Physician Profile
Unclaimed ProfileAbout SIEDNER
Mark Jacob Siedner, MD practises infectious disease in Boston, MA. Mark is a 2007 graduate of Johns Hopkins University School of Medicine.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What does Dr. Siedner specialise in?
Dr. Siedner is an infectious disease in Boston, MA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INFECTIOUS DISEASE”.
NPI registry
Where is Dr. Siedner located?
Dr. Siedner is listed at 55 FRUIT ST MASSACHUSETTS GENERAL HOSPITAL GRJ504, Boston, MA 02114. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Siedner's phone number?
The number on file is (617) 726-3812. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Siedner's NPI number?
Dr. Siedner's National Provider Identifier is 1548429178. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Siedner go to medical school?
Dr. Siedner attended Johns Hopkins University School of Medicine, graduating in 2007. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Siedner been practising?
Dr. Siedner has 19 years experience. Calculated from a graduation year of 2007, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Siedner do most often?
According to Medicare billing data, Dr. Siedner the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Siedner confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Siedner. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (617) 726-3812
- Email not available
Practice Locations
55 FRUIT ST MASSACHUSETTS GENERAL HOSPITAL GRJ504
Boston, MA 02114
Procedures Most Often Billed to Medicare
178 services · 114 patients · 4 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
100 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
34 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
25 |
| Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Office visit | 99222 |
19 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other infectious diseases at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other infectious diseases in Boston 7
Same specialty, same city.
More connections — 16 related providers in 2 groups
Trained at Johns Hopkins University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2007 at Johns Hopkins University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.