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Dr. Peter R. Chai, MD
NPI1316267305PAC ID8527284173
- Medicare services, 2024
- 204
- Medicare patients, 2024
- 219
- Part D claims, 2024
- 34
- Publications
- 150
- Clinical trials
- 1
- Practice address
- 75 Francis Street, Boston, MA 02115
- Practice phone
- Call (617) 732-5500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chai'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. Peter R. Chai is an emergency medicine physician in Boston, Massachusetts
Dr. Chai practices at Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Chai's NPI, 1316267305, was assigned on June 2, 2010. Dr. Chai holds Massachusetts license 257990.
NPI and contact details
- NPI
- 1316267305NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8527284173
- NPI enumeration date
- June 2, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 732-5500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter R. Chai practices at Brigham and Women's Hospital in Boston, Massachusetts
Dr. Chai's primary practice is Brigham and Women's Hospital, at 75 Francis Street, Boston, MA 02115 in Suffolk County. The practice phone is (617) 732-5500.
- Brigham and Women's Hospital75 Francis Street, Boston, MA 02115 · Suffolk CountyPhone(617) 732-5500
Source: Dmand AI Affiliation Data
Dr. Peter R. Chai is affiliated with 5 sites of care and 1 medical group
Dr. Chai's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Chai is also affiliated with Dana-Farber Cancer Institute. The medical group on file is Brigham and Women's Hospital. Dmand AI also links Dr. Chai to 2 more hospitals and 1 hospital outpatient department, each named with a free account.
Dana-Farber Cancer InstituteBrigham and Women's Hospital2 hospitalsNames with a free account1 hospital outpatient departmentName with a free account
See all 6 affiliations for Dr. ChaiSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Peter R. Chai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chai practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Brigham and Women's Hospital | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Peter R. Chai is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Chai's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Chai's licenses on file in 2 states: Massachusetts and Rhode Island.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
- Rhode Island license
Emergency medicine physicians near Dr. Chai
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
1,483emergency medicine physicians in Massachusetts330emergency medicine physicians in Boston68emergency medicine physicians at Brigham and Women's Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Peter R. Chai billed Medicare for 204 services in 2024
CMS data shows 204 Medicare services from Dr. Chai across 4 procedure codes in 2024, for 219 Medicare patients. Medicare paid $24,784 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024204
Medicare patients219
Paid by Medicare$24,784
Procedure codes4
Dr. Chai's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1392024: 20447%
Dr. Chai compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Chai
- Massachusetts median
- Medicare services
- 204vs 34140% below
- Medicare patients
- 219vs 33735% below
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Chai'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.
Need commercial claims for Dr. Chai?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chai and other emergency medicine physicians in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Peter R. Chai treated 219 Medicare patients in 2024, average age 73
CMS counts 219 Medicare patients who saw Dr. Chai in 2024. The largest group is 75 to 84, with 70 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 41% are also on Medicaid. Their average risk score is 2.22, 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. Chai's median patient age at 57, with 58% women.
Medicare patients, 2024219
Average age73
Average risk score2.22
Also on Medicaid41%
Dr. Chai's Medicare patients by age, 2024
Dr. Chai's Medicare patients by sex, 2024
- Women13562%
- Men8438%
Chronic conditions among Dr. Chai's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Arthritis52%
- Anxiety48%
- Mood disorders48%
- Depression40%
- Diabetes39%
- Chronic kidney disease37%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Peter R. Chai wrote 34 Medicare Part D claims in 2024
In 2024, Dr. Chai wrote 34 Medicare Part D claims for 26 patients. 88% of them were for generic drugs.
Part D claims, 202434
Part D patients26
Dr. Chai's Part D claims by kind of drug, 2024
- Generic30 claims88%
- Brand-name and other4 claims12%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Peter R. Chai takes part in Medicare
Dr. Chai accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Peter R. Chai has 150 publications on record
Dmand AI links 150 papers to Dr. Chai, published from 2016 to 2025. 2022 was the busiest year, with 25. The most frequent topics are Emergency Service, Hospital, HIV Infections and Analgesics, Opioid. Dr. Chai has published most often in J Med Toxicol. Dr. Chai's most frequent co-authors are Edward W. Boyer, MD, Timothy B. Erickson, MD and Stephanie P. Carreiro, MD.
Papers150
Years published2016 to 2025
Dr. Chai's papers by year, 2016 to 2025
Topics Dr. Chai writes about most
- Emergency Service, Hospital
- HIV Infections
- Analgesics, Opioid
- COVID-19
- Pandemics
- Medication Adherence
- Anti-HIV Agents
- SARS-CoV-2
Dr. Chai's most frequent co-authors
- Edward W. Boyer, MD56 shared papers
- Timothy B. Erickson, MD34 shared papers
- Stephanie P. Carreiro, MD14 shared papers
Recent publications by Dr. Chai
See who Dr. Chai researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chai works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Peter R. Chai has worked on 1 clinical trial
Dmand AI links Dr. Chai to 1 clinical trial. 1 is still active or recruiting. Conditions studied include Anxiety Disorders and Mental Disorders.
Conditions in Dr. Chai's trials
- Anxiety Disorders
- Mental Disorders
Investigators on the most trials with Dr. Chai
Recent clinical trials with Dr. Chai
Randomized, Double-blind Phase II Study of a Single Dose of Cannabidiol (CBD) for Acute Anticipatory Anxiety in Advanced Breast Cancer (opens in a new tab)
Active, not recruitingPhase 2
Anxiety DisordersMental DisordersCannabidiol
Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Peter R. Chai received $4,369 in industry payments from 2019 to 2024
CMS Open Payments shows 2 general payments to Dr. Chai from 2 drug and device companies from 2019 to 2024. Speaker and faculty fees make up the largest share, 99% of the total. Pfizer Inc. paid the most, $4,325.
General payments to Dr. Chai by program year, 2019 to 2024
General payments to Dr. Chai by kind, 2019 to 2024
$4.4Kin total
- Speaker and faculty fees$4,32599%
- Food and beverage$441%
Companies that paid Dr. Chai the most, 2019 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Peter R. Chai'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 (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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (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. Peter R. Chai
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. Peter R. Chai's NPI number?
Dr. Peter R. Chai's NPI number is 1316267305. It was assigned on June 2, 2010, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter R. Chai?
Dr. Peter R. Chai is an emergency medicine physician in Boston, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Peter R. Chai practice?
Dr. Chai practices at 75 Francis Street, Boston, MA 02115. Dr. Chai's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Chai to 2 hospitals and 1 hospital outpatient department.
What is Dr. Peter R. Chai's office phone number?
The practice phone on file for Dr. Chai is (617) 732-5500.
What is Dr. Peter R. Chai's medical license number?
Dr. Chai holds Massachusetts license 257990, one of the licenses on file in 2 states.
Which states has Dr. Peter R. Chai been licensed in?
Dmand AI has state licenses on file for Dr. Chai in Massachusetts and Rhode Island.
Which hospitals is Dr. Peter R. Chai affiliated with?
Dr. Chai practices at Brigham and Women's Hospital in Boston, Massachusetts. Dr. Chai is also affiliated with Dana-Farber Cancer Institute. Dmand AI links Dr. Chai to 2 more hospitals.
What medical group is Dr. Peter R. Chai part of?
Dr. Chai is linked to Brigham and Women's Hospital.
Does Dr. Peter R. Chai accept Medicare?
Yes. CMS data shows Dr. Chai billed Medicare for 204 services in 2024, and Dr. Chai accepts Medicare assignment.
How many Medicare patients does Dr. Peter R. Chai see?
CMS counts 219 Medicare patients who saw Dr. Chai in 2024, with an average age of 73.
Show 5 more questionsShow fewer questions
What services does Dr. Peter R. Chai bill to Medicare?
In 2024, Dr. Chai's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and hospital inpatient care (99223).
Has Dr. Peter R. Chai received payments from drug or device companies?
CMS Open Payments shows $4,369 in general payments to Dr. Chai from 2 companies from 2019 to 2024. The largest total came from Pfizer Inc.
How long has Dr. Peter R. Chai been practicing?
Dr. Chai graduated from medical school in 2010, 16 years ago.
Does Dr. Peter R. Chai do research?
Dmand AI links 150 publications to Dr. Chai, published from 2016 to 2025. Dr. Chai has worked on 1 clinical trial.
Who does Dr. Peter R. Chai publish with?
Dr. Chai's most frequent co-authors are Edward W. Boyer, MD (56 shared papers), Timothy B. Erickson, MD (34 shared papers) and Stephanie P. Carreiro, MD (14 shared papers).
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