RANRAN ZHANG PH.D., M.D.
NPI 1205254539
Pathology - Anatomic Pathology & Clinical Pathology in Madison, WI

Q: What is Ranran Zhang's NPI number?

The NPI number for Ranran Zhang is 1205254539. It was assigned to this individual provider in the NPPES registry on April 3, 2014.

Q: What is Ranran Zhang's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Q: When was this NPI record last updated?

The NPPES record for Ranran Zhang was last updated on April 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 April 03, 2014PECOS EnrolledAccepts Medicare Assignment

91.86/100

CMS Quality Rating

UW HOSPITAL AND CLINICS 600 HIGHLAND AVE H4, MADISON, WI 53792(608) 262-7158 Get Directions Write a Review

NPPES record last updated: April 1, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 1, 2026, Jan 13, 2017 (2 updates tracked since 2017).

On this page

About Ranran Zhang Ph.d., M.d. NPPES

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

RANRAN ZHANG PH.D., M.D. (NPI 1205254539) is an individual anatomic pathology & clinical pathology provider in Madison, Wisconsin, licensed in Wisconsin (65896) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Mercy Health System Corp, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1205254539

Entity TypeIndividualFemale

Primary Taxonomy207ZP0102X

Provider Legal NameRANRAN ZHANGCredential: PH.D., M.D.

Location AddressUW HOSPITAL AND CLINICS 600 HIGHLAND AVE H4Madison, WI 53792-0001

Mailing AddressUw Hospitals & Clinics, 600 Highland AveMadison, WI 53792-0001

Phone(608) 262-7158

Sole ProprietorNo

Medical School CMSOtherGraduated 2013

Enumeration DateApril 3, 2014

Last NPPES UpdateApril 1, 20262 updates tracked since enumeration

NPPES CertifiedApril 1, 2026

✔ NPI 1205254539 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians

Taxonomy Code207ZP0102X

Licenses✔ Licensed in WI · 65896✔ Licensed in IL · 036.171342

Definition

A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

UW HOSPITAL AND CLINICS 600 HIGHLAND AVE H4, Madison, WI 53792

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Secondary Practice Locations 3

Location 11000 Mineral Point AveJanesville, WI 53548-2982 · Phone (608) 756-6868

Location 28201 E Riverside BlvdRockford, IL 61114-2300 · Phone (815) 971-5000

Location 31045 W Stephenson StFreeport, IL 61032-4864 · Phone (815) 599-6000

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource.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

Ranran Zhang Ph.d., 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 ID5193942738

PECOS Enrollment IDI20181015000756, I20240911003067

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 Ranran Zhang reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Health System Corporation

34 mi

General Acute Care Hospital

1000 MINERAL POINT AVE
Janesville, WI 53548

Reassigned Medicare billing, Wisconsin and Illinois enrollments
Also billed through NPI 1598718603 (Illinois), NPI 1699728550 (Wisconsin)
1,155 clinicians in this Medicare group

NPI 1093768962 (608) 756-6000

Freeport Memorial Hospital

54 mi

General Acute Care Hospital

1045 W STEPHENSON ST
Freeport, IL 61032

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

NPI 1447228788 (815) 599-6000

Rockford Health Physicians

56 mi

Anesthesiology

2400 N ROCKTON AVE
Rockford, IL 61103

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

NPI 1023275278 (815) 971-5000

Mercy Harvard Hospital Inc

61 mi

Critical Access

901 GRANT ST
Harvard, IL 60033

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

NPI 1427001445 (815) 943-5431

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 23

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.

Pathology examination of tissue using a microscope, intermediate complexity 88305

A pathology examination of tissue with intermediate complexity involves studying a small sample of your body tissue under a microscope. This helps in identifying any abnormal cells or signs of disease. It's a detailed process requiring expert analysis to ensure accurate results.

772 services398 patients

Special stained specimen slides to examine tissue, each additional procedure 88341

Special stained specimen slides are used to analyze tissue in detail. In this process, extra procedures may be needed for a more thorough examination. These involve applying special stains to the tissue on slides, enhancing specific elements for closer study.

382 services109 patients

Pathology examination of tissue using a microscope, intermediate complexity 88305

211 services119 patients

Special stained specimen slides to examine tissue, initial procedure 88342

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

162 services135 patients

Special stained specimen slides to examine tissue including interpretation and report 88313

Special stained specimen slides are used to examine tissue samples. This involves applying special dyes to the tissue, which helps to highlight certain features under a microscope. The findings are then interpreted and a report is provided. This can aid in diagnosing various health conditions.

128 services35 patients

Microscopic genetic analysis of tumor, manual 88360

Microscopic genetic analysis of a tumor involves examining your tumor's genes under a microscope. This helps identify specific genetic changes in the tumor cells. This information can aid in diagnosing, predicting disease progression, and determining the most effective treatment options.

92 services38 patients

Pathology examination of tissue using a microscope, moderately high complexity 88307

A pathology examination of tissue with moderate complexity involves a detailed study of a small tissue sample from your body. Using a microscope, experts analyze the tissue's structure and cells to identify any abnormalities. This helps in diagnosing various health conditions accurately.

85 services65 patients

Flow cytometry technique for dna or cell analysis, 16 or more markers 88189

Flow cytometry is a method used to measure and analyze cells. It uses a beam of light to detect up to 16 or more markers on cells, helping to identify their type, function, or abnormalities. This technique aids in diagnosing various health conditions.

56 services53 patients

Evaluation of fine needle aspirate with interpretation and report 88173

This procedure involves using a thin needle to collect a small sample from an abnormal area or lump. The sample is then examined under a microscope to identify any potential issues. A report of the findings is provided for further analysis.

55 services22 patients

Cell examination of specimen, concentration technique 88108

Cell examination of a specimen using a concentration technique is a lab process that enhances the detection of cells in a sample. This method helps to focus on key areas of the sample, making it easier to spot abnormalities or changes. It's a crucial part of diagnosing and monitoring certain health conditions.

51 services45 patients

Preparation of tissue for examination by removing any calcium present 88311

This procedure involves treating tissue samples to remove any calcium, which can interfere with the examination. The tissue is soaked in a special solution that safely dissolves the calcium, leaving the tissue intact for accurate analysis. This helps in making precise diagnoses.

50 services46 patients

Special stained specimen slides to examine tissue, each additional procedure 88341

50 services20 patients

Pathology examination of tissue using a microscope, moderately low complexity 88304

A pathology examination of tissue, moderately low complexity, involves studying a small sample of your body tissue under a microscope. It helps to identify any abnormal cells or diseases. It's a routine procedure, not complex, and provides crucial insights for your diagnosis.

47 services43 patients

Special stained specimen slides to identify organisms including interpretation and report 88312

This service involves coloring specimen slides in a special way to help identify organisms. The colors make different parts of the organism stand out. Afterward, a detailed interpretation and report on the findings are provided.

42 services23 patients

Special stained specimen slides to examine tissue, initial procedure 88342

31 services25 patients

Bone marrow, smear interpretation 85097

Bone marrow smear interpretation is a procedure where a small sample of your bone marrow is taken and examined under a microscope. This helps doctors identify any abnormal cells or signs of diseases such as anemia, leukemia, or infections. It's a crucial step in diagnosing various blood disorders.

30 services29 patients

Pathology examination of tissue using a microscope, limited examination 88300

A pathology examination of tissue using a microscope is a procedure where a small sample of your tissue is observed under a microscope. This limited examination helps identify any abnormal cells or signs of disease, aiding in accurate diagnosis and treatment planning.

26 services26 patients

Special stained specimen slides to examine tissue, each multiplex procedure 88344

Special stained specimen slides are used to study tissue in detail. This multiplex procedure involves applying different dyes to the tissue sample on a slide to highlight specific elements. These colors help identify any abnormalities in the tissue, aiding in accurate diagnosis and treatment planning.

24 services17 patients

Blood smear interpretation by physician with written report 85060

Blood smear interpretation is a lab test where your doctor examines a sample of your blood under a microscope. They look for abnormalities in your blood cells which can help diagnose various conditions. You'll receive a written report of the findings.

23 services22 patients

Microscopic genetic analysis of tissue, manual, initial procedure 88368

Microscopic genetic analysis of tissue is a test that examines your cells under a microscope. This helps to identify any genetic changes that could be causing health issues. It's the first step in a series of tests to pinpoint the root cause of your symptoms.

19 services17 patients

Microscopic genetic analysis of tissue, manual, each additional procedure 88369

Microscopic genetic analysis of tissue is a procedure where a small sample of your body tissue is examined under a microscope. This is done to study the genes in your cells. If more than one procedure is needed, each additional one involves repeating this process. It's a key part of diagnosing and managing many health conditions.

19 services17 patients

Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any method G0416

This procedure involves taking a small tissue sample from your gland located beneath your bladder. The sample is then examined under a microscope by a pathologist to check for any abnormalities or diseases. This is a standard method to ensure your well-being.

17 services15 patients

Cell examination of specimen, selective cellular enhancement technique 88112

Cell examination of a specimen using selective cellular enhancement technique is a lab process that improves the visibility of certain cells in a sample. It helps in identifying abnormalities or diseases. The process is non-invasive, safe, and aids in accurate diagnosis.

16 services16 patients

Hospital Affiliations CMS Care Compare 2

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

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 53792 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.

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.

91.86/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

83.72

Improvement Activities

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 Ranran Zhang's NPI number?

The NPI number for Ranran Zhang is 1205254539. It was assigned to this individual provider in the NPPES registry on April 3, 2014.

Where is Ranran Zhang located?

Ranran Zhang practices at Uw Hospital And Clinics 600 Highland Ave H4, Madison, WI 53792. The listed phone number is (608) 262-7158.

What is Ranran Zhang's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Ranran Zhang enrolled in Medicare?

Yes. Ranran Zhang 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 Ranran Zhang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Ranran Zhang reassigns Medicare benefits to 4 organizations: Mercy Health System Corporation (Janesville, WI), Freeport Memorial Hospital (Freeport, IL), Rockford Health Physicians (Rockford, IL) and Mercy Harvard Hospital Inc (Harvard, IL). 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 Ranran Zhang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Ranran Zhang accept?

Health plans from CareSource list Ranran Zhang 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 Ranran Zhang affiliated with any hospitals?

According to CMS data, Ranran Zhang is affiliated with Mercy Health System Corp and Mercy Walworth Hospital & Medical Center.

When was this NPI record last updated?

The NPPES record for Ranran Zhang was last updated on April 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.