DR. THEODORE J GRONSKI MD
NPI 1659320059
Internal Medicine - Pulmonary Disease in Milwaukee, WI
About Dr. Theodore J Gronski Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. THEODORE J GRONSKI MD (NPI 1659320059) is an individual pulmonary disease provider in Milwaukee, Wisconsin, licensed in Wisconsin (39890-020) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Aurora St Lukes Medical Center, and is a graduate of Medical College Of Wisconsin (1985).
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. Theodore J Gronski 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 Theodore Gronski reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Milwaukee, WI 53215
- Reassigned Medicare billing, Wisconsin enrollment
- 4,609 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 11
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.
Aurora St Lukes Medical Center
Acute Care Hospitals · Milwaukee, WIWest Allis Memorial Hospital
Acute Care Hospitals · West Allis, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53215 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 25
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.
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 Theodore Gronski's NPI number?
The NPI number for Theodore Gronski is 1659320059. It was assigned to this individual provider in the NPPES registry on May 10, 2006.
Where is Theodore Gronski located?
Theodore Gronski practices at 2900 W Oklahoma Ave, Milwaukee, WI 53215. The listed phone number is (414) 649-6572.
What is Theodore Gronski's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Theodore Gronski enrolled in Medicare?
Yes. Theodore Gronski 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 Theodore Gronski's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Theodore Gronski reassigns Medicare benefits to Aurora Medical Group, Inc. (Milwaukee, 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 Theodore Gronski's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Theodore Gronski accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare), HealthPartners and Quartz and 1 other insurer list Theodore Gronski 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 Theodore Gronski affiliated with any hospitals?
According to CMS data, Theodore Gronski is affiliated with Aurora St Lukes Medical Center and West Allis Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Theodore Gronski was last updated on August 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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. Theodore J Gronski, MD · NPI 1659320059
Pulmonary Disease physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since May 10, 2006.
## Identity
- **NPI:** 1659320059 (Entity type: Individual)
- **Enumerated:** May 10, 2006
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **State license:** 39890-020 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 2900 W OKLAHOMA AVE, Milwaukee, WI 53215-4330
- **Phone:** (414) 649-6572
## 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:** Aurora Medical Group, Inc. (NPI 1427271378, Milwaukee, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Medical College Of Wisconsin, class of 1985
## Record status
- **NPPES last updated:** August 11, 2025
- **Other identifiers:** Other 290011108 (WI); Medicaid 32454400 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1659320059) · Data from the CMS NPPES public registry.