Marvin Kastrop, D.D.S., M.S.
NPI 1336249929 · Orthodontics and Dentofacial Orthopedics Dentistry · Billings, MT
Marvin Kastrop, D.D.S., M.S. is a Orthodontics and Dentofacial Orthopedics Dentistry provider in Billings, MT (NPI 1336249929).
Provider details
- NPI number
- 1336249929
- Entity type
- Individual
- Primary specialty
- Orthodontics and Dentofacial Orthopedics DentistryDental Providers
- Credential
- D.D.S., M.S.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 1273 (MT)
Specialties & taxonomies
Dental Providers
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
- 2006-09-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is Marvin Kastrop's NPI number?
- Marvin Kastrop's National Provider Identifier (NPI) is 1336249929, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marvin Kastrop's specialty?
- Marvin Kastrop is listed in the NPPES registry with a primary specialty of Orthodontics and Dentofacial Orthopedics Dentistry (Dental Providers).
- Where is Marvin Kastrop located?
- Marvin Kastrop's practice location on file with NPPES is 1701 Avenue E, Billings, MT 59102-2999.
- What is Marvin Kastrop's phone number?
- The practice phone number listed in the NPPES registry for Marvin Kastrop is (406) 259-6774.
- Is Marvin Kastrop's NPI active?
- Yes — Marvin Kastrop's NPI (1336249929) 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.