IndividualActive
Douglas Janowski, M.D.
NPI 1700803855 · Gastroenterology Physician · Boston, MA
Douglas Janowski, M.D. is a Gastroenterology Physician provider in Boston, MA (NPI 1700803855).
Provider details
- NPI number
- 1700803855
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 203367 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
750 Washington St
Boston, MA 02111-1526
Phone: (617) 636-5000
Street-level locationGet directions
Mailing address
750 Washington St
Boston, MA 02111-1526
Registry dates
- Enumerated
- 2006-07-16
- Last updated
- 2007-07-08
Frequently asked questions
- What is Douglas Janowski's NPI number?
- Douglas Janowski's National Provider Identifier (NPI) is 1700803855, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Janowski's specialty?
- Douglas Janowski is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Janowski located?
- Douglas Janowski's practice location on file with NPPES is 750 Washington St, Boston, MA 02111-1526.
- What is Douglas Janowski's phone number?
- The practice phone number listed in the NPPES registry for Douglas Janowski is (617) 636-5000.
- Is Douglas Janowski's NPI active?
- Yes — Douglas Janowski's NPI (1700803855) 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.