DR. ANDREW H CHERNAIK MD
NPI 1306818620
Internal Medicine in Louisville, CO
About Dr. Andrew H Chernaik Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANDREW H CHERNAIK MD (NPI 1306818620) is an individual internal medicine provider in Louisville, Colorado, licensed in Colorado (CDRH.43063) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Golden.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Andrew H Chernaik Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Andrew Chernaik reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Louisville, CO 80027
- Reassigned Medicare billing, Colorado enrollment
- 733 clinicians in this Medicare group
Westminster, CO 80020
- Reassigned Medicare billing, Colorado enrollment
- 142 clinicians in this Medicare group
Boulder, CO 80302
- Reassigned Medicare billing, Colorado enrollment
- 314 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 80027 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
LOUISVILLE, CO 80027
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 Andrew Chernaik's NPI number?
The NPI number for Andrew Chernaik is 1306818620. It was assigned to this individual provider in the NPPES registry on February 2, 2006.
Where is Andrew Chernaik located?
Andrew Chernaik practices at 100 Health Park Dr, Louisville, CO 80027. The listed phone number is (303) 673-1000.
What is Andrew Chernaik's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Andrew Chernaik enrolled in Medicare?
Yes. Andrew Chernaik is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Andrew Chernaik's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Chernaik reassigns Medicare benefits to 3 organizations: Portercare Adventist Health System (Louisville, CO), New West Physicians Inc (Westminster, CO) and Optumcare Colorado Medical Group LLC (Boulder, 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 Andrew Chernaik's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Andrew Chernaik was last updated on June 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Andrew H Chernaik, MD · NPI 1306818620
Internal Medicine physician in Louisville, Colorado. Individual provider, active in the CMS NPPES registry since February 2, 2006.
## Identity
- **NPI:** 1306818620 (Entity type: Individual)
- **Enumerated:** February 2, 2006
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** CDRH.43063 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 HEALTH PARK DR, Louisville, CO 80027-9583
- **Phone:** (303) 673-1000 · **Fax:** (303) 673-1204
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Portercare Adventist Health System (NPI 1023974268, Louisville, CO); New West Physicians Inc (NPI 1194343780, Westminster, CO); Optumcare Colorado Medical Group LLC (NPI 1922893478, Boulder, CO) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** June 29, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1306818620) · Data from the CMS NPPES public registry.