Theodor Asgeirsson, MD
NPI 1255480067 · Colon & Rectal Surgery Physician · Greenville, MI
Enrolled with Medicare as Practitioner - Colorectal Surgery (proctology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Theodor Asgeirsson, MD is a Colon & Rectal Surgery Physician provider in Greenville, MI (NPI 1255480067).
Provider details
- NPI number
- 1255480067
- Entity type
- Individual
- Primary specialty
- Colon & Rectal Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 217561 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2007-01-10
- Last updated
- 2012-09-19
Frequently asked questions
- What is Theodor Asgeirsson's NPI number?
- Theodor Asgeirsson's National Provider Identifier (NPI) is 1255480067, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Theodor Asgeirsson's specialty?
- Theodor Asgeirsson is listed in the NPPES registry with a primary specialty of Colon & Rectal Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Theodor Asgeirsson located?
- Theodor Asgeirsson's practice location on file with NPPES is 421 S Baldwin St, Greenville, MI 48838-2102.
- What is Theodor Asgeirsson's phone number?
- The practice phone number listed in the NPPES registry for Theodor Asgeirsson is (616) 225-8667.
- Does Theodor Asgeirsson accept Medicare?
- Theodor Asgeirsson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Theodor Asgeirsson's NPI active?
- Yes — Theodor Asgeirsson's NPI (1255480067) is active in the NPPES registry as of the last update on 2012-09-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.