Tom Karson, M.D.
NPI 1497958961 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tom Karson, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1497958961).
Provider details
- NPI number
- 1497958961
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 150393 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 47 | 24 |
| Atorvastatin Calcium | 42 | 25 |
| Lisinopril | 40 | 17 |
| Losartan Potassium | 29 | 14 |
| Omeprazole | 28 | 13 |
| Metformin Hcl | 26 | 16 |
| Fluticasone Propionate | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-06-11
- Last updated
- 2019-12-06
Frequently asked questions
- What is Tom Karson's NPI number?
- Tom Karson's National Provider Identifier (NPI) is 1497958961, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tom Karson's specialty?
- Tom Karson is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tom Karson located?
- Tom Karson's practice location on file with NPPES is 72 E. Concord St, Boston, MA 02118.
- What is Tom Karson's phone number?
- The practice phone number listed in the NPPES registry for Tom Karson is (617) 638-6100.
- Does Tom Karson accept Medicare?
- Tom Karson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tom Karson's NPI active?
- Yes — Tom Karson's NPI (1497958961) is active in the NPPES registry as of the last update on 2019-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.