DR. MIRZA OMER MAHMOOD BAIG M.D.
NPI 1285720490
Internal Medicine - Infectious Disease in Janesville, WI

Q: What is Mirza Omer Baig's NPI number?

The NPI number for Mirza Omer Baig is 1285720490. It was assigned to this individual provider in the NPPES registry on October 5, 2006.

Q: What is Mirza Omer Baig's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Q: When was this NPI record last updated?

The NPPES record for Mirza Omer Baig was last updated on February 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.

Active since October 05, 2006PECOS EnrolledAccepts Medicare Assignment

1000 MINERAL POINT AVE, JANESVILLE, WI 53548(608) 756-6868(608) 756-6289 Get Directions Write a Review

NPPES record last updated: February 10, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 10, 2025, Oct 27, 2020 (2 updates tracked since 2020).

On this page

About Dr. Mirza Omer Mahmood Baig M.d. NPPES

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

DR. MIRZA OMER MAHMOOD BAIG M.D. (NPI 1285720490) is an individual infectious disease provider in Janesville, Wisconsin, licensed in Wisconsin (61590) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Southeast Iowa Regional Medical Center, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1285720490

Entity TypeIndividualMale

Primary Taxonomy207RI0200X

Provider Legal NameDR. MIRZA OMER MAHMOOD BAIGCredential: M.D.

Location Address1000 MINERAL POINT AVEJanesville, WI 53548-2982

Mailing Address29624 Network PlChicago, IL 60673-1296 · (608) 741-7652 · Fax (608) 743-3260

Phone(608) 756-6868

Fax(608) 756-6289

Sole ProprietorNo

Medical School CMSOtherGraduated 1997

Enumeration DateOctober 5, 2006

Last NPPES UpdateFebruary 10, 20252 updates tracked since enumeration

NPPES CertifiedFebruary 10, 2025

✔ NPI 1285720490 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

Licenses✔ Licensed in WI · 61590✔ Licensed in IL · 036110972✔ Licensed in IA · 36686

Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

1000 MINERAL POINT AVE, Janesville, WI 53548

Open in Google Maps ↗

Secondary Practice Locations 2

Location 13801 Marquette StDavenport, IA 52806-5538 · Phone (563) 386-7860 · Fax (563) 386-7856

Location 28201 E Riverside BlvdRockford, IL 61114-2300 · Phone (815) 971-7000 · Fax (815) 968-4795

Other Identifiers 1

Medicaid1285720490IA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Wellmark Health Plan of Iowa, Inc..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. Mirza Omer Mahmood Baig 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 ID2668471715

PECOS Enrollment IDI20061219000072, I20090805000141, I20140221001644

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 Reassignments

Medicare enrollment records show Mirza Omer Baig reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Health System Corporation

Same address

General Acute Care Hospital

1000 MINERAL POINT AVE
Janesville, WI 53548

Reassigned Medicare billing, Wisconsin and Illinois enrollments
Also billed through NPI 1598718603 (Illinois)
1,155 clinicians in this Medicare group

NPI 1093768962 (608) 756-6000

Rockford Health Physicians

26 mi

Multi-Specialty

8201 E RIVERSIDE BLVD
Rockford, IL 61114

Reassigned Medicare billing, Illinois enrollment
1,375 clinicians in this Medicare group

NPI 1043242886 (608) 314-2428

Cgh Medical Center

70 mi

Family Medicine

101 E MILLER RD
Sterling, IL 61081

Reassigned Medicare billing, Illinois enrollment
356 clinicians in this Medicare group

NPI 1548540636 (815) 625-4790

Mercy Medical Center

142 mi

Psychiatry

5264 COUNCIL ST NE
Cedar Rapids, IA 52402

Reassigned Medicare billing, Iowa enrollment
387 clinicians in this Medicare group

NPI 1700834165 (319) 398-6575

Southeast Iowa Regional Medical Center, Inc.

169 mi

Family Planning, Non-Surgical

801 S ROOSEVELT AVE STE C
Burlington, IA 52601

Reassigned Medicare billing, Iowa enrollment
253 clinicians in this Medicare group

NPI 1962077230 (319) 768-1225

Sanford Clinic

330 mi

Pulmonary Disease

701 E 2ND ST
Ida Grove, IA 51445

Reassigned Medicare billing, South Dakota enrollment
826 clinicians in this Medicare group

NPI 1265457964 (712) 364-7341

Sanford Medical Center

393 mi

Family Medicine

1420 W 22NDST STE 104
Sioux Falls, SD 57105

Reassigned Medicare billing, South Dakota enrollment
1,097 clinicians in this Medicare group

NPI 1093090342 (605) 328-4897

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 10

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

338 services156 patients

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

106 services47 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

85 services53 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

72 services70 patients

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.

54 services37 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

21 services21 patients

Hospital Affiliations CMS Care Compare 4

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

Southeast Iowa Regional Medical Center

Acute Care Hospitals · West Burlington, IA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number160057

Location1221 South Gear AvenueWest Burlington, IA 52655 · Des Moines County

Emergency services Birthing friendly

Henry County Health Center

Critical Access Hospitals · Mount Pleasant, IA

OwnershipGovernment - Local

CMS Certification Number161356

Location407 S White StMount Pleasant, IA 52641 · Henry County

Emergency services

Mercy Health System Corp

Acute Care Hospitals · Janesville, WI

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520066

Location1000 Mineral Point AveJanesville, WI 53548 · Rock County

Emergency services Birthing friendly

Mercy Walworth Hospital & Medical Center

Critical Access Hospitals · Lake Geneva, WI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number521357

LocationN2950 State Road 67Lake Geneva, WI 53147 · Walworth County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53548 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

$123.69 typical visit price

range $53.90 – $163.24

Typical copayment $30.92 (range $13.47 – $40.81)

Most-billed visit code 99204

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.

BENJAMIN C. MILLER PMHNP

Nurse Practitioner (Psychiatric/Mental Health)

1000 MINERAL POINT AVE
JANESVILLE, WI 53548

Rock County (608) 756-6508

KARINA LAURA PAULIUS QUINN MD

Plastic Surgery

1000 MINERAL POINT AVE
JANESVILLE, WI 53548

Rock County (608) 756-6000

ALESIA L DRAKE DPT, PT

Physical Therapist

1000 MINERAL POINT AVE
JANESVILLE, WI 53548

Rock County (608) 756-6842

PAULINE R CASS PHARMD

Pharmacist

1000 MINERAL POINT AVE
JANESVILLE, WI 53548

Rock County (608) 756-6000

KAREN SAUNDERS OT

Occupational Therapist

1000 MINERAL POINT AVE
JANESVILLE, WI 53548

Rock County (608) 756-6000

DR. MERLE S RUST MD

Neurological Surgery

1000 MINERAL POINT AVE, MERCY WEST NEUROSURGERY
JANESVILLE, WI 53548

Rock County (608) 756-6826

DR. MICHAEL V COOGAN MD

Emergency Medicine (Medical Toxicology)

1000 MINERAL POINT AVE
JANESVILLE, WI 53548

Rock County (608) 756-6000

CHRISTOPHER B GOODAVISH PA

Physician Assistant

1000 MINERAL POINT AVE
JANESVILLE, WI 53548

Rock County (608) 756-6868

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 Mirza Omer Baig's NPI number?

The NPI number for Mirza Omer Baig is 1285720490. It was assigned to this individual provider in the NPPES registry on October 5, 2006.

Where is Mirza Omer Baig located?

Mirza Omer Baig practices at 1000 Mineral Point Ave, Janesville, WI 53548. The listed phone number is (608) 756-6868.

What is Mirza Omer Baig's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Mirza Omer Baig enrolled in Medicare?

Yes. Mirza Omer Baig 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 Mirza Omer Baig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mirza Omer Baig reassigns Medicare benefits to 7 organizations: Mercy Health System Corporation (Janesville, WI), Rockford Health Physicians (Rockford, IL), Cgh Medical Center (Sterling, IL), Mercy Medical Center (Cedar Rapids, IA), Southeast Iowa Regional Medical Center, Inc. (Burlington, IA) 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 Mirza Omer Baig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mirza Omer Baig accept?

Health plans from Wellmark Health Plan of Iowa, Inc. list Mirza Omer Baig 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 Mirza Omer Baig affiliated with any hospitals?

According to CMS data, Mirza Omer Baig is affiliated with Southeast Iowa Regional Medical Center, Henry County Health Center, Mercy Health System Corp and Mercy Walworth Hospital & Medical Center.

When was this NPI record last updated?

The NPPES record for Mirza Omer Baig was last updated on February 10, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.