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DR. MARK A. SIEMER D.O.
NPI 1871649368
Family Medicine in Colorado Springs, CO

Active since January 26, 2007PECOS EnrolledAccepts Medicare Assignment
13445 VOYAGER PKWY, COLORADO SPRINGS, CO 80921(719) 365-3220(719) 365-7681 Get Directions Write a Review

NPPES record last updated: October 30, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 27, 2022, Oct 8, 2019, Jan 15, 2019 (3 updates tracked since 2019).

About Dr. Mark A. Siemer D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARK A. SIEMER D.O. (NPI 1871649368) is an individual family medicine provider in Colorado Springs, Colorado, licensed in Colorado (DR.0034732) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, maintains 5 additional practice locations, and is a graduate of Nova Southeastern College Of Osteo Medicine (1994).

NPPES Registry Identity

NPI1871649368
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. MARK A. SIEMERCredential: D.O.
Location Address13445 VOYAGER PKWYColorado Springs, CO 80921-7648
Mailing Address13445 Voyager PkwyColorado Springs, CO 80921-7648 · (719) 365-3220 · Fax (719) 365-7681
Phone(719) 365-3220
Fax(719) 365-7681
Sole ProprietorYes
Medical School CMSNova Southeastern College Of Osteo MedicineGraduated 1994
Enumeration DateJanuary 26, 2007
Last NPPES UpdateOctober 30, 20253 updates tracked since enumeration
NPPES CertifiedOctober 30, 2025
✔ NPI 1871649368 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in CO · DR.0034732✔ Licensed in NC · 2005-00115
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
13445 VOYAGER PKWY, Colorado Springs, CO 80921
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Secondary Practice Locations 5

Location 1265 Tanglewood Ln, Ste E-1Silverthorne, CO 80498-5314 · Phone (970) 468-1003 · Fax (970) 262-2196
Location 24707 S Helena WayAurora, CO 80015 · Phone (720) 326-5032 · Fax (303) 693-8076
Location 3130 Plantation Ridge Dr Ste 100Mooresville, NC 28117-9239 · Phone (704) 316-1635 · Fax (704) 316-1636
Location 48420 University Exec Park Dr Ste 850Charlotte, NC 28262 · Phone (704) 316-1750 · Fax (704) 316-1755
Location 513445 Voyager PkwyColorado Springs, CO 80921-7648 · Phone (719) 365-3220

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Providence Health Plan, Select Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mark A. Siemer D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4284520495
PECOS Enrollment IDI20040225000271
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Mark Siemer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Catholic Health Initiatives Colorado
2.7 mi
Hospitalist
10860 NEW ALLEGIANCE DR
Colorado Springs, CO 80921
  • Reassigned Medicare billing, Colorado enrollment
  • 1,193 clinicians in this Medicare group
NPI 1063128296 (719) 776-8040
Poudre Valley Medical Group, LLC
97 mi
General Practice
2695 ROCKY MOUNTAIN AVE, SUITE 150
Loveland, CO 80538
  • Reassigned Medicare billing, Colorado enrollment
  • 2,596 clinicians in this Medicare group
NPI 1366763260 (970) 624-4420

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80921 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$89.43 typical visit price
range $58.06 – $174.82
Typical copayment $22.35 (range $14.51 – $43.70)
Most-billed visit code 99203
Established Patient
$102.03 typical visit price
range $18.88 – $142.79
Typical copayment $25.50 (range $4.72 – $35.69)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DAVID LINDBLAD EMPA-C
Physician Assistant
13445 VOYAGER PKWY
COLORADO SPRINGS, CO 80921
El Paso County (719) 219-0333
ALLISON MICHELLE WOOD ARNP
Nurse Practitioner
13445 VOYAGER PKWY
COLORADO SPRINGS, CO 80921
El Paso County (719) 219-0333
INTEGRITY URGENT CARE
Non-Pharmacy Dispensing Site
13445 VOYAGER PKWY
COLORADO SPRINGS, CO 80921
El Paso County (719) 591-2558
KATELYN DAKOTA JAE MCINTOSH FNP-C
Nurse Practitioner (Family)
13445 VOYAGER PKWY
COLORADO SPRINGS, CO 80921
El Paso County (719) 365-3220
POUDRE VALLEY MEDICAL GROUP, LLC
Clinic/Center (Urgent Care)
13445 VOYAGER PKWY
COLORADO SPRINGS, CO 80921
El Paso County (719) 219-0333
MRS. KATHLEEN JEAN DILDAY FNP-BC
Nurse Practitioner (Family)
13445 VOYAGER PKWY
COLORADO SPRINGS, CO 80921
El Paso County (719) 365-3220
ADRIANNA JULIET ALLEN APN
Nurse Practitioner (Family)
13445 VOYAGER PKWY
COLORADO SPRINGS, CO 80921
El Paso County (719) 219-0333
ROBERT J COWAN P.A.-C
Physician Assistant (Medical)
13445 VOYAGER PKWY
COLORADO SPRINGS, CO 80921
El Paso County (719) 219-0333

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Siemer's NPI number?

The NPI number for Mark Siemer is 1871649368. It was assigned to this individual provider in the NPPES registry on January 26, 2007.

Where is Mark Siemer located?

Mark Siemer practices at 13445 Voyager Pkwy, Colorado Springs, CO 80921. The listed phone number is (719) 365-3220.

What is Mark Siemer's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Mark Siemer enrolled in Medicare?

Yes. Mark Siemer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mark Siemer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Siemer reassigns Medicare benefits to 2 organizations: Catholic Health Initiatives Colorado (Colorado Springs, CO) and Poudre Valley Medical Group, LLC (Loveland, CO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Siemer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mark Siemer accept?

Health plans from Providence Health Plan and Select Health list Mark Siemer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mark Siemer was last updated on October 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.