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Mark Donowitz, M.D.
NPI 1306893342 · Gastroenterology Physician · Baltimore, MD
Mark Donowitz, M.D. is a Gastroenterology Physician provider in Baltimore, MD (NPI 1306893342).
Provider details
- NPI number
- 1306893342
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D02767 (MD)
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
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
600 N Wolfe St
Baltimore, MD 21287-0005
Phone: (410) 955-4166
Street-level locationGet directions
Mailing address
Po Box 64264
Baltimore, MD 21264-4264
Registry dates
- Enumerated
- 2006-05-27
- Last updated
- 2013-02-06
Frequently asked questions
- What is Mark Donowitz's NPI number?
- Mark Donowitz's National Provider Identifier (NPI) is 1306893342, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Donowitz's specialty?
- Mark Donowitz is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Donowitz located?
- Mark Donowitz's practice location on file with NPPES is 600 N Wolfe St, Baltimore, MD 21287-0005.
- What is Mark Donowitz's phone number?
- The practice phone number listed in the NPPES registry for Mark Donowitz is (410) 955-4166.
- Is Mark Donowitz's NPI active?
- Yes — Mark Donowitz's NPI (1306893342) is active in the NPPES registry as of the last update on 2013-02-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.