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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. TIANNAN WANG M.D.
NPI 1003229329
Pathology - Cytopathology in Los Angeles, CA

Active since June 04, 2014PECOS EnrolledAccepts Medicare Assignment
1500 SAN PABLO ST RM 216, LOS ANGELES, CA 90033(323) 442-2582 Get Directions Write a Review

NPPES record last updated: August 11, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

Record update history: Aug 11, 2026, Sep 8, 2020, Jun 25, 2020 (3 updates tracked since 2020).

About Dr. Tiannan Wang M.d. NPPES

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

DR. TIANNAN WANG M.D. (NPI 1003229329) is an individual cytopathology provider in Los Angeles, California, licensed in California (A149981) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS, maintains a secondary practice location in Duarte, and is a graduate of Other (2000).

NPPES Registry Identity

NPI1003229329
Entity TypeIndividualFemale
Primary Taxonomy207ZC0500X
Provider Legal NameDR. TIANNAN WANGCredential: M.D.
Location Address1500 SAN PABLO ST RM 216Los Angeles, CA 90033-5313
Mailing AddressPo Box 31309Los Angeles, CA 90031-0309 · (323) 442-2582
Phone(323) 442-2582
Sole ProprietorNo
Medical School CMSOtherGraduated 2000
Enumeration DateJune 4, 2014
Last NPPES UpdateAugust 11, 20263 updates tracked since enumeration
NPPES CertifiedAugust 11, 2026
✔ NPI 1003229329 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPathology · CytopathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZC0500X
License✔ Licensed in CA · A149981
Definition
A cytopathologist is an anatomic pathologist trained in the diagnosis of human disease by means of the study of cells obtained from body secretions and fluids, by scraping, washing, or sponging the surface of a lesion, or by the aspiration of a tumor mass or body organ with a fine needle. A major aspect of a cytopathologist's practice is the interpretation of Papanicolaou-stained smears of cells from the female reproductive systems, the Pap test. However, the cytopathologist's expertise is applied to the diagnosis of cells from all systems and areas of the body. He/she is a consultant to all medical specialists.
Also ListedPathology · Anatomic Pathology & Clinical PathologyTaxonomy 207ZP0102X · License A149981 (CA)
1500 SAN PABLO ST RM 216, Los Angeles, CA 90033
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Secondary Practice Location 1

Location 11500 Duarte RdDuarte, CA 91010-3012 · Phone (800) 826-4673

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. Tiannan Wang 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 ID6800124678
PECOS Enrollment IDI20200513000950
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 6

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.
225 services138 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.
194 services53 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.
92 services36 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.
87 services67 patients
Surgical pathology consultation and report on referred slides prepared elsewhere 88321
A surgical pathology consultation involves reviewing slides prepared at a different lab to confirm or clarify a diagnosis. It's a second opinion to ensure accuracy. A report with findings and interpretations is then provided for your doctor's reference.
16 services16 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.
12 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90033 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

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 Tiannan Wang's NPI number?

The NPI number for Tiannan Wang is 1003229329. It was assigned to this individual provider in the NPPES registry on June 4, 2014.

Where is Tiannan Wang located?

Tiannan Wang practices at 1500 San Pablo St Rm 216, Los Angeles, CA 90033. The listed phone number is (323) 442-2582.

What is Tiannan Wang's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Cytopathology, with taxonomy code 207ZC0500X.

Is Tiannan Wang enrolled in Medicare?

Yes. Tiannan Wang 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.

When was this NPI record last updated?

The NPPES record for Tiannan Wang was last updated on August 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days 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.