DR. DEREK STEVEN SERNA M.D.
NPI 1205044773
Internal Medicine - Hematology & Oncology in Waukesha, WI
About Dr. Derek Steven Serna M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DEREK STEVEN SERNA M.D. (NPI 1205044773) is an individual hematology & oncology provider in Waukesha, Wisconsin, licensed in Wisconsin (69134) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS, is affiliated with Waukesha Memorial Hospital, and is a graduate of Medical College Of Wisconsin (2005).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
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. Derek Steven Serna 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 Reassignment
Medicare enrollment records show Derek Serna reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Waukesha, WI 53188
- Reassigned Medicare billing, Wisconsin enrollment
- 528 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 10
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Waukesha Memorial Hospital
Acute Care Hospitals · Waukesha, WIOconomowoc Memorial Hospital
Acute Care Hospitals · Oconomowoc, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53188 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.
WAUKESHA, WI 53188
WAUKESHA, WI 53188
WAUKESHA, WI 53188
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 Derek Serna's NPI number?
The NPI number for Derek Serna is 1205044773. It was assigned to this individual provider in the NPPES registry on May 18, 2007.
Where is Derek Serna located?
Derek Serna practices at N16w24131 Riverwood Dr, Waukesha, WI 53188. The listed phone number is (262) 696-5690.
What is Derek Serna's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Derek Serna enrolled in Medicare?
Yes. Derek Serna 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 Derek Serna's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Derek Serna reassigns Medicare benefits to Prohealth Medical Group Inc. (Waukesha, WI). 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 Derek Serna's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Derek Serna accept?
Health plans from Anthem Blue Cross and Blue Shield, Dean Health Plan, Network Health and UnitedHealthcare list Derek Serna 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 Derek Serna affiliated with any hospitals?
According to CMS data, Derek Serna is affiliated with Waukesha Memorial Hospital and Oconomowoc Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Derek Serna was last updated on January 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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. Derek Steven Serna, M.D. · NPI 1205044773
Hematology & Oncology physician in Waukesha, Wisconsin. Individual provider, active in the CMS NPPES registry since May 18, 2007.
## Identity
- **NPI:** 1205044773 (Entity type: Individual)
- **Enumerated:** May 18, 2007
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 69134 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** N16W24131 RIVERWOOD DR, Waukesha, WI 53188-1106
- **Phone:** (262) 696-5690
## 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:** Prohealth Medical Group Inc. (NPI 1356322440, Waukesha, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Wisconsin, class of 2005
## Record status
- **NPPES last updated:** January 6, 2025
- **Other identifiers:** Medicaid 201035110 (IN); Other 000000721848 (IN)
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Source: [NPI Profile](https://npiprofile.com/npi/1205044773) · Data from the CMS NPPES public registry.