Leszek Karowiec, MD
NPI 1265519672 · Internal Medicine Physician · Gaithersburg, MD
Leszek Karowiec, MD is a Internal Medicine Physician provider in Gaithersburg, MD (NPI 1265519672).
Provider details
- NPI number
- 1265519672
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D35859 (MD)
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is Leszek Karowiec's NPI number?
- Leszek Karowiec's National Provider Identifier (NPI) is 1265519672, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leszek Karowiec's specialty?
- Leszek Karowiec is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Leszek Karowiec located?
- Leszek Karowiec's practice location on file with NPPES is 501 North Frederick Avenue, Gaithersburg, MD 20877-2598.
- What is Leszek Karowiec's phone number?
- The practice phone number listed in the NPPES registry for Leszek Karowiec is (301) 258-7265.
- Is Leszek Karowiec's NPI active?
- Yes — Leszek Karowiec's NPI (1265519672) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.