IndividualActive
Mark Rumans, MD
NPI 1699858340 · Gastroenterology Physician · Billings, MT
Mark Rumans, MD is a Gastroenterology Physician provider in Billings, MT (NPI 1699858340).
Provider details
- NPI number
- 1699858340
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 5300 (MT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(90/100 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
2825 8th Ave N
Billings, MT 59101-0909
Phone: (406) 238-2500
Street-level locationGet directions
Mailing address
Po Box 35100
Billings, MT 59107-5100
Registry dates
- Enumerated
- 2006-10-23
- Last updated
- 2008-02-28
Frequently asked questions
- What is Mark Rumans's NPI number?
- Mark Rumans's National Provider Identifier (NPI) is 1699858340, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Rumans's specialty?
- Mark Rumans is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Rumans located?
- Mark Rumans's practice location on file with NPPES is 2825 8th Ave N, Billings, MT 59101-0909.
- What is Mark Rumans's phone number?
- The practice phone number listed in the NPPES registry for Mark Rumans is (406) 238-2500.
- Is Mark Rumans's NPI active?
- Yes — Mark Rumans's NPI (1699858340) is active in the NPPES registry as of the last update on 2008-02-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.