Dr. Jacob A. Chapman, MD
- Medicare services, 2024
- 482
- Medicare patients, 2024
- 437
- Part D claims, 2024
- 118
- Hospital affiliations
- 2
- Industry payments
- $55
- Practice address
- 164 High Street, Greenfield, MA 01301
- Practice phone
- Call (413) 773-0211
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chapman'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. Jacob A. Chapman is an emergency medicine physician in Greenfield, Massachusetts
Dr. Chapman practices at Baystate Franklin Medical Center in Greenfield, Massachusetts, part of Baystate Health.
Dr. Chapman's NPI, 1790821338, was assigned on January 30, 2007. Dr. Chapman graduated from University of North Carolina at Chapel Hill School of Medicine in 2004. Dr. Chapman holds Massachusetts license 230709.
- NPI
- 1790821338NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4082785340
- NPI enumeration date
- January 30, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (413) 773-0211
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jacob A. Chapman practices at Baystate Franklin Medical Center in Greenfield, Massachusetts
Dr. Chapman's primary practice is Baystate Franklin Medical Center, at 164 High Street, Greenfield, MA 01301 in Franklin County. The practice phone is (413) 773-0211.
- Baystate Franklin Medical Center164 High Street, Greenfield, MA 01301 · Franklin CountyPhone(413) 773-0211
Source: Dmand AI Affiliation Data
Dr. Jacob A. Chapman is affiliated with 4 sites of care and 1 medical group
Dr. Chapman's primary practice is Baystate Franklin Medical Center in Greenfield, Massachusetts, part of Baystate Health. Dr. Chapman is also affiliated with Cooley Dickinson Hospital. The medical group on file is Baystate Medical Practices. Dmand AI also links Dr. Chapman to 1 more community health center and 1 imaging center, 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. Jacob A. Chapman's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chapman practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Baystate Franklin Medical Center | Available with a free account |
| +3 more affiliated sites | 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 Baystate Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jacob A. Chapman is one of 1,483 emergency medicine physicians in Massachusetts
Emergency medicine is Dr. Chapman's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Chapman is licensed in Massachusetts.
Specialties and state licenses
- Emergency medicine, MassachusettsPrimary
Emergency medicine physicians near Dr. Chapman
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. Jacob A. Chapman billed Medicare for 482 services in 2024
CMS data shows 482 Medicare services from Dr. Chapman across 4 procedure codes in 2024, for 437 Medicare patients. Medicare paid $57,815 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chapman's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5192024: 4827%
Dr. Chapman compared with the Massachusetts median for emergency medicine physicians, 2024
- Dr. Chapman
- Massachusetts median
- Medicare services
- 482vs 34141% above
- Medicare patients
- 437vs 33730% above
- Part D claims
- 52vs 3644% above
Medians across 1,477 emergency medicine physicians in Massachusetts with Dmand AI profiles that report each measure.
Dr. Chapman'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
Dr. Jacob A. Chapman treated 437 Medicare patients in 2024, average age 72
CMS counts 437 Medicare patients who saw Dr. Chapman in 2024. The largest group is 65 to 74, with 168 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 47% are also on Medicaid. Their average risk score is 1.61, 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. Chapman's median patient age at 59, with 54% women.
Dr. Chapman's Medicare patients by age, 2024
Dr. Chapman's Medicare patients by sex, 2024
- Women24055%
- Men19745%
Chronic conditions among Dr. Chapman's Medicare patients, 2024
- High blood pressure75%
- High cholesterol70%
- Arthritis53%
- Anxiety50%
- Mood disorders50%
- Depression46%
- Chronic kidney disease34%
- Diabetes30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chapman's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jacob A. Chapman wrote 118 Medicare Part D claims in 2024
In 2024, Dr. Chapman wrote 118 Medicare Part D claims for 84 patients. 97% of them were for generic drugs. CMS names the drug for 52 of them, across 3 drugs with 11 or more claims each, at $224 in total drug cost. In 2023, CMS named 41 claims across 3 drugs.
Dr. Chapman's Part D claims by kind of drug, 2024
- Generic114 claims97%
- Brand-name and other4 claims3%
Dr. Chapman's most prescribed drugs by claims, 2024
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. Chapman's Part D claims, 2024
- Opioids17%20 of 118 claims
- Antibiotics35%41 of 118 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 412024: 5227%
Drugs named by CMS: 3 in 2024, 3 in 2023.
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. Jacob A. Chapman takes part in Medicare
Dr. Chapman 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. Jacob A. Chapman received $55 in industry payments in 2023
CMS Open Payments shows 1 general payment to Dr. Chapman from 1 drug or device company in 2023. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $55.
Companies that paid Dr. Chapman the most, 2023 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jacob A. Chapman graduated from University of North Carolina at Chapel Hill School of Medicine
Dr. Chapman graduated from University of North Carolina at Chapel Hill School of Medicine in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jacob A. Chapman'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) |
| 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. Jacob A. Chapman
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. Jacob A. Chapman's NPI number?
Dr. Jacob A. Chapman's NPI number is 1790821338. It was assigned on January 30, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Jacob A. Chapman?
Dr. Jacob A. Chapman is an emergency medicine physician in Greenfield, Massachusetts. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Jacob A. Chapman practice?
Dr. Chapman practices at 164 High Street, Greenfield, MA 01301. Dr. Chapman's primary practice is Baystate Franklin Medical Center in Greenfield, Massachusetts, part of Baystate Health. Dmand AI also links Dr. Chapman to 1 community health center and 1 imaging center.
What is Dr. Jacob A. Chapman's office phone number?
The practice phone on file for Dr. Chapman is (413) 773-0211.
What is Dr. Jacob A. Chapman's medical license number?
Dr. Chapman holds Massachusetts license 230709.
Which hospitals is Dr. Jacob A. Chapman affiliated with?
Dr. Chapman practices at Baystate Franklin Medical Center in Greenfield, Massachusetts. Dr. Chapman is also affiliated with Cooley Dickinson Hospital.
What medical group is Dr. Jacob A. Chapman part of?
Dr. Chapman is linked to Baystate Medical Practices.
Does Dr. Jacob A. Chapman accept Medicare?
Yes. CMS data shows Dr. Chapman billed Medicare for 482 services in 2024, and Dr. Chapman accepts Medicare assignment.
How many Medicare patients does Dr. Jacob A. Chapman see?
CMS counts 437 Medicare patients who saw Dr. Chapman in 2024, with an average age of 72.
What services does Dr. Jacob A. Chapman bill to Medicare?
In 2024, Dr. Chapman's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and critical care (99291).
Show 4 more questionsShow fewer questions
Where did Dr. Jacob A. Chapman go to medical school?
Dr. Chapman graduated from University of North Carolina at Chapel Hill School of Medicine in 2004.
What drugs does Dr. Jacob A. Chapman prescribe most?
In 2024 Medicare Part D data, Dr. Chapman's most prescribed drugs by claims were Ondansetron ODT, Oxycodone HCl and Prednisone.
Has Dr. Jacob A. Chapman received payments from drug or device companies?
CMS Open Payments shows $55 in general payments to Dr. Chapman from 1 company from 2023 to 2023. The largest total came from Pfizer Inc.
How long has Dr. Jacob A. Chapman been practicing?
Dr. Chapman graduated from medical school in 2004, 22 years ago.
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