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Gary Marckstadt, MD
NPI 1053364091 · Family Medicine Physician · Sioux Falls, SD
Gary Marckstadt, MD is a Family Medicine Physician provider in Sioux Falls, SD (NPI 1053364091).
Provider details
- NPI number
- 1053364091
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 3887 (SD)
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
900 E 54th St N Ste 200
Sioux Falls, SD 57104-0686
Phone: (605) 332-2883
Fax: (605) 328-5831
Street-level locationGet directions
Mailing address
6110 S Minnesota Ave
Sioux Falls, SD 57108-2549
Registry dates
- Enumerated
- 2006-05-19
- Last updated
- 2019-09-06
Frequently asked questions
- What is Gary Marckstadt's NPI number?
- Gary Marckstadt's National Provider Identifier (NPI) is 1053364091, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Marckstadt's specialty?
- Gary Marckstadt is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gary Marckstadt located?
- Gary Marckstadt's practice location on file with NPPES is 900 E 54th St N Ste 200, Sioux Falls, SD 57104-0686.
- What is Gary Marckstadt's phone number?
- The practice phone number listed in the NPPES registry for Gary Marckstadt is (605) 332-2883.
- Is Gary Marckstadt's NPI active?
- Yes — Gary Marckstadt's NPI (1053364091) is active in the NPPES registry as of the last update on 2019-09-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.