Physician Profile
Katherine T. Johnston, M.D., M.A., M.SC.
Unclaimed ProfileAbout Dr. Johnston
Katherine T. Johnston, M.D., M.A., M.SC. practices internal medicine in Boston, MA. Medicare claims data shows Katherine provided 436 services to 295 patients. The services billed most often include established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more, 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', and insertion of needle into vein for collection of blood sample.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
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) 726-4900
- Email not available
Practice Locations
165 CAMBRIDGE ST STE 501
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
436 services · 295 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
73 | As often as other 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 |
134 | 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 |
92 | As often as other peers in Internal Medicine |
| Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Billing code | G0439 |
57 | As often as other 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 |
54 | Less often than most peers in Internal Medicine |
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
26 | As often as other peers in Internal Medicine |
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 7
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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 — 16 related providers in 2 groups
Other internists in Boston 8
Same specialty, same city.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in MA who bill this service to Medicare most often.
Common questions
What kind of doctor is Katherine T. Johnston, M.D., M.A.?
Katherine T. Johnston, M.D., M.A. 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
What is Katherine T. Johnston, M.D., M.A.'s address?
Katherine T. Johnston, M.D., M.A. is listed at 165 Cambridge St Ste 501, Boston, MA 02114. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Katherine T. Johnston, M.D., M.A.?
The number on file is (617) 726-4900. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Katherine T. Johnston, M.D., M.A.?
Katherine T. Johnston, M.D., M.A.'s National Provider Identifier is 1164469763. 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
How much experience does Katherine T. Johnston, M.D., M.A. have?
Katherine T. Johnston, M.D., M.A. has 20+ years experience. Registered with an NPI since 2006. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What procedures does Katherine T. Johnston, M.D., M.A. perform?
According to Medicare billing data, Katherine T. Johnston, M.D., M.A. performs procedures including insertion of needle into vein for collection of blood sample, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Katherine T. Johnston, M.D., M.A.'s profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Katherine T. Johnston, M.D., M.A.. 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.