STEVEN WILLIAM SONNESYN MD
NPI 1275600231
Internal Medicine - Infectious Disease in Minneapolis, MN
About Steven William Sonnesyn Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN WILLIAM SONNESYN MD (NPI 1275600231) is an individual infectious disease provider in Minneapolis, Minnesota, licensed in Minnesota (34084) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Cambridge Medical Center, and is a graduate of University Of Colorado School Of Medicine, Denver (1987).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 5
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
Steven William Sonnesyn 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 Reassignment
Medicare enrollment records show Steven Sonnesyn reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Minneapolis, MN 55407
- Reassigned Medicare billing, Minnesota enrollment
- 3,733 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 7
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.
Cambridge Medical Center
Acute Care Hospitals · Cambridge, MNAbbott Northwestern Hospital
Acute Care Hospitals · Minneapolis, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 55407 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.
MINNEAPOLIS, MN 55407
MINNEAPOLIS, MN 55407
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 Steven Sonnesyn's NPI number?
The NPI number for Steven Sonnesyn is 1275600231. It was assigned to this individual provider in the NPPES registry on November 28, 2006.
Where is Steven Sonnesyn located?
Steven Sonnesyn practices at 800 E 28th St, Minneapolis, MN 55407. The listed phone number is (952) 746-8360.
What is Steven Sonnesyn's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Steven Sonnesyn enrolled in Medicare?
Yes. Steven Sonnesyn 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 Steven Sonnesyn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Sonnesyn reassigns Medicare benefits to Allina Health System (Minneapolis, MN). 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 Steven Sonnesyn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Steven Sonnesyn accept?
Health plans from HealthPartners list Steven Sonnesyn 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 Steven Sonnesyn affiliated with any hospitals?
According to CMS data, Steven Sonnesyn is affiliated with Cambridge Medical Center and Abbott Northwestern Hospital.
When was this NPI record last updated?
The NPPES record for Steven Sonnesyn was last updated on March 12, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Steven William Sonnesyn, MD · NPI 1275600231
Infectious Disease physician in Minneapolis, Minnesota. Individual provider, active in the CMS NPPES registry since November 28, 2006.
## Identity
- **NPI:** 1275600231 (Entity type: Individual)
- **Enumerated:** November 28, 2006
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 34084 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 E 28TH ST, Minneapolis, MN 55407-3723
- **Phone:** (952) 746-8360 · **Fax:** (952) 746-8368
## 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:** Allina Health System (NPI 1053354985, Minneapolis, MN), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Colorado School Of Medicine, Denver, class of 1987
## Record status
- **NPPES last updated:** March 12, 2015
- **Other identifiers:** Other 2T793S0 (MN); Medicaid 074865000 (MN); Other 440000823 (MN); and 2 more
---
Source: [NPI Profile](https://npiprofile.com/npi/1275600231) · Data from the CMS NPPES public registry.