Mark Siemer, D.O.
NPI 1871649368 · Family Medicine Physician · Colorado Springs, CO
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Siemer, D.O. is a Family Medicine Physician provider in Colorado Springs, CO (NPI 1871649368).
Provider details
- NPI number
- 1871649368
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2005-00115 (NC)
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
9 documented practice locations
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
Additional practice locations (8)
- 4707 S Helena WayAurora, CO 80015Phone: (720) 326-5032Fax: (303) 693-8076
- 4707 S Helena WayAurora, CO 80015Phone: (720) 326-5032Fax: (303) 693-8076
- 13445 Voyager PkwyColorado Springs, CO 80921-7648Phone: (719) 365-3220
- 265 Tanglewood LnSte E-1Silverthorne, CO 80498-5314Phone: (970) 468-1003Fax: (970) 262-2196
- 8420 University Exec Park Dr Ste 850Charlotte, NC 28262Phone: (704) 316-1750Fax: (704) 316-1755
- 8420 University Exec Park Dr Ste 850Charlotte, NC 28262Phone: (704) 316-1750Fax: (704) 316-1755
- 8420 University Exec Park Dr Ste 850Charlotte, NC 28262Phone: (704) 316-1750Fax: (704) 316-1755
- 130 Plantation Ridge Dr Ste 100Mooresville, NC 28117-9239
Registry dates
- Enumerated
- 2007-01-26
- Last updated
- 2025-10-30
- Certified
- 2025-10-30
Frequently asked questions
- What is Mark Siemer's NPI number?
- Mark Siemer's National Provider Identifier (NPI) is 1871649368, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Siemer's specialty?
- Mark Siemer is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Siemer located?
- Mark Siemer's practice location on file with NPPES is 13445 Voyager Pkwy, Colorado Springs, CO 80921-7648.
- What is Mark Siemer's phone number?
- The practice phone number listed in the NPPES registry for Mark Siemer is (719) 365-3220.
- Does Mark Siemer accept Medicare?
- Mark Siemer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Siemer's NPI active?
- Yes — Mark Siemer's NPI (1871649368) is active in the NPPES registry as of the last update on 2025-10-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.