Karl Karlson, M.D.
NPI 1316939796 · Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Boston, MA
Karl Karlson, M.D. is a Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician provider in Boston, MA (NPI 1316939796).
Provider details
- NPI number
- 1316939796
- Entity type
- Individual
- Primary specialty
- Thoracic Surgery (Cardiothoracic Vascular Surgery) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 47636 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
21 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-22
- Last updated
- 2017-10-25
Frequently asked questions
- What is Karl Karlson's NPI number?
- Karl Karlson's National Provider Identifier (NPI) is 1316939796, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Karlson's specialty?
- Karl Karlson is listed in the NPPES registry with a primary specialty of Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Karlson located?
- Karl Karlson's practice location on file with NPPES is 732 Harrison Ave, Boston, MA 02118-2309.
- What is Karl Karlson's phone number?
- The practice phone number listed in the NPPES registry for Karl Karlson is (617) 638-5600.
- Is Karl Karlson's NPI active?
- Yes — Karl Karlson's NPI (1316939796) is active in the NPPES registry as of the last update on 2017-10-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.