Dr. Mark Jacob Siedner, MD
- Medicare services, 2024
- 178
- Medicare patients, 2024
- 59
- Publications
- 330
- Hospital affiliations
- 1
- 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. Siedner's professional email, personal email and mobile number
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Dr. Mark Jacob Siedner is an infectious disease specialist in Boston, Massachusetts
Dr. Siedner practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Siedner's NPI, 1548429178, was assigned on June 9, 2008. Dr. Siedner graduated from Johns Hopkins University School of Medicine in 2007. Dr. Siedner holds Massachusetts license 253779.
- NPI
- 1548429178NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971756107
- NPI enumeration date
- June 9, 2008
- 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
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Jacob Siedner practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Siedner'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
Dr. Mark Jacob Siedner is affiliated with 2 sites of care and 2 medical groups
Dr. Siedner's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Siedner to 1 more community health 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. Mark Jacob Siedner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Siedner practices, 2 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 |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Mark Jacob Siedner is one of 395 infectious disease specialists in Massachusetts
Infectious disease is Dr. Siedner's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Siedner is licensed in Massachusetts.
Specialties and state licenses
- Infectious disease, MassachusettsPrimary
Infectious disease specialists near Dr. Siedner
Counts of infectious disease specialists 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. Mark Jacob Siedner billed Medicare for 178 services in 2024
CMS data shows 178 Medicare services from Dr. Siedner across 4 procedure codes in 2024, for 59 Medicare patients. Medicare paid $15,759 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Siedner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1392024: 17828%
Dr. Siedner compared with the Massachusetts median for infectious disease specialists, 2024
- Dr. Siedner
- Massachusetts median
- Medicare services
- 178vs 1639% above
- Medicare patients
- 59vs 9437% below
Medians across 363 infectious disease specialists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Siedner'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. Siedner and other infectious disease specialists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Jacob Siedner treated 59 Medicare patients in 2024, average age 72
CMS counts 59 Medicare patients who saw Dr. Siedner in 2024. The largest group is under 65, with 17 patients. 75% of them have high blood pressure, and 69% have high cholesterol. 44% are also on Medicaid. Their average risk score is 3.96, 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. Siedner's median patient age at 41, with 0% women.
Dr. Siedner's Medicare patients by age, 2024
Dr. Siedner's Medicare patients by sex, 2024
- Women2746%
- Men3254%
Chronic conditions among Dr. Siedner's Medicare patients, 2024
- High blood pressure75%
- High cholesterol69%
- Anxiety59%
- Mood disorders59%
- Depression56%
- Arthritis54%
- Chronic kidney disease54%
- Ischemic heart disease53%
Share of Medicare patients with each condition. A patient can have several.
Dr. Siedner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 41
Patient panel by sex, all payers
- Women0%
- Men100%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Mark Jacob Siedner takes part in Medicare
Dr. Siedner 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. Mark Jacob Siedner has 330 publications on record
Dmand AI links 330 papers to Dr. Siedner, published from 2010 to 2025. 2023 was the busiest year, with 32. The most frequent topics are HIV Infections, Uganda and Anti-HIV Agents. Dr. Siedner has published most often in AIDS. Dr. Siedner's most frequent co-authors are Emily Beth Wong, MD, Jennifer M. Manne-Goehler, DSC, MD and Vincent Charles Marconi, MD.
Dr. Siedner's papers by year, 2016 to 2025
Topics Dr. Siedner writes about most
- HIV Infections
- Uganda
- Anti-HIV Agents
- Rural Population
- South Africa
- Viral Load
- Anti-Retroviral Agents
- COVID-19
Dr. Siedner's most frequent co-authors
- Emily Beth Wong, MD32 shared papers
- Jennifer M. Manne-Goehler, DSC, MD20 shared papers
- Vincent Charles Marconi, MD20 shared papers
Recent publications by Dr. Siedner
See who Dr. Siedner researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Siedner works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark Jacob Siedner graduated from Johns Hopkins University School of Medicine
Dr. Siedner graduated from Johns Hopkins University School of Medicine in 2007.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Jacob Siedner'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) |
| 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 |
| 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. Mark Jacob Siedner
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. Mark Jacob Siedner's NPI number?
Dr. Mark Jacob Siedner's NPI number is 1548429178. It was assigned on June 9, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Jacob Siedner?
Dr. Mark Jacob Siedner is an infectious disease specialist in Boston, Massachusetts. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Mark Jacob Siedner practice?
Dr. Siedner practices at 55 Fruit Street, Boston, MA 02114. Dr. Siedner's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Siedner to 1 community health center and 1 medical group.
What is Dr. Mark Jacob Siedner's office phone number?
The practice phone on file for Dr. Siedner is (617) 726-2000.
What is Dr. Mark Jacob Siedner's medical license number?
Dr. Siedner holds Massachusetts license 253779.
Which hospitals is Dr. Mark Jacob Siedner affiliated with?
Dr. Siedner practices at Massachusetts General Hospital in Boston, Massachusetts.
What medical group is Dr. Mark Jacob Siedner part of?
Dr. Siedner is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Siedner to 1 more medical group.
Does Dr. Mark Jacob Siedner accept Medicare?
Yes. CMS data shows Dr. Siedner billed Medicare for 178 services in 2024, and Dr. Siedner accepts Medicare assignment.
How many Medicare patients does Dr. Mark Jacob Siedner see?
CMS counts 59 Medicare patients who saw Dr. Siedner in 2024, with an average age of 72.
What services does Dr. Mark Jacob Siedner bill to Medicare?
In 2024, Dr. Siedner's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99223) and hospital inpatient care (99233).
Show 4 more questionsShow fewer questions
Where did Dr. Mark Jacob Siedner go to medical school?
Dr. Siedner graduated from Johns Hopkins University School of Medicine in 2007.
How long has Dr. Mark Jacob Siedner been practicing?
Dr. Siedner graduated from medical school in 2007, 19 years ago.
Does Dr. Mark Jacob Siedner do research?
Dmand AI links 330 publications to Dr. Siedner, published from 2010 to 2025.
Who does Dr. Mark Jacob Siedner publish with?
Dr. Siedner's most frequent co-authors are Emily Beth Wong, MD (32 shared papers), Jennifer M. Manne-Goehler, DSC, MD (20 shared papers) and Vincent Charles Marconi, MD (20 shared papers).
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