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ANN ZERA TAN M.D.
NPI 1093976938
Pathology - Anatomic Pathology & Clinical Pathology in Los Angeles, CA

Active since June 23, 2008PECOS EnrolledAccepts Medicare Assignment
100/100
CMS Quality Rating
1200 N STATE ST, LOS ANGELES COUNTY MEDICAL CENTER, GH ROOM 2900, LOS ANGELES, CA 90033(323) 226-7149 Get Directions Write a Review

NPPES record last updated: June 23, 2008. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Ann Zera Tan M.d. NPPES

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

ANN ZERA TAN M.D. (NPI 1093976938) is an individual anatomic pathology & clinical pathology provider in Los Angeles, California, licensed in California (A95082) and active in the NPI registry since June 2008. She is enrolled in Medicare PECOS and is a graduate of Other (2008).

NPPES Registry Identity

NPI1093976938
Entity TypeIndividualFemale
Primary Taxonomy207ZP0102X
Provider Legal NameANN ZERA TANCredential: M.D.
Location Address1200 N STATE ST, LOS ANGELES COUNTY MEDICAL CENTER, GH ROOM 2900Los Angeles, CA 90033-1029
Mailing Address2895 Shakespeare DrSan Marino, CA 91108-2230 · (323) 226-7149
Phone(323) 226-7149
Sole ProprietorNo
Medical School CMSOtherGraduated 2008
Enumeration DateJune 23, 2008
✔ NPI 1093976938 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in CA · A95082
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.
1200 N STATE ST, Los Angeles, CA 90033
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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

Ann Zera Tan 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 ID2163574963
PECOS Enrollment IDI20090708000544
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 13

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.
503 services234 patients
Pathology examination of specimen during surgery, first tissue block 88331
A pathology examination during surgery involves the immediate analysis of a removed tissue sample. This helps the surgeon make decisions during your operation. The "first tissue block" refers to the initial sample examined. It's a vital step to ensure your health.
161 services44 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.
147 services28 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.
92 services83 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.
74 services64 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.
44 services38 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.

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.

100/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality100
Improvement Activities40
Cost94.69

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.

DR. LUCILLE CHAILLE
Orthopaedic Surgery
1200 N STATE ST
LOS ANGELES, CA 90033
Los Angeles County (323) 226-2170
DR. THIENDANG VIET NGUYEN M.D.
Anesthesiology
1200 N STATE ST, #14-901
LOS ANGELES, CA 90033
Los Angeles County (323) 409-7748
DR. PHIL ORALLO CASTILLO M.D.
Anesthesiology
1200 N STATE ST, ROOM 14-901
LOS ANGELES, CA 90033
Los Angeles County (323) 226-4597
NOA CARTER STERLING M.D.
Obstetrics & Gynecology
1200 N STATE ST, INPT TOWER C3F107
LOS ANGELES, CA 90033
Los Angeles County (323) 409-8847
CHRYSTAL LYNNE JONES RCP
Respiratory Therapist, Certified (Critical Care)
1200 N STATE ST
LOS ANGELES, CA 90033
Los Angeles County (323) 409-1000
MAY SUNDONGMEI WU RESP THERAPIST
Respiratory Therapist, Registered (Critical Care)
1200 N STATE ST
LOS ANGELES, CA 90033
Los Angeles County (323) 409-1824
BRETT BARRO
Student in an Organized Health Care Education/Training Program
1200 N STATE ST, CLINIC TOWER SUITE A7D
LOS ANGELES, CA 90033
Los Angeles County (213) 705-5282
ALBERT CHEN MD
Student in an Organized Health Care Education/Training Program
1200 N STATE ST, CLINIC TOWER, SUITE A7D
LOS ANGELES, CA 90033
Los Angeles County (323) 442-7686

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 Ann Tan's NPI number?

The NPI number for Ann Tan is 1093976938. It was assigned to this individual provider in the NPPES registry on June 23, 2008.

Where is Ann Tan located?

Ann Tan practices at 1200 N State St Los Angeles County Medical Center, Gh Room 2900, Los Angeles, CA 90033. The listed phone number is (323) 226-7149.

What is Ann Tan's specialty?

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

Is Ann Tan enrolled in Medicare?

Yes. Ann Tan 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 Ann Tan was last updated on June 23, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.