Physician Profile
Megan A. Koster, MD
Unclaimed ProfileAbout Dr. Koster
Megan A. Koster, MD practices internal medicine in Boston, MA. Megan is a 2014 graduate of Harvard Medical School. According to Medicare claims data, Megan cared for 411 Medicare patients across 734 services. The services billed most often include critical care, first 30-74 minutes, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and critical care, each additional 30 minutes.
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
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (617) 726-2865
- Email not available
Practice Locations
MASSACHUSETTS GENERAL HOSPITAL 55 FRUIT STREET
Boston, MA 02114
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Infectious disease
Kidney and urinary
Respiratory
Blood & Circulation
Blood disorders
Brain & Nerves
Brain and nerves
Cardiac and vascular
Digestive
Heart & Circulation
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Most searched procedures
Preventive and evaluation
Screening and diagnostic testing
Bones & Joints
Brain and nerves
Cancer screening
Digestive
Exams & Consultations
Heart & Circulation
Heart health
Imaging referral
Immunizations
Lab tests
Lungs & Breathing
Metabolic & Weight
Minor procedures
Office procedures
Office Procedures
Pain management
Preventive & Routine Care
Screenings & Diagnostics
Sexual health
Procedures Most Often Billed to Medicare
734 services · 411 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of non-tunneled central venous tube for infusion (5 years or older) | Procedure | 36556 |
11 | |
| Critical care, first 30-74 minutes | Office visit | 99291 |
222 | More than most peers in Internal Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
142 | As often as other peers in Internal Medicine |
| Critical care, each additional 30 minutes | Office visit | 99292 |
128 | More than most peers in Internal Medicine |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
108 | More often than most peers in Internal Medicine |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
70 | As often as other peers in Internal Medicine |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
37 | |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
16 |
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 internists at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
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.
More connections — 28 related providers in 4 groups
Other internists in Boston 6
Same specialty, same city.
Trained at Harvard Medical School 6
Other providers in the same specialty who trained at the same institution.
Class of 2014 at Harvard Medical School 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of non-tunneled central venous tube for infusion (5 years or older) 8
Providers in MA who bill this service to Medicare most often.
Common questions
What is Dr. Koster's specialty?
Dr. Koster is an internist in Boston, MA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where can I find Dr. Koster?
Dr. Koster is listed at Massachusetts General Hospital 55 Fruit Street, Boston, MA 02114. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Dr. Koster?
The number on file is (617) 726-2865. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Koster's NPI number?
Dr. Koster's National Provider Identifier is 1891108734. 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
What is Dr. Koster's medical education?
Dr. Koster attended Harvard Medical School, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Koster been practicing?
Dr. Koster has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
What is Dr. Koster known for?
According to Medicare billing data, Dr. Koster performs procedures including insertion of non-tunneled central venous tube for infusion, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Koster confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Koster. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.