Mark Klempner, M.D.
NPI 1740267582 · Infectious Disease Physician · Worcester, MA
Mark Klempner, M.D. is a Infectious Disease Physician provider in Worcester, MA (NPI 1740267582).
Provider details
- NPI number
- 1740267582
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 37113 (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
20 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
- 2005-12-22
- Last updated
- 2012-07-23
Frequently asked questions
- What is Mark Klempner's NPI number?
- Mark Klempner's National Provider Identifier (NPI) is 1740267582, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Klempner's specialty?
- Mark Klempner is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Klempner located?
- Mark Klempner's practice location on file with NPPES is 119 Belmont St, Worcester, MA 01605-2903.
- What is Mark Klempner's phone number?
- The practice phone number listed in the NPPES registry for Mark Klempner is (508) 856-1720.
- Is Mark Klempner's NPI active?
- Yes — Mark Klempner's NPI (1740267582) is active in the NPPES registry as of the last update on 2012-07-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.