Total Payments
$239.66
2024 Payments
$21.45
Companies
7
Transactions
14
Medicare Patients
3,041
Medicare Billing
$158,175
Payment Breakdown by Category
Food & Beverage$239.66 (100.0%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Food and Beverage | $239.66 | 14 | 100.0% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| Beckman Coulter, Inc. | $75.89 | 5 | $0 (2020) |
| Merck Sharp & Dohme LLC | $56.22 | 3 | $0 (2024) |
| Otsuka America Pharmaceutical, Inc. | $31.40 | 2 | $0 (2018) |
| Shionogi Inc | $26.19 | 1 | $0 (2022) |
| Octapharma USA, Inc. | $19.11 | 1 | $0 (2020) |
| Alexion Pharmaceuticals, Inc. | $16.17 | 1 | $0 (2020) |
| Cerus Corporation | $14.68 | 1 | $0 (2018) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $21.45 | 1 | Merck Sharp & Dohme LLC ($21.45) |
| 2022 | $49.67 | 2 | Shionogi Inc ($26.19) |
| 2020 | $58.50 | 3 | Beckman Coulter, Inc. ($23.22) |
| 2019 | $10.87 | 1 | Beckman Coulter, Inc. ($10.87) |
| 2018 | $73.14 | 5 | Beckman Coulter, Inc. ($41.80) |
| 2017 | $26.03 | 2 | Otsuka America Pharmaceutical, Inc. ($14.74) |
All Payment Transactions
14 individual payment records from CMS Open Payments
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 04/17/2024 | Merck Sharp & Dohme LLC | DIFICID (Drug), RECARBRIO, ZERBAXA | Food and Beverage | In-kind items and services | $21.45 | General |
| Category: INFECTIOUS DISEASE | ||||||
| 04/28/2022 | Shionogi Inc | Fetroja (Drug) | Food and Beverage | In-kind items and services | $26.19 | General |
| Category: Infections and Infectious Diseases | ||||||
| 04/26/2022 | Merck Sharp & Dohme LLC | DIFICID (Drug), ZERBAXA, RECARBRIO | Food and Beverage | In-kind items and services | $23.48 | General |
| Category: INFECTIOUS DISEASE | ||||||
| 05/21/2020 | Octapharma USA, Inc. | OCTAPLAS (Biological) | Food and Beverage | In-kind items and services | $19.11 | General |
| Category: INTENSIVE CAREEMERGENCY | ||||||
| 04/23/2020 | Beckman Coulter, Inc. | UNICEL DXH (Device) | Food and Beverage | In-kind items and services | $23.22 | General |
| Category: HEMATOLOGY | ||||||
| 04/23/2020 | Alexion Pharmaceuticals, Inc. | Ultomiris (Drug) | Food and Beverage | In-kind items and services | $16.17 | General |
| Category: Immunology | ||||||
| 04/26/2019 | Beckman Coulter, Inc. | DXH 900 (Device) | Food and Beverage | In-kind items and services | $10.87 | General |
| Category: HEMATOLOGY | ||||||
| 09/13/2018 | Beckman Coulter, Inc. | — | Food and Beverage | In-kind items and services | $17.24 | General |
| 04/30/2018 | Otsuka America Pharmaceutical, Inc. | BREATHTEK (Device) | Food and Beverage | In-kind items and services | $16.66 | General |
| Category: GASTROENTEROLOGY | ||||||
| 04/25/2018 | Beckman Coulter, Inc. | UNICEL DXH (Device) | Food and Beverage | In-kind items and services | $10.69 | General |
| Category: HEMATOLOGY | ||||||
| 04/24/2018 | Cerus Corporation | — | Food and Beverage | Cash or cash equivalent | $14.68 | General |
| Category: DEVICE-TRANSFUSION | ||||||
| 04/06/2018 | Beckman Coulter, Inc. | UNICEL DXI ACCESS (Device) | Food and Beverage | In-kind items and services | $13.87 | General |
| Category: IMMUNOASSAY | ||||||
| 04/28/2017 | Otsuka America Pharmaceutical, Inc. | BREATHTEK (Device) | Food and Beverage | In-kind items and services | $14.74 | General |
| Category: GASTROENTEROLOGY | ||||||
| 04/27/2017 | Merck Sharp & Dohme Corporation | ZERBAXA (Drug) | Food and Beverage | In-kind items and services | $11.29 | General |
| Category: INFECTIOUS DISEASE | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 11 | 764 | 1,373 | $251,525 | $40,985 |
| 2022 | 11 | 714 | 1,134 | $198,515 | $33,091 |
| 2021 | 14 | 833 | 1,422 | $254,565 | $44,862 |
| 2020 | 14 | 730 | 1,231 | $215,640 | $39,237 |
Total Patients
3,041
Total Services
5,160
Medicare Billing
$158,175
Procedure Codes
50
All Medicare Procedures & Services
50 procedure records from CMS Medicare Utilization — Page 1 of 2
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | Facility | 2023 | 279 | 642 | $147,660 | $20,186 | 13.7% |
| 88331 | Pathology examination of specimen during surgery, first tissue block | Facility | 2023 | 49 | 168 | $38,640 | $8,932 | 23.1% |
| 88342 | Special stained specimen slides to examine tissue, initial procedure | Facility | 2023 | 94 | 97 | $13,580 | $2,858 | 21.0% |
| 88307 | Pathology examination of tissue using a microscope, moderately high complexity | Facility | 2023 | 28 | 38 | $10,640 | $2,632 | 24.7% |
| 88341 | Special stained specimen slides to examine tissue, each additional procedure | Facility | 2023 | 19 | 75 | $6,000 | $1,811 | 30.2% |
| 88311 | Preparation of tissue for examination by removing any calcium present | Facility | 2023 | 98 | 125 | $6,250 | $1,308 | 20.9% |
| 85060 | Blood smear interpretation by physician with written report | Facility | 2023 | 42 | 44 | $4,180 | $908.16 | 21.7% |
| 88112 | Cell examination of specimen, selective cellular enhancement technique | Facility | 2023 | 31 | 35 | $8,050 | $822.50 | 10.2% |
| 89060 | Crystal identification from tissue or body fluid | Facility | 2023 | 41 | 49 | $4,695 | $745.08 | 15.9% |
| 88304 | Pathology examination of tissue using a microscope, moderately low complexity | Facility | 2023 | 54 | 69 | $9,660 | $666.54 | 6.9% |
| 88300 | Pathology examination of tissue using a microscope, limited examination | Facility | 2023 | 29 | 31 | $2,170 | $115.97 | 5.3% |
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | Facility | 2022 | 249 | 480 | $110,400 | $15,204 | 13.8% |
| 88331 | Pathology examination of specimen during surgery, first tissue block | Facility | 2022 | 35 | 97 | $22,310 | $5,177 | 23.2% |
| 88342 | Special stained specimen slides to examine tissue, initial procedure | Facility | 2022 | 127 | 137 | $19,180 | $4,002 | 20.9% |
| 88341 | Special stained specimen slides to examine tissue, each additional procedure | Facility | 2022 | 32 | 107 | $8,400 | $2,567 | 30.6% |
| 88307 | Pathology examination of tissue using a microscope, moderately high complexity | Facility | 2022 | 25 | 33 | $9,240 | $2,325 | 25.2% |
| 88311 | Preparation of tissue for examination by removing any calcium present | Facility | 2022 | 75 | 89 | $4,450 | $934.42 | 21.0% |
| 85060 | Blood smear interpretation by physician with written report | Facility | 2022 | 35 | 37 | $3,515 | $768.14 | 21.9% |
| 88112 | Cell examination of specimen, selective cellular enhancement technique | Facility | 2022 | 29 | 32 | $7,360 | $756.72 | 10.3% |
| 89060 | Crystal identification from tissue or body fluid | Facility | 2022 | 45 | 48 | $4,560 | $745.83 | 16.4% |
| 88304 | Pathology examination of tissue using a microscope, moderately low complexity | Facility | 2022 | 45 | 56 | $7,840 | $543.88 | 6.9% |
| 88300 | Pathology examination of tissue using a microscope, limited examination | Facility | 2022 | 17 | 18 | $1,260 | $68.10 | 5.4% |
| 88305 | Pathology examination of tissue using a microscope, intermediate complexity | Facility | 2021 | 280 | 590 | $135,700 | $19,432 | 14.3% |
| 88331 | Pathology examination of specimen during surgery, first tissue block | Facility | 2021 | 40 | 161 | $37,030 | $8,852 | 23.9% |
| 88342 | Special stained specimen slides to examine tissue, initial procedure | Facility | 2021 | 151 | 165 | $23,100 | $5,074 | 22.0% |
About Dr. Ann Tan, M.D
Dr. Ann Tan, M.D is a Anatomic Pathology & Clinical Pathology healthcare provider based in Los Angeles, California. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 06/23/2008. The National Provider Identifier (NPI) number assigned to this provider is 1093976938.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Ann Tan, M.D has received a total of $239.66 in payments from pharmaceutical and medical device companies, with $21.45 received in 2024. These payments were reported across 14 transactions from 7 companies. The most common payment nature is "Food and Beverage" ($239.66).
As a Medicare-enrolled provider, Tan has provided services to 3,041 Medicare beneficiaries, totaling 5,160 services with total Medicare billing of $158,175. Data is available for 4 years (2020–2023), covering 50 distinct procedure/service records.
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Practice Information
- Specialty Anatomic Pathology & Clinical Pathology
- Location Los Angeles, CA
- Active Since 06/23/2008
- Last Updated 06/23/2008
- Taxonomy Code 207ZP0102X
- Entity Type Individual
- NPI Number 1093976938
Products in Payments
- DIFICID (Drug) $44.93
- UNICEL DXH (Device) $33.91
- BREATHTEK (Device) $31.40
- Fetroja (Drug) $26.19
- OCTAPLAS (Biological) $19.11
- Ultomiris (Drug) $16.17
- UNICEL DXI ACCESS (Device) $13.87
- ZERBAXA (Drug) $11.29
- DXH 900 (Device) $10.87
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Data Sources
Provider data from NPPES. Payment data from CMS Open Payments. Medicare data from CMS Medicare Provider Utilization. All data is public and updated periodically.
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