DR. MARK ROBERT BUSH MD
NPI 1144299751
Obstetrics & Gynecology - Reproductive Endocrinology in Littleton, CO
About Dr. Mark Robert Bush Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARK ROBERT BUSH MD (NPI 1144299751) is an individual reproductive endocrinology provider in Littleton, Colorado, licensed in Colorado (42370) and active in the NPI registry since March 2006. He has opted out of Medicare through July 25, 2028 and remains eligible to order and refer.
NPPES Registry Identity
Specialties & Licenses
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Opted out of Medicare
Dr. Mark Robert Bush Md has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from July 25, 2018 through July 25, 2028.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80129 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 7
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
HIGHLANDS RANCH, CO 80129
HIGHLANDS RANCH, CO 80129
HIGHLANDS RANCH, CO 80129
HIGHLANDS RANCH, CO 80129
LITTLETON, CO 80129
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 Bush's NPI number?
The NPI number for Mark Bush is 1144299751. It was assigned to this individual provider in the NPPES registry on March 16, 2006.
Where is Mark Bush located?
Mark Bush practices at 271 W County Line Rd, Littleton, CO 80129. The listed phone number is (303) 794-0045.
What is Mark Bush's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Reproductive Endocrinology, with taxonomy code 207VE0102X.
Is Mark Bush enrolled in Medicare?
No. Mark Bush has opted out of Medicare through July 25, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.
What insurance does Mark Bush accept?
Health plans from UnitedHealthcare list Mark Bush 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 Bush was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Dr. Mark Robert Bush, MD · NPI 1144299751
Reproductive Endocrinology physician in Littleton, Colorado. Individual provider, active in the CMS NPPES registry since March 16, 2006.
## Identity
- **NPI:** 1144299751 (Entity type: Individual)
- **Enumerated:** March 16, 2006
- **Primary specialty:** Obstetrics & Gynecology - Reproductive Endocrinology · taxonomy 207VE0102X
- **State license:** 42370 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 271 W COUNTY LINE RD, Littleton, CO 80129-1901
- **Phone:** (303) 794-0045
## Medicare
- **Medicare:** Opted out of Medicare (opt-out affidavit on file, in effect through July 25, 2028); services are provided under private contract
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1144299751) · Data from the CMS NPPES public registry.