Barnhill to 2 clinical labs.
What is Dr. John Warren Barnhill's office phone number?
The practice phone on file for Dr. Barnhill is (212) 746-5454.
What is Dr. John Warren Barnhill's medical license number?
Dr. Barnhill holds New York license 170116.
Which hospitals is Dr. John Warren Barnhill affiliated with?
Dr. Barnhill practices at NewYork-Presbyterian/Weill Cornell Medical Center in New York, New York.
What medical group is Dr. John Warren Barnhill part of?
Dr. Barnhill is linked to Weill Cornell Physicians.
Does Dr. John Warren Barnhill accept Medicare?
Yes. CMS data shows Dr. Barnhill billed Medicare for 54 services in 2016, and Dr. Barnhill accepts Medicare assignment.
Does Dr. John Warren Barnhill offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Barnhill as offering telehealth services.
What is Dr. John Warren Barnhill's MIPS score?
Dr. Barnhill's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
Show 6 more questionsShow fewer questions
What services does Dr. John Warren Barnhill bill to Medicare?
In 2016, Dr. Barnhill's most billed Medicare services were hospital inpatient care (99222) and hospital inpatient care (99223).
Where did Dr. John Warren Barnhill go to medical school?
Dr. Barnhill graduated from Baylor College Of Medicine in 1985.
What drugs does Dr. John Warren Barnhill prescribe most?
In 2023 Medicare Part D data, Dr. Barnhill's most prescribed drugs by claims were Lamotrigine.
Has Dr. John Warren Barnhill received payments from drug or device companies?
CMS Open Payments shows $3,945 in general payments to Dr. Barnhill from 1 company from 2018 to 2025. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. John Warren Barnhill been practicing?
Dr. Barnhill graduated from medical school in 1985, 41 years ago.
Does Dr. John Warren Barnhill do research?
Dmand AI links 1 publication to Dr. Barnhill.
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