Dr. James Michael Bartz Jr., MD
- Medicare services, 2024
- 561
- Medicare patients, 2024
- 186
- Part D claims, 2024
- 154
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 2014 Washington Street, Newton, MA 02462
- Practice phone
- Call (617) 243-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Bartz's professional email, personal email and mobile number
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Dr. James Michael Bartz Jr. is an internist in Newton Lower Falls, Massachusetts
Dr. Bartz practices at Newton-Wellesley Hospital in Newton, Massachusetts, part of Mass General Brigham.
Dr. Bartz's NPI, 1801917372, was assigned on April 3, 2007. Dr. Bartz graduated from Emory University School of Medicine in 2005. Dr. Bartz holds Massachusetts license 234624.
- NPI
- 1801917372NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4981778065
- NPI enumeration date
- April 3, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 243-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 47
- Medical school graduation
- 2005
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Michael Bartz Jr. practices at Newton-Wellesley Hospital in Newton, Massachusetts
Dr. Bartz's primary practice is Newton-Wellesley Hospital, at 2014 Washington Street, Newton, MA 02462 in Middlesex County. The practice phone is (617) 243-6000.
- Newton-Wellesley Hospital2014 Washington Street, Newton, MA 02462 · Middlesex CountyPhone(617) 243-6000
Source: Dmand AI Affiliation Data
Dr. James Michael Bartz Jr. is affiliated with 4 sites of care and 1 medical group
Dr. Bartz's primary practice is Newton-Wellesley Hospital in Newton, Massachusetts, part of Mass General Brigham. The medical group on file is Mass General Brigham Medical Group. Dmand AI also links Dr. Bartz to 1 more group practice or clinic, 1 hospice and 1 hospital outpatient department, 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. James Michael Bartz Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Bartz practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Newton-Wellesley Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James Michael Bartz Jr. is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Bartz's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Bartz is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Bartz
Counts of internists 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. James Michael Bartz Jr. billed Medicare for 561 services in 2024
CMS data shows 561 Medicare services from Dr. Bartz across 5 procedure codes in 2024, for 186 Medicare patients. Medicare paid $52,256 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Bartz's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6772024: 56117%
Dr. Bartz compared with the Massachusetts median for internists, 2024
- Dr. Bartz
- Massachusetts median
- Medicare services
- 561vs 43130% above
- Medicare patients
- 186vs 194Close to median
- Part D claims
- 63vs 40284% below
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Bartz'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. Bartz and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Michael Bartz Jr. treated 186 Medicare patients in 2024, average age 81
CMS counts 186 Medicare patients who saw Dr. Bartz in 2024. The largest group is 85 and over, with 71 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 22% are also on Medicaid. Their average risk score is 2.55, 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. Bartz's median patient age at 82, with 60% women.
Dr. Bartz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Bartz's Medicare patients by sex, 2024
- Women9953%
- Men8747%
Chronic conditions among Dr. Bartz's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis62%
- Chronic kidney disease52%
- Anxiety51%
- Ischemic heart disease49%
- Mood disorders48%
- Depression44%
Share of Medicare patients with each condition. A patient can have several.
Dr. Bartz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 82
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James Michael Bartz Jr. wrote 154 Medicare Part D claims in 2024
In 2024, Dr. Bartz wrote 154 Medicare Part D claims for 36 patients. 81% of them were for generic drugs. CMS names the drug for 63 of them, across 4 drugs with 11 or more claims each, at $16,514 in total drug cost. In 2023, CMS named 13 claims across 1 drug.
Dr. Bartz's Part D claims by kind of drug, 2024
- Generic124 claims81%
- Brand-name30 claims19%
Dr. Bartz'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 132024: 63385%
Drugs named by CMS: 4 in 2024, 1 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. James Michael Bartz Jr. takes part in Medicare
Dr. Bartz 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. James Michael Bartz Jr. graduated from Emory University School of Medicine
Dr. Bartz graduated from Emory University School of Medicine in 2005.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James Michael Bartz Jr.'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) |
| 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. James Michael Bartz Jr.
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. James Michael Bartz Jr.'s NPI number?
Dr. James Michael Bartz Jr.'s NPI number is 1801917372. It was assigned on April 3, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. James Michael Bartz Jr.?
Dr. James Michael Bartz Jr. is an internist in Newton Lower Falls, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James Michael Bartz Jr. practice?
Dr. Bartz practices at 2014 Washington Street, Newton, MA 02462. Dr. Bartz's primary practice is Newton-Wellesley Hospital in Newton, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Bartz to 1 group practice or clinic, 1 hospice and 1 hospital outpatient department.
What is Dr. James Michael Bartz Jr.'s office phone number?
The practice phone on file for Dr. Bartz is (617) 243-6000.
What is Dr. James Michael Bartz Jr.'s medical license number?
Dr. Bartz holds Massachusetts license 234624.
Which hospitals is Dr. James Michael Bartz Jr. affiliated with?
Dr. Bartz practices at Newton-Wellesley Hospital in Newton, Massachusetts.
What medical group is Dr. James Michael Bartz Jr. part of?
Dr. Bartz is linked to Mass General Brigham Medical Group.
Does Dr. James Michael Bartz Jr. accept Medicare?
Yes. CMS data shows Dr. Bartz billed Medicare for 561 services in 2024, and Dr. Bartz accepts Medicare assignment.
How many Medicare patients does Dr. James Michael Bartz Jr. see?
CMS counts 186 Medicare patients who saw Dr. Bartz in 2024, with an average age of 81.
What services does Dr. James Michael Bartz Jr. bill to Medicare?
In 2024, Dr. Bartz's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
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Where did Dr. James Michael Bartz Jr. go to medical school?
Dr. Bartz graduated from Emory University School of Medicine in 2005.
What drugs does Dr. James Michael Bartz Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Bartz's most prescribed drugs by claims were Eliquis, Atorvastatin Calcium and Metoprolol Succinate.
How long has Dr. James Michael Bartz Jr. been practicing?
Dr. Bartz graduated from medical school in 2005, 21 years ago.
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