Are you Ann Z. Tan, M.D.? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 1200 N State St, Los Angeles County Medical Center, Gh Room 2900, Los Angeles, CA 90033
About Dr. Tan
Based in Los Angeles, CA, Ann Z. Tan, M.D. is listed in the NPI registry under anatomic & clinical pathology. According to Medicare claims data, Ann cared for 650 Medicare patients across 1,205 services. The services billed most often include pathology examination of tissue using a microscope, intermediate complexity, pathology examination of specimen during surgery, first tissue block, and special stained specimen slides to examine tissue, each additional procedure. NPI 1093976938 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (323) 226-7149
- Email not available
Practice Locations
1200 N STATE ST LOS ANGELES COUNTY MEDICAL CENTER, GH ROOM 2900
Los Angeles, CA 90033
Conditions Evaluated or Diagnosed
Within Anatomic & Clinical Pathology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Autoimmune & Joint
Blood cancer
Blood chemistry
Blood Disorders
- Bleeding Disorders
- Blood Clotting Gene Mutation
- Hemochromatosis
- High White Blood Cell Count
- Iron-deficiency anemia
Blood disorders
Cancer & Tumors
- Breast Cancer Biopsy Findings
- Leukemia
- Lipoma
- Prostate Cancer Biopsy Results
- Suspicious Lung Spot
- Swollen Lymph Nodes
Cervical & Women's Health
Cervical Health
Digestive pathology
Digestive System
- Abnormal Liver Enzymes
- Celiac disease
- H. pylori infection
- Inflammatory bowel disease
- Precancerous Colon Polyps
Hormones
Hormones & Metabolism
Infections
Infectious disease
Kidney & Urinary
Liver pathology
Prostate
Skin
Skin pathology
Urine & kidney
Procedures & services
Pathology Consultations
Biopsy & Tissue Testing
- Bone Marrow Biopsy Testing
- Colon Polyp Biopsy Examination
- Fine Needle Aspiration Biopsy
- Frozen Section During Surgery
- Skin Biopsy Lab Review
- Special Tissue Staining
- Thyroid Biopsy Examination
Blood chemistry
Cancer & Genetic Testing
- Chromosome And Genetic Testing
- Flow Cytometry Test
- Liquid Biopsy
- Tumor Biomarker Testing
- Tumor Marker Testing
Cancer screening
Cardiac testing
Cervical & Women's Health
Fertility testing
Hormone testing
Immunology
Infection & Microbiology Tests
- Blood Culture Test
- Colon cancer screening consult
- H. Pylori Breath Test
- STI and STD Screening
- Urine sediment test
Infectious disease
Inflammation testing
Post-Mortem & Forensic
Routine blood testing
Routine Blood Tests
- Blood Clotting Test
- Cholesterol screening
- Hemoglobin A1c Test
- Kidney Function Blood Test
- Liver Function Blood Test
- Routine blood work
- Thyroid Blood Test
Specialty Lab Panels
Tissue biopsy
Toxicology
Transfusion testing
Urine testing
Procedures Most Often Billed to Medicare
1,205 services · 650 patients · 13 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Pathology examination of tissue using a microscope, intermediate complexity | Lab test | 88305 |
503 | As often as other peers in Anatomic & Clinical Pathology |
| Pathology examination of specimen during surgery, first tissue block | Lab test | 88331 |
161 | More than most peers in Anatomic & Clinical Pathology |
| Special stained specimen slides to examine tissue, each additional procedure | Lab test | 88341 |
147 | As often as other peers in Anatomic & Clinical Pathology |
| Preparation of tissue for examination by removing any calcium present | Lab test | 88311 |
92 | More often than most peers in Anatomic & Clinical Pathology |
| Pathology examination of tissue using a microscope, moderately low complexity | Lab test | 88304 |
74 | More often than most peers in Anatomic & Clinical Pathology |
| Special stained specimen slides to examine tissue, initial procedure | Lab test | 88342 |
44 | Less often than most peers in Anatomic & Clinical Pathology |
| Blood smear interpretation by physician with written report | Lab test | 85060 |
43 | More often than most peers in Anatomic & Clinical Pathology |
| Pathology examination of tissue using a microscope, moderately high complexity | Lab test | 88307 |
33 | Less often than most peers in Anatomic & Clinical Pathology |
| Pathology examination of tissue using a microscope, limited examination | Lab test | 88300 |
28 | As often as other peers in Anatomic & Clinical Pathology |
| Cell examination of specimen, selective cellular enhancement technique | Lab test | 88112 |
23 | Less often than most peers in Anatomic & Clinical Pathology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other anatomic & clinical pathology specialists in Los Angeles 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 8 related providers in 1 group
Class of 2008 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What does Ann Z. Tan specialize in?
Ann Z. Tan is an anatomic & clinical pathology in Los Angeles, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Ann Z. Tan located?
Ann Z. Tan is listed at 1200 N State St Los Angeles County Medical Center, Gh Room 2900, Los Angeles, CA 90033. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Ann Z. Tan's phone number?
The number on file is (323) 226-7149. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Ann Z. Tan's NPI number?
Ann Z. Tan's National Provider Identifier is 1093976938. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Ann Z. Tan train?
Ann Z. Tan attended Other, graduating in 2008. This comes from the CMS National Downloadable File.
CMS public data
How long has Ann Z. Tan been practicing?
Ann Z. Tan has 18 years experience. Calculated from a graduation year of 2008, reported in the CMS National Downloadable File.
CMS public data
What does Ann Z. Tan do most often?
According to Medicare billing data, Ann Z. Tan the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Ann Z. Tan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Ann Z. Tan. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.