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Ada W. Chan, MD

Pathology · Los Gatos

NPI 1710291687

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
Not verified
Not the same as out of network.
Office
1

Offices

1 location · Associated Pathology Medical Group Inc · 7 clinicians in this group

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Plan participation

Not verified

We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Chan’s office at (408) 884-2712 to ask if they take your plan before you enroll.

California Medical Board record

Licence A106567 · Current

Licensed to practise in California · since 2009 · expires 2028-10-31 · Medical College of Jinan University.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

Original Medicare doctor bills

$35,103

Medicare paid this office $35,103 for 318 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Largest Original Medicare bills
Pathology examination of tissue using a microscope, intermediate complexity147$7,727$32
Pathology examination of tissue using a microscope, intermediate complexity44$5,904$72
Special stained specimen slides to examine tissue, each additional procedure33$3,869$25
Pathology examination of tissue using a microscope, moderately high complexity32$2,977$74
Special stained specimen slides to examine tissue, initial procedure63$2,526$31
See all 15 services
Every Original Medicare service billed
Pathology examination of tissue using a microscope, intermediate complexity147$7,727$32
Pathology examination of tissue using a microscope, intermediate complexity44$5,904$72
Special stained specimen slides to examine tissue, each additional procedure33$3,869$25
Pathology examination of tissue using a microscope, moderately high complexity32$2,977$74
Special stained specimen slides to examine tissue, initial procedure63$2,526$31
Microscopic genetic analysis of tumor, manual17$2,098$37
Special stained specimen slides to examine tissue, initial procedure11$1,362$114
Cell examination of specimen, selective cellular enhancement technique33$1,047$24
Cell examination of specimen, concentration technique30$731$20
Special stained specimen slides to identify organisms including interpretation and report11$599$24
Blood smear interpretation by physician with written report22$388$18
Preparation of tissue for examination by removing any calcium present25$291$11
Pathology examination of tissue using a microscope, moderately low complexity23$234$9
Special stained specimen slides to examine tissue including interpretation and report11$227$11
Pathology examination of tissue using a microscope, limited examination22$75$3

Who their Medicare patients are

318 Original Medicare patients in 2024. Average age 72 · Under 65 16% · 85 and older 14% · Women 55% · Also on Medicaid 50% · Health risk score 2.30. Above the middle of the specialty; the typical pathology clinician is at 1.55.

Conditions among them: High blood pressure 75% · Diabetes 50% · Chronic kidney disease 40% · Coronary heart disease 32% · Heart failure 30% · Atrial fibrillation 25% · Depression 25% · Cancer 20% · COPD 16% · Dementia 15% · Stroke 11%.

The office billed $357,843, Medicare allowed $44,857 and paid $35,103; for 969 services of 31 kinds.

Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.

Year by year

Original Medicare by year
2024318969722.30$357,843$35,103
2023381950732.58$384,615$29,988
20224311,129732.20$434,608$35,037
20214551,217732.15$474,994$40,418
20204031,155732.00$423,659$37,701
2019324873752.40$267,309$28,241
20183711,164752.01$282,805$39,094
20174061,333752.36$322,750$44,954
20163801,403752.05$322,887$47,384
20154461,603751.88$345,619$51,583
201497324741.49$77,335$9,475
2013293677741.59$108,888$21,939

Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.

See the services billed each year

2023: 14 services

Original Medicare services billed in 2023
Pathology examination of tissue using a microscope, intermediate complexity207$11,749$35
Pathology examination of tissue using a microscope, moderately high complexity43$4,699$77
Special stained specimen slides to examine tissue, each additional procedure32$3,644$26
Special stained specimen slides to examine tissue, initial procedure64$2,438$33
Microscopic genetic analysis of tumor, manual12$1,323$39
Cell examination of specimen, selective cellular enhancement technique47$1,283$26
Cell examination of specimen, concentration technique42$962$21
Blood smear interpretation by physician with written report27$602$22
Special stained specimen slides to identify organisms including interpretation and report12$543$25
Pathology examination of tissue using a microscope, moderately low complexity37$389$10
Special stained specimen slides to examine tissue including interpretation and report14$300$11
Preparation of tissue for examination by removing any calcium present17$196$12
Pathology examination of tissue using a microscope11$88$6
Pathology examination of tissue using a microscope, limited examination21$85$4

2022: 14 services

Original Medicare services billed in 2022
Pathology examination of tissue using a microscope, intermediate complexity231$15,202$35
Pathology examination of tissue using a microscope, moderately high complexity41$3,670$78
Special stained specimen slides to examine tissue, each additional procedure36$3,490$26
Special stained specimen slides to examine tissue, initial procedure78$2,969$33
Cell examination of specimen, selective cellular enhancement technique57$1,775$26
Microscopic genetic analysis of tumor, manual13$1,417$39
Cell examination of specimen, concentration technique42$954$21
Special stained specimen slides to identify organisms including interpretation and report19$838$25
Blood smear interpretation by physician with written report34$813$23
Pathology examination of tissue using a microscope, moderately low complexity51$620$11
Special stained specimen slides to examine tissue including interpretation and report22$361$11
Preparation of tissue for examination by removing any calcium present16$199$12
Pathology examination of tissue using a microscope, limited examination41$180$4
Pathology examination of tissue using a microscope11$77$6

2021: 13 services

Original Medicare services billed in 2021
Pathology examination of tissue using a microscope, intermediate complexity270$16,151$36
Pathology examination of tissue using a microscope, moderately high complexity60$6,779$78
Special stained specimen slides to examine tissue, each additional procedure41$3,585$27
Special stained specimen slides to examine tissue, initial procedure82$3,412$33
Microscopic genetic analysis of tumor, manual19$2,162$39
Special stained specimen slides to identify organisms including interpretation and report41$1,803$25
Cell examination of specimen, selective cellular enhancement technique46$1,452$26
Pathology examination of tissue using a microscope, moderately low complexity57$638$10
Special stained specimen slides to examine tissue including interpretation and report17$332$11
Clinical pathology consultation15$322$18
Preparation of tissue for examination by removing any calcium present25$319$12
Cell examination of specimen, concentration technique13$280$22
Pathology examination of tissue using a microscope, limited examination54$215$4

2020: 12 services

Original Medicare services billed in 2020
Pathology examination of tissue using a microscope, intermediate complexity246$15,846$37
Special stained specimen slides to examine tissue, each additional procedure45$6,568$27
Pathology examination of tissue using a microscope, moderately high complexity47$4,884$80
Special stained specimen slides to examine tissue, initial procedure62$2,688$34
Microscopic genetic analysis of tumor, manual20$2,135$41
Cell examination of specimen, selective cellular enhancement technique37$1,229$27
Special stained specimen slides to identify organisms including interpretation and report20$814$25
Pathology examination of tissue using a microscope, moderately low complexity51$644$11
Special stained specimen slides to examine tissue including interpretation and report21$404$12
Preparation of tissue for examination by removing any calcium present16$203$12
Pathology examination of tissue using a microscope, limited examination42$181$4
Pathology examination of tissue using a microscope14$105$7

2019: 10 services

Original Medicare services billed in 2019
Pathology examination of tissue using a microscope, intermediate complexity210$12,705$36
Pathology examination of tissue using a microscope, moderately high complexity40$4,028$79
Special stained specimen slides to examine tissue, each additional procedure32$2,829$27
Special stained specimen slides to examine tissue, initial procedure68$2,615$33
Cell examination of specimen, concentration technique33$914$21
Special stained specimen slides to identify organisms including interpretation and report17$627$25
Cell examination of specimen, selective cellular enhancement technique18$608$25
Pathology examination of tissue using a microscope, moderately low complexity42$502$10
Preparation of tissue for examination by removing any calcium present19$257$12
Pathology examination of tissue using a microscope, limited examination28$123$4

2018: 12 services

Original Medicare services billed in 2018
Pathology examination of tissue using a microscope, intermediate complexity245$15,321$35
Pathology examination of tissue using a microscope, moderately high complexity40$4,734$78
Special stained specimen slides to examine tissue, each additional procedure51$4,613$26
Special stained specimen slides to examine tissue, initial procedure117$4,269$32
Pathology examination of specimen during surgery, first tissue block13$1,946$59
Blood bank physician services for cross match and/or evaluation and written report23$1,221$47
Cell examination of specimen, concentration technique46$1,047$21
Special stained specimen slides to identify organisms including interpretation and report23$690$25
Pathology examination of tissue using a microscope, moderately low complexity44$643$11
Special stained specimen slides to examine tissue including interpretation and report16$492$11
Preparation of tissue for examination by removing any calcium present14$187$12
Pathology examination of tissue using a microscope, limited examination27$107$4

2017: 13 services

Original Medicare services billed in 2017
Pathology examination of tissue using a microscope, intermediate complexity274$16,991$34
Special stained specimen slides to examine tissue, each additional procedure61$5,520$26
Special stained specimen slides to examine tissue, initial procedure136$5,288$32
Pathology examination of tissue using a microscope, moderately high complexity41$4,853$77
Blood bank physician services for cross match and/or evaluation and written report26$2,597$46
Pathology examination of tissue using a microscope, high complexity14$1,907$136
Cell examination of specimen, concentration technique68$1,676$21
Pathology examination of specimen during surgery, first tissue block15$1,447$58
Special stained specimen slides to identify organisms including interpretation and report15$593$25
Pathology examination of tissue using a microscope, moderately low complexity45$540$11
Special stained specimen slides to examine tissue including interpretation and report20$497$11
Preparation of tissue for examination by removing any calcium present15$173$12
Pathology examination of tissue using a microscope, limited examination18$71$4

2016: 16 services

Original Medicare services billed in 2016
Pathology examination of tissue using a microscope, intermediate complexity255$18,718$36
Special stained specimen slides to examine tissue, each additional procedure42$6,421$25
Special stained specimen slides to examine tissue, initial procedure111$4,753$34
Pathology examination of tissue using a microscope, moderately high complexity43$4,460$80
Pathology examination of specimen during surgery, first tissue block20$2,151$60
Pathology examination of tissue using a microscope, high complexity14$2,117$141
Cell examination of specimen, concentration technique46$1,225$21
Special stained specimen slides to identify organisms including interpretation and report19$1,027$26
Pathology examination of tissue using a microscope, moderately low complexity46$584$11
Special stained specimen slides to examine tissue including interpretation and report28$539$11
Pathology examination of specimen during surgery11$376$34
Blood smear interpretation by physician with written report13$300$23
Cell examination of body fluid, simple filter method15$279$19
Preparation of tissue for examination by removing any calcium present12$144$12
Pathology examination of tissue using a microscope19$128$7
Pathology examination of tissue using a microscope, limited examination11$45$4

2015: 15 services

Original Medicare services billed in 2015
Pathology examination of tissue using a microscope, intermediate complexity290$19,110$35
Pathology examination of tissue using a microscope, moderately high complexity56$6,298$79
Special stained specimen slides to examine tissue, each additional procedure65$5,617$20
Special stained specimen slides to examine tissue, initial procedure139$5,421$33
Pathology examination of tissue using a microscope, intermediate complexity27$2,626$35
Pathology examination of specimen during surgery, first tissue block20$1,836$59
Cell examination of specimen, concentration technique70$1,765$22
Evaluation of fine needle aspirate with interpretation and report13$991$66
Special stained specimen slides to identify organisms including interpretation and report13$683$25
Pathology examination of tissue using a microscope, moderately low complexity53$595$11
Special stained specimen slides to examine tissue including interpretation and report22$517$11
Preparation of tissue for examination by removing any calcium present21$267$12
Cell examination of body fluid, simple filter method11$201$18
Pathology examination of tissue using a microscope15$95$6
Pathology examination of tissue using a microscope, limited examination12$57$4

2014: 4 services

Original Medicare services billed in 2014
Pathology examination of tissue using a microscope, intermediate complexity65$4,294$35
Immunohistochemistry or immunocytochemistry, per specimen; first single or multiplex antibody stain28$992$28
Special stained specimen slides to examine tissue including interpretation and report11$206$11
Pathology examination of tissue using a microscope, moderately low complexity14$153$10

2013: 7 services

Original Medicare services billed in 2013
Special stained specimen slides to examine tissue, initial procedure38$5,772$35
Pathology examination of tissue using a microscope, intermediate complexity127$5,099$27
Pathology examination of tissue using a microscope, moderately high complexity43$3,580$62
Surgical pathology, gross and microscopic examinations, for prostate needle biopsy, any method14$2,059$147
Cell examination of specimen, concentration technique79$1,276$16
Pathology examination of tissue using a microscope, moderately low complexity31$286$8
Preparation of tissue for examination by removing any calcium present18$161$9

Medicaid work

$9,035 in 2024

Medicaid paid $9,035 for 789 billed services this clinician did in 2024, up to 44 people in a month for one service.

Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.

Largest Medicaid services in 2024
TISSUE EXAM BY PATHOLOGIST474$5,173
Immunohistochemistry or immunocytochemistry, per specimen; initial single antibody stain procedure127$1,383
TISSUE EXAM BY PATHOLOGIST52$1,301
TISSUE EXAM BY PATHOLOGIST96$982
Cytopathology, concentration technique, smears and interpretation (eg, Saccomanno technique)12$113
Cytopathology, cervical or vaginal (any reporting system), collected in preservative fluid, automated thin layer preparation; with screening by automated system and manual rescreening or review, under physician supervision28$83
Medicaid work by year
2024789644$9,035
20231,254661$12,089
20221,074847$11,603
2021698432$7,222
2020445334$7,266
20194,98237329$7,018
201812,80244418$4,071
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
TISSUE EXAM BY PATHOLOGIST763$5,956
TISSUE EXAM BY PATHOLOGIST164$2,928
TISSUE EXAM BY PATHOLOGIST186$1,951
Immunohistochemistry or immunocytochemistry, per specimen; initial single antibody stain procedure89$1,104
Cytopathology, concentration technique, smears and interpretation (eg, Saccomanno technique)33$102
Cytopathology, selective cellular enhancement technique with interpretation (eg, liquid based slide preparation method), except cervical or vaginal19$48

2022

Largest Medicaid services in 2022
TISSUE EXAM BY PATHOLOGIST650$6,546
TISSUE EXAM BY PATHOLOGIST80$2,312
TISSUE EXAM BY PATHOLOGIST174$1,456
Immunohistochemistry or immunocytochemistry, per specimen; initial single antibody stain procedure88$1,009
Cytopathology, cervical or vaginal (any reporting system), collected in preservative fluid, automated thin layer preparation; with screening by automated system and manual rescreening or review, under physician supervision31$135
Cytopathology, concentration technique, smears and interpretation (eg, Saccomanno technique)12$87
Cytopathology, selective cellular enhancement technique with interpretation (eg, liquid based slide preparation method), except cervical or vaginal14$58
Pap test25$0

2021

Largest Medicaid services in 2021
TISSUE EXAM BY PATHOLOGIST396$4,091
TISSUE EXAM BY PATHOLOGIST152$1,637
TISSUE EXAM BY PATHOLOGIST95$1,303
Immunohistochemistry or immunocytochemistry, per specimen; initial single antibody stain procedure55$191

2020

Largest Medicaid services in 2020
TISSUE EXAM BY PATHOLOGIST297$4,325
TISSUE EXAM BY PATHOLOGIST47$1,635
TISSUE EXAM BY PATHOLOGIST101$1,305

2019

Largest Medicaid services in 2019
TISSUE EXAM BY PATHOLOGIST171$2,848
Infectious agent detection by nucleic acid (DNA or RNA); influenza virus, for multiple types or sub-types, includes multiplex reverse transcription, when performed, and multiplex amplified probe technique, first 2 types or sub-types165$836
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count931$616
COMPREHENSIVE METABOLIC PANEL601$551
Basic metabolic panel (Calcium, total) This panel must include the following: Calcium, total (82310) Carbon dioxide (bicarbonate) (82374) Chloride (82435) Creatinine (82565) Glucose (82947) Potassium (84132) Sodium (84295) Urea nitrogen (BUN) (84520)283$194
Infectious agent detection by nucleic acid (DNA or RNA); Streptococcus, group A, amplified probe technique40$159
ASSAY OF LIPASE243$150
Troponin, quantitative165$124
Measurement of magnesium178$114
Natriuretic peptide (heart and blood vessel protein) level53$112
Culture, bacterial; quantitative colony count, urine136$104
Infectious agent detection by nucleic acid (DNA or RNA); Chlamydia trachomatis, amplified probe technique31$99

2018

Largest Medicaid services in 2018
TISSUE EXAM BY PATHOLOGIST75$1,367
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count2,348$779
COMPREHENSIVE METABOLIC PANEL1,524$620
Immunohistochemistry or immunocytochemistry, per specimen; initial single antibody stain procedure12$194
Infectious agent detection by nucleic acid (DNA or RNA); influenza virus, for multiple types or sub-types, includes multiplex reverse transcription, when performed, and multiplex amplified probe technique, first 2 types or sub-types65$117
Natriuretic peptide (heart and blood vessel protein) level187$108
Troponin, quantitative486$103
Thyroid stimulating hormone (TSH)113$101
Basic metabolic panel (Calcium, total) This panel must include the following: Calcium, total (82310) Carbon dioxide (bicarbonate) (82374) Chloride (82435) Creatinine (82565) Glucose (82947) Potassium (84132) Sodium (84295) Urea nitrogen (BUN) (84520)743$83
BLOOD CULTURE FOR BACTERIA216$44
ASSAY OF LIPASE673$44
Measurement of magnesium502$40

Money from drug and device companies

$143 in 2025

Industry payments by year
202511None$143
201911None$106

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

Payments by company
InSightecExablate$143
1 payment
  • Meals for Exablate · 2025-08-26 · $143
See the published payment
Every published payment
InSightecMeals · 2025-08-26Exablate$143
See earlier years (2019)

2019: $106

Payments by company in 2019
E.R. Squibb & Sons L.L.C.None$106
1 payment
  • Meals · 2019-12-04 · $106

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
80.6 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI
1710291687
Licence
CA A106567California A106567: Current · expires 2028-10-31
Gender
Female
More record details
Sole proprietor
No
Taxonomy
Federal specialty code 207ZP0102X (207ZP0102X)
Mailing address
Po Box 26750, Fresno, CA, 93729
NPI first listed
2010-08-03
NPI last updated
2010-08-03

This is when the NPI record was last certified, not a medical board exam.