Dr. Jennifer S. Haas, MD
- Medicare services, 2023
- 54
- Part D claims, 2024
- 171
- Hospital affiliations
- 2
- Industry payments
- $90
- Medical groups
- 2
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Haas' 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. Jennifer S. Haas is an internist in Boston, Massachusetts
Dr. Haas practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Haas' NPI, 1467419846, was assigned on April 28, 2006. Dr. Haas graduated from Harvard Medical School in 1986. Dr. Haas holds Massachusetts license 70335.
- NPI
- 1467419846NPI Registry (opens in a new tab)
- NPI enumeration date
- April 28, 2006
- NPI status
- Active
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Jennifer S. Haas practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Haas' primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Jennifer S. Haas is affiliated with 3 sites of care and 2 medical groups
Dr. Haas' primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Haas is also affiliated with Brigham and Women's Hospital. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Haas to 1 more community health center and 1 medical group, each named with a free account. Dr. Haas' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jennifer S. Haas' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Haas practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jennifer S. Haas is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Haas' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Haas is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Haas
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. Jennifer S. Haas billed Medicare for 54 services in 2023
CMS data shows 54 Medicare services from Dr. Haas across 1 procedure code in 2023, all of them office visits. Medicare paid $3,844 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Haas' Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 622023: 5413%
Dr. Haas compared with the Massachusetts median for internists, 2023
- Dr. Haas
- Massachusetts median
- Medicare services
- 54vs 43187% below
- Part D claims
- 23vs 40294% below
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Haas' most billed Medicare procedure codes, 2023
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. Haas?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Haas and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jennifer S. Haas' patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Haas' median patient age at 70, with 62% women.
Dr. Haas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women62%
- Men38%
Source: Dmand AI Patient Panel Data
Dr. Jennifer S. Haas wrote 171 Medicare Part D claims in 2024
In 2024, Dr. Haas wrote 171 Medicare Part D claims for 50 patients. 93% of them were for generic drugs. CMS names the drug for 23 of them, across 1 drug with 11 or more claims each, at $268 in total drug cost. In 2023, CMS named 236 claims across 11 drugs.
Dr. Haas' Part D claims by kind of drug, 2024
- Generic159 claims93%
- Brand-name12 claims7%
Dr. Haas' 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: 2362024: 2390%
Drugs named by CMS: 1 in 2024, 11 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
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Dr. Jennifer S. Haas received $90 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. Haas from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. W. L. Gore & Associates, Inc. paid the most, $90.
Companies that paid Dr. Haas the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jennifer S. Haas graduated from Harvard Medical School
Dr. Haas graduated from Harvard Medical School in 1986.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Jennifer S. Haas'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) |
| 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. Jennifer S. Haas
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. Jennifer S. Haas' NPI number?
Dr. Jennifer S. Haas' NPI number is 1467419846. It was assigned on April 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jennifer S. Haas?
Dr. Jennifer S. Haas is an internist in Boston, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Jennifer S. Haas practice?
Dr. Haas practices at 55 Fruit Street, Boston, MA 02114. Dr. Haas' primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Haas to 1 community health center and 1 medical group.
What is Dr. Jennifer S. Haas' office phone number?
The practice phone on file for Dr. Haas is (617) 726-2000.
What is Dr. Jennifer S. Haas' medical license number?
Dr. Haas holds Massachusetts license 70335.
Which hospitals is Dr. Jennifer S. Haas affiliated with?
Dr. Haas practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Haas is also affiliated with Brigham and Women's Hospital.
What medical group is Dr. Jennifer S. Haas part of?
Dr. Haas is linked to Massachusetts General Hospital. Dmand AI links Dr. Haas to 1 more medical group.
Does Dr. Jennifer S. Haas accept Medicare?
Yes. CMS data shows Dr. Haas billed Medicare for 54 services in 2023.
What services does Dr. Jennifer S. Haas bill to Medicare?
In 2023, Dr. Haas' most billed Medicare services were office visit, established patient (99214).
Where did Dr. Jennifer S. Haas go to medical school?
Dr. Haas graduated from Harvard Medical School in 1986.
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What drugs does Dr. Jennifer S. Haas prescribe most?
In 2024 Medicare Part D data, Dr. Haas' most prescribed drugs by claims were Atorvastatin Calcium.
Has Dr. Jennifer S. Haas received payments from drug or device companies?
CMS Open Payments shows $90 in general payments to Dr. Haas from 1 company from 2018 to 2018. The largest total came from W. L. Gore & Associates, Inc.
How long has Dr. Jennifer S. Haas been practicing?
Dr. Haas graduated from medical school in 1986, 40 years ago.
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