Jeff Sienkiewicz, PA-C
- Medicare patients, 2024
- 53
- Part D claims, 2024
- 59
- Hospital affiliations
- 2
- Medical group
- 1
- State licenses
- 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 Jeff Sienkiewicz'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.
Jeff Sienkiewicz is a physician assistant in Boston, Massachusetts
Jeff Sienkiewicz practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Jeff Sienkiewicz's NPI, 1487326765, was assigned on October 4, 2021. Jeff Sienkiewicz holds Washington license PA61410321.
- NPI
- 1487326765NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8123496197
- NPI enumeration date
- October 4, 2021
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 30
- Medical school graduation
- 2022
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Jeff Sienkiewicz practices at Massachusetts General Hospital in Boston, Massachusetts
Jeff Sienkiewicz's 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
Jeff Sienkiewicz is affiliated with 4 sites of care and 1 medical group
Jeff Sienkiewicz's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Jeff Sienkiewicz is also affiliated with MultiCare Deaconess Hospital. The medical group on file is MultiCare Indigo Urgent Care, Spokane, Newport Hwy. Dmand AI also links Jeff Sienkiewicz to 1 more community health center and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Jeff Sienkiewicz's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Jeff Sienkiewicz practices, 4 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 |
| +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 Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
Jeff Sienkiewicz is one of 3,922 physician assistants in Massachusetts
Physician assistant is Jeff Sienkiewicz's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Dmand AI has Jeff Sienkiewicz's licenses on file in 2 states: Washington and Massachusetts.
Specialties and state licenses
- Physician assistant, WashingtonPrimary
- Massachusetts license
Physician assistants near Jeff Sienkiewicz
Counts of physician assistants 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
Jeff Sienkiewicz treated 53 Medicare patients in 2024, average age 72
CMS counts 53 Medicare patients who saw Jeff Sienkiewicz in 2024. The largest group is 75 to 84, with 25 patients. 74% of them have high blood pressure, and 70% have high cholesterol. Their average risk score is 1.04, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Jeff Sienkiewicz's median patient age at 37, with 57% women.
Jeff Sienkiewicz's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Jeff Sienkiewicz's Medicare patients by sex, 2024
- Women2649%
- Men2751%
Chronic conditions among Jeff Sienkiewicz's Medicare patients, 2024
- High blood pressure74%
- High cholesterol70%
- Arthritis38%
- Depression34%
- Mood disorders34%
- Anxiety21%
- Cancer21%
Share of Medicare patients with each condition. A patient can have several.
Jeff Sienkiewicz's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 37
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Jeff Sienkiewicz wrote 59 Medicare Part D claims in 2024
In 2024, Jeff Sienkiewicz wrote 59 Medicare Part D claims for 45 patients. 98% of them were for generic drugs.
Jeff Sienkiewicz's Part D claims by kind of drug, 2024
- Generic58 claims98%
- Brand-name and other1 claims2%
Drug classes CMS tracks in Jeff Sienkiewicz's Part D claims, 2024
- Antibiotics63%37 of 59 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Jeff Sienkiewicz takes part in Medicare
Jeff Sienkiewicz 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)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Sources for Jeff Sienkiewicz'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 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) |
| 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 Jeff Sienkiewicz
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Jeff Sienkiewicz's NPI number?
Jeff Sienkiewicz's NPI number is 1487326765. It was assigned on October 4, 2021, and it is active in the NPI Registry.
What does Jeff Sienkiewicz specialize in?
Jeff Sienkiewicz is a physician assistant in Boston, Massachusetts. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Jeff Sienkiewicz practice?
Jeff Sienkiewicz practices at 55 Fruit Street, Boston, MA 02114. Jeff Sienkiewicz's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Jeff Sienkiewicz to 1 community health center and 1 group practice or clinic.
What is Jeff Sienkiewicz's office phone number?
The practice phone on file for Jeff Sienkiewicz is (617) 726-2000.
What is Jeff Sienkiewicz's medical license number?
Jeff Sienkiewicz holds Washington license PA61410321, one of the licenses on file in 2 states.
Which states has Jeff Sienkiewicz been licensed in?
Dmand AI has state licenses on file for Jeff Sienkiewicz in Washington and Massachusetts.
Which hospitals is Jeff Sienkiewicz affiliated with?
Jeff Sienkiewicz practices at Massachusetts General Hospital in Boston, Massachusetts. Jeff Sienkiewicz is also affiliated with MultiCare Deaconess Hospital.
What medical group is Jeff Sienkiewicz part of?
Jeff Sienkiewicz is linked to MultiCare Indigo Urgent Care, Spokane, Newport Hwy.
Does Jeff Sienkiewicz accept Medicare?
Yes. CMS lists Jeff Sienkiewicz as accepting Medicare assignment.
How many Medicare patients does Jeff Sienkiewicz see?
CMS counts 53 Medicare patients who saw Jeff Sienkiewicz in 2024, with an average age of 72.
How long has Jeff Sienkiewicz been practicing?
Jeff Sienkiewicz graduated from medical school in 2022, 4 years ago.
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