DR. PRESTON KEITH NEIN M.D.
NPI 1194807404
Family Medicine in Castle Rock, CO
About Dr. Preston Keith Nein M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. PRESTON KEITH NEIN M.D. (NPI 1194807404) is an individual family medicine provider in Castle Rock, Colorado, licensed in Colorado (43279) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Ogallala Community Hospital, and is a graduate of University Of Colorado School Of Medicine, Denver (2003).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Accepted 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. Preston Keith Nein M.d. 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.
Medicare Billing Reassignments
5Medicare enrollment records show Preston Nein reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Denver, CO 80220
- Reassigned Medicare billing, Colorado enrollment
- 47 clinicians in this Medicare group
Kremmling, CO 80459
- Reassigned Medicare billing, Colorado enrollment
- 75 clinicians in this Medicare group
Sidney, NE 69162
- Reassigned Medicare billing, Nebraska enrollment
- Also billed through NPI 1487736963 (Nebraska)
- 70 clinicians in this Medicare group
Holyoke, CO 80734
- Reassigned Medicare billing, Colorado enrollment
- Also billed through NPI 1891733879 (Colorado), NPI 1073520375 (Colorado)
- 26 clinicians in this Medicare group
Ogallala, NE 69153
- Reassigned Medicare billing, Nebraska enrollment
- 20 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Ogallala Community Hospital
Critical Access Hospitals · Ogallala, NESidney Regional Medical Center
Critical Access Hospitals · Sidney, NEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 Preston Nein's NPI number?
The NPI number for Preston Nein is 1194807404. It was assigned to this individual provider in the NPPES registry on October 19, 2006.
Where is Preston Nein located?
Preston Nein practices at 3887 Stone Canon Ranch Rd, Castle Rock, CO 80104. The listed phone number is (303) 246-7027.
What is Preston Nein's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Preston Nein enrolled in Medicare?
Yes. Preston Nein 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 Preston Nein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Preston Nein reassigns Medicare benefits to 5 organizations: Healthone Clinic Services - Primary Care LLC (Denver, CO), Kremmling Memorial Hospital District (Kremmling, CO), Cheyenne County Hospital Association, Inc. (Sidney, NE), East Phillips County Hospital District (Holyoke, CO) and Ogallala Community Hospital (Ogallala, NE). 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 Preston Nein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Preston Nein accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Blue Cross and Blue Shield of Nebraska and Oscar Insurance Company list Preston Nein 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.
Is Preston Nein affiliated with any hospitals?
According to CMS data, Preston Nein is affiliated with Ogallala Community Hospital and Sidney Regional Medical Center.
When was this NPI record last updated?
The NPPES record for Preston Nein was last updated on May 4, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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. Preston Keith Nein, M.D. · NPI 1194807404
Family Medicine physician in Castle Rock, Colorado. Individual provider, active in the CMS NPPES registry since October 19, 2006.
## Identity
- **NPI:** 1194807404 (Entity type: Individual)
- **Enumerated:** October 19, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 43279 (Colorado)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3887 STONE CANON RANCH RD, Castle Rock, CO 80104-2185
- **Phone:** (303) 246-7027
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Healthone Clinic Services - Primary Care LLC (NPI 1518141761, Denver, CO); Kremmling Memorial Hospital District (NPI 1619962321, Kremmling, CO); Cheyenne County Hospital Association, Inc. (NPI 1538858238, Sidney, NE); East Phillips County Hospital District (NPI 1912915893, Holyoke, CO); Ogallala Community Hospital (NPI 1710915467, Ogallala, NE) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Colorado School Of Medicine, Denver, class of 2003
## Record status
- **NPPES last updated:** May 4, 2021
- **Other identifiers:** Other 43279 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1194807404) · Data from the CMS NPPES public registry.