DR. HASSAN I. TAHSILDAR M.D.
NPI 1629067269
Internal Medicine - Medical Oncology in Green Bay, WI

Active since October 17, 2005PECOS EnrolledAccepts Medicare Assignment
1580 COMMANCHE AVE, GREEN BAY, WI 54313(920) 435-8326 Get Directions Write a Review

NPPES record last updated: January 14, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jan 14, 2021, Feb 10, 2016 (2 updates tracked since 2016).

About Dr. Hassan I. Tahsildar M.d. NPPES

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

DR. HASSAN I. TAHSILDAR M.D. (NPI 1629067269) is an individual medical oncology provider in Green Bay, Wisconsin, licensed in Wisconsin (54846-020) and active in the NPI registry since October 2005. He is enrolled in Medicare PECOS, is affiliated with Bellin Memorial Hospital, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1629067269
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameDR. HASSAN I. TAHSILDARCredential: M.D.
Location Address1580 COMMANCHE AVEGreen Bay, WI 54313-5751
Mailing AddressPo Box 22487Green Bay, WI 54305-2487 · (920) 445-7222 · Fax (920) 445-7289
Sole ProprietorNo
Medical School CMSOtherGraduated 1985
Enumeration DateOctober 17, 2005
Last NPPES UpdateJanuary 14, 20212 updates tracked since enumeration
NPPES CertifiedJanuary 14, 2021
NPI 1629067269 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License Licensed in WI · 54846-020
Definition

An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.

1580 COMMANCHE AVE, Green Bay, WI 54313

Secondary Practice Locations 3

Location 1820 Arbutus AveOconto, WI 54153-2004 · Phone (920) 835-1100 · Fax (920) 835-1099
Location 22820 Roosevelt RdMarinette, WI 54143-3834 · Phone (715) 735-5225 · Fax (715) 735-5388
Location 3744 S Webster AveGreen Bay, WI 54301-3505 · Phone (920) 433-3500 · Fax (920) 445-7301

Other Identifiers 1

Other144620American Board Of Internal Medidice/medical Oncology

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Hassan I. Tahsildar 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.

PECOS PAC ID244427961
PECOS Enrollment IDI20101207001253
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.

Areas of Expertise CMS Part B claims 3

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.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
213 services106 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
32 services25 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
21 services21 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Bellin Memorial Hospital

Acute Care Hospitals · Green Bay, WI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520049
Location744 S Webster AveGreen Bay, WI 54305 · Brown County
Emergency services Birthing friendly

Bellin Health Oconto Hospital

Critical Access Hospitals · Oconto, WI
OwnershipVoluntary non-profit - Private
CMS Certification Number521356
Location820 Arbutus AveOconto, WI 54153 · Oconto County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54313 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$163.24 typical visit price
range $53.90 – $163.24
Typical copayment $40.81 (range $13.47 – $40.81)
Most-billed visit code 99205
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

Internal Medicine (Hematology & Oncology)
1580 COMMANCHE AVE
GREEN BAY, WI 54313
Nurse Practitioner (Family)
1580 COMMANCHE AVE
GREEN BAY, WI 54313
Internal Medicine (Hematology & Oncology)
1580 COMMANCHE AVE
GREEN BAY, WI 54313
Family Medicine
1580 COMMANCHE AVE
GREEN BAY, WI 54313
Clinic/Center (Mental Health (Including Community Mental Health Center))
1580 COMMANCHE AVE
GREEN BAY, WI 54313
Nurse Practitioner (Family)
1580 COMMANCHE AVE
GREEN BAY, WI 54313
Nurse Practitioner (Adult Health)
1580 COMMANCHE AVE
GREEN BAY, WI 54313
Nurse Practitioner
1580 COMMANCHE AVE
GREEN BAY, WI 54313

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 Hassan Tahsildar's NPI number?

The NPI number for Hassan Tahsildar is 1629067269. It was assigned to this individual provider in the NPPES registry on October 17, 2005.

Where is Hassan Tahsildar located?

Hassan Tahsildar practices at 1580 Commanche Ave, Green Bay, WI 54313. The listed phone number is (920) 435-8326.

What is Hassan Tahsildar's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is Hassan Tahsildar enrolled in Medicare?

Yes. Hassan Tahsildar 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.

What insurance does Hassan Tahsildar accept?

Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, CareSource (Common Ground Healthcare) and HealthPartners list Hassan Tahsildar 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 Hassan Tahsildar affiliated with any hospitals?

According to CMS data, Hassan Tahsildar is affiliated with Bellin Memorial Hospital and Bellin Health Oconto Hospital.

When was this NPI record last updated?

The NPPES record for Hassan Tahsildar was last updated on January 14, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.