1. Home
  2. Directory
  3. Wisconsin
  4. Milwaukee
  5. Transplant Surgery
  6. NPI Profile

DR. GELU OSIAN M.D.
NPI 1396991857
Transplant Surgery in Milwaukee, WI

Active since August 14, 2008PECOS Enrolled
9200 W WISCONSIN AVE, MILWAUKEE, WI 53226(414) 955-6920(414) 955-6222 Get Directions Write a Review

NPPES record last updated: March 28, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Gelu Osian M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GELU OSIAN M.D. (NPI 1396991857) is an individual transplant surgery provider in Milwaukee, Wisconsin, licensed in Wisconsin (70564) and active in the NPI registry since August 2008. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1396991857
Entity TypeIndividualMale
Primary Taxonomy204F00000X
Provider Legal NameDR. GELU OSIANCredential: M.D.
Location Address9200 W WISCONSIN AVEMilwaukee, WI 53226-3522
Mailing Address9200 W Wisconsin AveMilwaukee, WI 53226-3522 · (414) 955-6920 · Fax (414) 955-6222
Phone(414) 955-6920
Fax(414) 955-6222
Sole ProprietorNo
Enumeration DateAugust 14, 2008
Last NPPES UpdateMarch 28, 2019
✔ NPI 1396991857 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyTransplant SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code204F00000X
License✔ Licensed in WI · 70564
Definition
A surgeon who specializes in transplant surgery. Source: National Uniform Claim Committee
Also ListedSurgeryTaxonomy 208600000X · License 125055132 (IL), 70564 (WI)
9200 W WISCONSIN AVE, Milwaukee, WI 53226
Open in Google Maps ↗

Other Identifiers 1

Medicaid1396991857WI

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gelu Osian M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Gelu Osian reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Signify Health Medical Associates, PLLC
846 mi
General Practice
4055 VALLEY VIEW LN STE 700
Dallas, TX 75244
  • Reassigned Medicare billing, Maryland and Wisconsin enrollments
  • 227 clinicians in this Medicare group
NPI 1750845863 (972) 715-3800

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

TRACY BLAIR WANDTKE HERRMANN APNP, CNM
Advanced Practice Midwife
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Milwaukee County (414) 805-4777
DR. ZACHARY SMITH DO
Internal Medicine (Gastroenterology)
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Milwaukee County (414) 955-6830
DR. COLLEEN ANN CROWE M.D., M.P.H.
Emergency Medicine
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Milwaukee County (414) 805-6469
ROBERTO MEJIAS APNP
Nurse Practitioner (Pediatrics)
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Milwaukee County (414) 805-6600
MRS. ANNE E B LAKATOS APN-BC, APNP, RN
Nurse Practitioner (Adult Health)
9200 W WISCONSIN AVE, DEPT OF INTERNAL MEDICINE
MILWAUKEE, WI 53226
Milwaukee County (414) 805-6850
MRS. AMANDA M MANDERS APNP
Nurse Practitioner (Adult Health)
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Milwaukee County (414) 805-6850
KATHLEEN A WATERHOUSE-SKIBICKI CRNA
Nurse Anesthetist, Certified Registered
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Milwaukee County (414) 805-5951
ANDREA L BEQUEST PA
Physician Assistant (Medical)
9200 W WISCONSIN AVE, INTERNAL MEDICINE
MILWAUKEE, WI 53226
Milwaukee County (414) 955-0350

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 Gelu Osian's NPI number?

The NPI number for Gelu Osian is 1396991857. It was assigned to this individual provider in the NPPES registry on August 14, 2008.

Where is Gelu Osian located?

Gelu Osian practices at 9200 W Wisconsin Ave, Milwaukee, WI 53226. The listed phone number is (414) 955-6920.

What is Gelu Osian's specialty?

The primary specialty registered for this NPI is Transplant Surgery with taxonomy code 204F00000X.

Is Gelu Osian enrolled in Medicare?

Yes. Gelu Osian is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Gelu Osian's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gelu Osian reassigns Medicare benefits to Signify Health Medical Associates, PLLC (Dallas, TX). 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 Gelu Osian's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Gelu Osian was last updated on March 28, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.