DR. SUBRAMANIAN NATARAJAN MD
NPI 1457446767
Surgery in Chippewa Falls, WI
About Dr. Subramanian Natarajan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SUBRAMANIAN NATARAJAN MD (NPI 1457446767) is an individual surgery provider in Chippewa Falls, Wisconsin, licensed in Wisconsin (43546) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center - Eau Claire, and is a graduate of Other (1997).
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. Subramanian Natarajan Md 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
7Medicare enrollment records show Subramanian Natarajan reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Eau Claire, WI 54701
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1952890873 (Wisconsin)
- 2,476 clinicians in this Medicare group
Chetek, WI 54728
- Reassigned Medicare billing, Wisconsin enrollment
- 1,616 clinicians in this Medicare group
Neillsville, WI 54456
- Reassigned Medicare billing, Wisconsin enrollment
- 1,440 clinicians in this Medicare group
Marshfield, WI 54449
- Reassigned Medicare billing, Wisconsin enrollment
- 2,540 clinicians in this Medicare group
Park Falls, WI 54552
- Reassigned Medicare billing, Wisconsin enrollment
- Also billed through NPI 1700963048 (Wisconsin)
- 1,351 clinicians in this Medicare group
Iron River, MI 49935
- Reassigned Medicare billing, Michigan enrollment
- 136 clinicians in this Medicare group
Waupun, WI 53963
- Reassigned Medicare billing, Wisconsin enrollment
- 1,447 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 8
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.
Marshfield Medical Center - Eau Claire
Acute Care Hospitals · Eau Claire, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54729 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.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
CHIPPEWA FALLS, WI 54729
CHIPPEWA FALLS, WI 54729
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 Subramanian Natarajan's NPI number?
The NPI number for Subramanian Natarajan is 1457446767. It was assigned to this individual provider in the NPPES registry on October 3, 2006.
Where is Subramanian Natarajan located?
Subramanian Natarajan practices at 2655 County Highway I, Chippewa Falls, WI 54729. The listed phone number is (715) 726-4200.
What is Subramanian Natarajan's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Subramanian Natarajan enrolled in Medicare?
Yes. Subramanian Natarajan 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 Subramanian Natarajan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Subramanian Natarajan reassigns Medicare benefits to 7 organizations: Mchs Hospitals Inc (Eau Claire, WI), Lakeview Medical Center Inc Of Rice Lake (Chetek, WI), Memorial Hospital Inc (Neillsville, WI), Marshfield Clinic Inc (Marshfield, WI), Flambeau Hospital Inc (Park Falls, WI) and 2 more organizations, listed in the Medicare section above. 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 Subramanian Natarajan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Subramanian Natarajan accept?
Health plans from Anthem Blue Cross and Blue Shield, HealthPartners, Network Health, Sanford Health Plan and Security Health Plan list Subramanian Natarajan 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 Subramanian Natarajan affiliated with any hospitals?
According to CMS data, Subramanian Natarajan is affiliated with Marshfield Medical Center - Eau Claire.
When was this NPI record last updated?
The NPPES record for Subramanian Natarajan was last updated on June 9, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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. Subramanian Natarajan, MD · NPI 1457446767
Surgery physician in Chippewa Falls, Wisconsin. Individual provider, active in the CMS NPPES registry since October 3, 2006.
## Identity
- **NPI:** 1457446767 (Entity type: Individual)
- **Enumerated:** October 3, 2006
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** 43546 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 2655 COUNTY HIGHWAY I, Chippewa Falls, WI 54729-1423
- **Phone:** (715) 726-4200
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Mchs Hospitals Inc (NPI 1316416035, Eau Claire, WI); Lakeview Medical Center Inc Of Rice Lake (NPI 1659008605, Chetek, WI); Memorial Hospital Inc (NPI 1033701800, Neillsville, WI); Marshfield Clinic Inc (NPI 1952347981, Marshfield, WI); Flambeau Hospital Inc (NPI 1194317966, Park Falls, WI); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1997
## Record status
- **NPPES last updated:** June 9, 2023
- **Other identifiers:** Medicaid 4703180 (MI); Medicaid 34978000 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1457446767) · Data from the CMS NPPES public registry.