Dr. Ethan Adair Chapin, MD
- Medicare services, 2024
- 226
- Medicare patients, 2024
- 240
- Part D claims, 2024
- 87
- Publications
- 1
- Hospital affiliations
- 1
- Practice address
- 30 Locust Street, Northampton, MA 01060
- Practice phone
- Call (413) 582-2151
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cooley Dickinson Hospital - Behavioral Health
Psychiatric Inpatient Facility · Northampton, Massachusetts
Find Dr. Chapin's professional email, personal email and mobile number
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Dr. Ethan Adair Chapin is an emergency medicine physician in Northampton, Massachusetts
Dr. Chapin practices at Cooley Dickinson Hospital - Behavioral Health in Northampton, Massachusetts.
Dr. Chapin's NPI, 1386906055, was assigned on June 8, 2012. Dr. Chapin graduated from Renaissance School of Medicine at Stony Brook University in 2012. Dr. Chapin's Florida license number on file is ME124316.
- NPI
- 1386906055NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244201325
- NPI enumeration date
- June 8, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (413) 582-2151
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ethan Adair Chapin practices at Cooley Dickinson Hospital - Behavioral Health in Northampton, Massachusetts
Dr. Chapin's primary practice is Cooley Dickinson Hospital - Behavioral Health, at 30 Locust Street, Northampton, MA 01060. The practice phone is (413) 582-2151.
- Cooley Dickinson Hospital - Behavioral Health30 Locust Street, Northampton, MA 01060Phone(413) 582-2151
Source: Dmand AI Affiliation Data
Dr. Ethan Adair Chapin is affiliated with 5 sites of care and 2 medical groups
Dr. Chapin's primary practice is Cooley Dickinson Hospital - Behavioral Health in Northampton, Massachusetts. Dr. Chapin is also affiliated with Cooley Dickinson Hospital. The medical group on file is Mass General Brigham Medical Group Western Massachusetts. Dmand AI also links Dr. Chapin to 1 more home health agency, 1 hospice, 1 imaging center and 1 medical group, 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. Ethan Adair Chapin's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chapin practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cooley Dickinson Hospital - Behavioral Health | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ethan Adair Chapin is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Chapin's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Chapin is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Chapin's licenses on file in 4 states: Florida, Massachusetts, Indiana and New York.
Specialties and state licenses
- Emergency medicine, FloridaPrimary
- Massachusetts license
- Indiana license
- New York license
Emergency medicine physicians near Dr. Chapin
Counts of emergency medicine physicians 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. Ethan Adair Chapin billed Medicare for 226 services in 2024
CMS data shows 226 Medicare services from Dr. Chapin across 3 procedure codes in 2024, for 240 Medicare patients. Medicare paid $26,342 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chapin's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4552024: 22650%
Dr. Chapin compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Chapin
- Massachusetts median
- Medicare services
- 226vs 34134% below
- Medicare patients
- 240vs 33729% below
- Part D claims
- 73vs 362.0 times
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Chapin'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Chapin 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. Ethan Adair Chapin treated 240 Medicare patients in 2024, average age 75
CMS counts 240 Medicare patients who saw Dr. Chapin in 2024. The largest group is 65 to 74, with 78 patients. 73% of them have high blood pressure, and 60% have high cholesterol. 33% are also on Medicaid. Their average risk score is 1.76, 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. Chapin's median patient age at 47, with 51% women.
Dr. Chapin's Medicare patients by age, 2024
Dr. Chapin's Medicare patients by sex, 2024
- Women13355%
- Men10745%
Chronic conditions among Dr. Chapin's Medicare patients, 2024
- High blood pressure73%
- High cholesterol60%
- Arthritis47%
- Anxiety46%
- Mood disorders44%
- Depression41%
- Chronic kidney disease33%
- Heart failure28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chapin's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 47
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ethan Adair Chapin wrote 87 Medicare Part D claims in 2024
In 2024, Dr. Chapin wrote 87 Medicare Part D claims for 66 patients. 90% of them were for generic drugs. CMS names the drug for 73 of them, across 4 drugs with 11 or more claims each, at $426 in total drug cost. In 2022, CMS named 42 claims across 2 drugs.
Dr. Chapin's Part D claims by kind of drug, 2024
- Generic78 claims90%
- Brand-name and other9 claims10%
Dr. Chapin'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.
Drug classes CMS tracks in Dr. Chapin's Part D claims, 2024
- Antibiotics28%24 of 87 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 422023: 7374%
Drugs named by CMS: 4 in 2023, 2 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
How Dr. Ethan Adair Chapin takes part in Medicare
Dr. Chapin 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. Ethan Adair Chapin has 1 publication on record
Dmand AI links 1 paper to Dr. Chapin in 2017. Dr. Chapin's most frequent co-authors are Robert David Ellspermann, MD and Mathew Jared Nelson, DO.
Dr. Chapin's most frequent co-authors
Recent publications by Dr. Chapin
See who Dr. Chapin researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Chapin 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. Ethan Adair Chapin received $968 in industry payments from 2018 to 2023
CMS Open Payments shows 8 general payments to Dr. Chapin from 6 drug and device companies from 2018 to 2023. Consulting fees make up the largest share, 88% of the total. Seqirus USA Inc paid the most, $848.
General payments to Dr. Chapin by program year, 2018 to 2023
General payments to Dr. Chapin by kind, 2018 to 2023
- Consulting fees$84888%
- Food and beverage$12012%
Companies that paid Dr. Chapin the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ethan Adair Chapin graduated from Renaissance School of Medicine at Stony Brook University
Dr. Chapin graduated from Renaissance School of Medicine at Stony Brook University in 2012. Dr. Chapin is a member of ACEP.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Ethan Adair Chapin accepts plans from 8 insurance carriers
Dr. Chapin is in network with 8 carriers, including Excellus BlueCross BlueShield, United Healthcare and Blue Cross and Blue Shield of Kansas City. Medicaid plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
- United Healthcare
- Blue Cross and Blue Shield of Kansas City
- CMS Medicare
- GA State Medicaid
- HCSC
- RI State Medicaid
- VT State Medicaid
Plan types Dr. Chapin accepts, by number of carriers
- Medicaid3
- Medicare3
- EPO2
- HMO2
- PPO2
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ethan Adair Chapin'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) |
| 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 |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Ethan Adair Chapin
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. Ethan Adair Chapin's NPI number?
Dr. Ethan Adair Chapin's NPI number is 1386906055. It was assigned on June 8, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Ethan Adair Chapin?
Dr. Ethan Adair Chapin is an emergency medicine physician in Northampton, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Ethan Adair Chapin practice?
Dr. Chapin practices at 30 Locust Street, Northampton, MA 01060. Dr. Chapin's primary practice is Cooley Dickinson Hospital - Behavioral Health in Northampton, Massachusetts. Dmand AI also links Dr. Chapin to 1 home health agency, 1 hospice, 1 imaging center and 1 medical group.
What is Dr. Ethan Adair Chapin's office phone number?
The practice phone on file for Dr. Chapin is (413) 582-2151.
What is Dr. Ethan Adair Chapin's medical license number?
Dr. Chapin's Florida license number on file is ME124316, one of the licenses on file in 4 states.
Which states has Dr. Ethan Adair Chapin been licensed in?
Dmand AI has state licenses on file for Dr. Chapin in Florida (2015 to 2023), Massachusetts (2021 to 2027), Indiana (2015 to 2017) and New York (2013 to 2017).
Which hospitals is Dr. Ethan Adair Chapin affiliated with?
Dr. Chapin is affiliated with Cooley Dickinson Hospital.
What medical group is Dr. Ethan Adair Chapin part of?
Dr. Chapin is linked to Mass General Brigham Medical Group Western Massachusetts. Dmand AI links Dr. Chapin to 1 more medical group.
Does Dr. Ethan Adair Chapin accept Medicare?
Yes. CMS data shows Dr. Chapin billed Medicare for 226 services in 2024, and Dr. Chapin accepts Medicare assignment.
How many Medicare patients does Dr. Ethan Adair Chapin see?
CMS counts 240 Medicare patients who saw Dr. Chapin in 2024, with an average age of 75.
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Is Dr. Ethan Adair Chapin board certified?
Yes. Dr. Chapin is board certified in emergency medicine by the American Board of Emergency Medicine.
What services does Dr. Ethan Adair Chapin bill to Medicare?
In 2024, Dr. Chapin's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and critical care (99291).
Where did Dr. Ethan Adair Chapin go to medical school?
Dr. Chapin graduated from Renaissance School of Medicine at Stony Brook University in 2012.
What drugs does Dr. Ethan Adair Chapin prescribe most?
In 2023 Medicare Part D data, Dr. Chapin's most prescribed drugs by claims were Morphine Sulfate, Methylprednisolone and Cephalexin.
Has Dr. Ethan Adair Chapin received payments from drug or device companies?
CMS Open Payments shows $968 in general payments to Dr. Chapin from 6 companies from 2018 to 2023. The largest total came from Seqirus USA Inc.
How long has Dr. Ethan Adair Chapin been practicing?
Dr. Chapin graduated from medical school in 2012, 14 years ago.
Does Dr. Ethan Adair Chapin do research?
Dmand AI links 1 publication to Dr. Chapin.
Who does Dr. Ethan Adair Chapin publish with?
Dr. Chapin's most frequent co-authors are Robert David Ellspermann, MD (1 shared paper) and Mathew Jared Nelson, DO (1 shared paper).
What insurance does Dr. Ethan Adair Chapin accept?
Dr. Chapin is in network with 8 carriers, including Excellus BlueCross BlueShield, United Healthcare and Blue Cross and Blue Shield of Kansas City. Medicaid plans come from the most carriers, 3. Check the plan with the practice before a visit.
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