TSUN SHENG KU
NPI 1659584738
Internal Medicine - Infectious Disease in Billings, MT
About Tsun Sheng Ku NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
TSUN SHENG KU (NPI 1659584738) is an individual infectious disease provider in Billings, Montana, licensed in Colorado (40605) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Billings Clinic, and maintains a secondary practice location in Highlands Ranch.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
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
Tsun Sheng Ku 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 Reassignment
Medicare enrollment records show Tsun Ku reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Billings, MT 59101
- Reassigned Medicare billing, Montana and Wyoming enrollments
- Also billed through NPI 1346288347 (Wyoming)
- 1,264 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Billings Clinic
Acute Care Hospitals · Billings, MTPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 59101 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
BILLINGS, MT 59101
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 Tsun Ku's NPI number?
The NPI number for Tsun Ku is 1659584738. It was assigned to this individual provider in the NPPES registry on May 7, 2007. The provider is also known as Tsun Sheng Ku M.D..
Where is Tsun Ku located?
Tsun Ku practices at 801 N 29th St, Billings, MT 59101. The listed phone number is (406) 238-2500.
What is Tsun Ku's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Tsun Ku enrolled in Medicare?
Yes. Tsun Ku 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 organization bills Medicare for Tsun Ku's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tsun Ku reassigns Medicare benefits to Billings Clinic (Billings, MT). The 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 Tsun Ku's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Tsun Ku accept?
Health plans from Blue Cross and Blue Shield of Montana, Mountain Health CO-OP, PacificSource Health Plans and Providence Health Plan list Tsun Ku 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 Tsun Ku affiliated with any hospitals?
According to CMS data, Tsun Ku is affiliated with Billings Clinic.
When was this NPI record last updated?
The NPPES record for Tsun Ku was last updated on February 28, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Tsun Sheng Ku · NPI 1659584738
Infectious Disease physician in Billings, Montana. Individual provider, active in the CMS NPPES registry since May 7, 2007.
## Identity
- **NPI:** 1659584738 (Entity type: Individual)
- **Enumerated:** May 7, 2007
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 40605 (Colorado)
- **Sole proprietor:** No
## Practice location
- **Address:** 801 N 29TH ST, Billings, MT 59101-0905
- **Phone:** (406) 238-2500
## 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:** Billings Clinic (NPI 1376598714, Billings, MT), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of South Alabama College Of Medicine, class of 2006
## Record status
- **NPPES last updated:** February 28, 2022
- **Other identifiers:** Medicaid 66658527 (CO)
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Source: [NPI Profile](https://npiprofile.com/npi/1659584738) · Data from the CMS NPPES public registry.