Total Payments
$1,204
2024 Payments
$111.78
Companies
22
Transactions
70
Medicare Patients
20,370
Medicare Billing
$1.5M
Payment Breakdown by Category
Food & Beverage$1,108 (92.0%)
Education$95.88 (8.0%)
Payments by Nature
| Nature of Payment | Amount | Transactions | Share |
|---|---|---|---|
| Food and Beverage | $1,108 | 68 | 92.0% |
| Education | $95.88 | 2 | 8.0% |
Top Paying Companies
| Company | Total | Records | Latest Year |
|---|---|---|---|
| AstraZeneca Pharmaceuticals LP | $272.62 | 17 | $0 (2024) |
| Otsuka America Pharmaceutical, Inc. | $221.51 | 8 | $0 (2024) |
| Relypsa, Inc. | $92.00 | 6 | $0 (2020) |
| Aurinia Pharma U.S., Inc. | $88.66 | 5 | $0 (2023) |
| Janssen Pharmaceuticals, Inc | $81.42 | 5 | $0 (2019) |
| Amgen Inc. | $62.51 | 4 | $0 (2022) |
| GlaxoSmithKline, LLC. | $53.98 | 3 | $0 (2023) |
| Mallinckrodt LLC | $51.47 | 3 | $0 (2018) |
| Genentech USA, Inc. | $45.37 | 3 | $0 (2019) |
| Lilly USA, LLC | $39.23 | 2 | $0 (2024) |
Payment History by Year
| Year | Amount | Transactions | Top Company |
|---|---|---|---|
| 2024 | $111.78 | 7 | Lilly USA, LLC ($39.23) |
| 2023 | $127.71 | 8 | AstraZeneca Pharmaceuticals LP ($60.27) |
| 2022 | $170.88 | 10 | Aurinia Pharma U.S., Inc. ($58.50) |
| 2021 | $196.17 | 7 | Otsuka America Pharmaceutical, Inc. ($112.09) |
| 2020 | $122.95 | 8 | AstraZeneca Pharmaceuticals LP ($76.58) |
| 2019 | $267.24 | 18 | AstraZeneca Pharmaceuticals LP ($67.59) |
| 2018 | $152.48 | 9 | Mallinckrodt LLC ($51.47) |
| 2017 | $54.32 | 3 | Novartis Pharmaceuticals Corporation ($23.33) |
All Payment Transactions
70 individual payment records from CMS Open Payments — Page 3 of 3
| Date | Company | Product | Nature | Form | Amount | Type |
|---|---|---|---|---|---|---|
| 08/26/2019 | Genentech USA, Inc. | Rituxan (Biological) | Food and Beverage | In-kind items and services | $15.98 | General |
| Category: BioOncology/Immunology | ||||||
| 08/06/2019 | Janssen Pharmaceuticals, Inc | INVOKANA (Drug), INVOKAMET | Food and Beverage | In-kind items and services | $16.92 | General |
| Category: Cardiovascular & Metabolism | ||||||
| 07/16/2019 | AstraZeneca Pharmaceuticals LP | LOKELMA (Drug) | Food and Beverage | In-kind items and services | $11.35 | General |
| Category: Cardiovascular and Metabolism | ||||||
| 07/01/2019 | Janssen Pharmaceuticals, Inc | INVOKANA (Drug), INVOKAMET | Food and Beverage | In-kind items and services | $15.03 | General |
| Category: Cardiovascular & Metabolism | ||||||
| 06/27/2019 | Relypsa, Inc. | Veltassa (Drug) | Food and Beverage | In-kind items and services | $14.69 | General |
| Category: Hyperkalemia | ||||||
| 05/09/2019 | AstraZeneca Pharmaceuticals LP | LOKELMA (Drug) | Food and Beverage | In-kind items and services | $12.06 | General |
| Category: Cardiovascular and Metabolism | ||||||
| 05/08/2019 | OPKO Pharmaceuticals, LLC | Rayaldee (Drug) | Food and Beverage | In-kind items and services | $12.97 | General |
| Category: Hyperparathyroidism | ||||||
| 01/03/2019 | Relypsa, Inc. | Veltassa (Drug) | Food and Beverage | In-kind items and services | $11.65 | General |
| Category: Hyperkalemia | ||||||
| 11/08/2018 | Genentech USA, Inc. | Rituxan (Biological) | Food and Beverage | In-kind items and services | $14.61 | General |
| Category: BioOncology/Immunology | ||||||
| 10/24/2018 | Janssen Pharmaceuticals, Inc | XARELTO (Drug) | Food and Beverage | In-kind items and services | $23.94 | General |
| Category: Cardiovascular & Metabolism | ||||||
| 09/20/2018 | AstraZeneca Pharmaceuticals LP | BRILINTA (Drug) | Food and Beverage | In-kind items and services | $16.54 | General |
| Category: Cardiovascular and Metabolism | ||||||
| 08/30/2018 | Keryx Biopharmaceuticals, Inc. | Auryxia (Drug) | Food and Beverage | In-kind items and services | $20.35 | General |
| Category: Nephrology | ||||||
| 08/29/2018 | ARBOR PHARMACEUTICALS, INC. | Edarbi (Drug) | Food and Beverage | In-kind items and services | $10.79 | General |
| Category: Cardiology/Vascular Diseases | ||||||
| 07/09/2018 | Genentech USA, Inc. | Rituxan (Biological) | Food and Beverage | In-kind items and services | $14.78 | General |
| Category: BioOncology/Immunology | ||||||
| 03/27/2018 | Mallinckrodt LLC | ACTHAR (Biological) | Food and Beverage | In-kind items and services | $23.07 | General |
| Category: AUTOIMMUNE AND RARE DISEASE | ||||||
| 03/05/2018 | Mallinckrodt LLC | ACTHAR (Biological) | Food and Beverage | In-kind items and services | $13.80 | General |
| Category: AUTOIMMUNE AND RARE DISEASE | ||||||
| 01/29/2018 | Mallinckrodt LLC | ACTHAR (Biological) | Food and Beverage | In-kind items and services | $14.60 | General |
| Category: AUTOIMMUNE AND RARE DISEASE | ||||||
| 10/03/2017 | Janssen Pharmaceuticals, Inc | XARELTO (Drug) | Food and Beverage | In-kind items and services | $12.81 | General |
| Category: Cardiovascular & Metabolism | ||||||
| 09/19/2017 | Amgen Inc. | Parsabiv (Biological), Sensipar | Food and Beverage | In-kind items and services | $18.18 | General |
| Category: Nephrology | ||||||
| 01/19/2017 | Novartis Pharmaceuticals Corporation | ENTRESTO (Drug) | Food and Beverage | In-kind items and services | $23.33 | General |
| Category: CARDIOVASCULAR | ||||||
Medicare Billing by Year
| Year | Procedures | Beneficiaries | Services | Submitted | Medicare Paid |
|---|---|---|---|---|---|
| 2023 | 36 | 4,412 | 7,009 | $2.7M | $366,841 |
| 2022 | 35 | 4,127 | 6,845 | $1.1M | $327,131 |
| 2021 | 40 | 5,743 | 9,152 | $1.4M | $408,177 |
| 2020 | 42 | 6,088 | 9,957 | $1.6M | $416,000 |
Total Patients
20,370
Total Services
32,963
Medicare Billing
$1.5M
Procedure Codes
153
All Medicare Procedures & Services
153 procedure records from CMS Medicare Utilization — Page 1 of 7
| HCPCS | Description | Setting | Year | Patients | Services | Charges | Medicare Paid | Ratio |
|---|---|---|---|---|---|---|---|---|
| 90960 | Dialysis services, 4 or more physician visits per month (20 years or older) | Office | 2023 | 52 | 365 | $715,254 | $95,842 | 13.4% |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Facility | 2023 | 245 | 712 | $470,817 | $63,221 | 13.4% |
| 93975 | Complete ultrasound of abdomen and pelvis artery and vein blood flow | Office | 2023 | 323 | 327 | $467,309 | $58,941 | 12.6% |
| 76770 | Complete ultrasound scan behind abdominal cavity | Office | 2023 | 401 | 412 | $243,072 | $32,132 | 13.2% |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | Office | 2023 | 236 | 366 | $256,954 | $29,862 | 11.6% |
| 83970 | Parathormone (parathyroid hormone) level | Office | 2023 | 159 | 202 | $50,031 | $8,135 | 16.3% |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Facility | 2023 | 67 | 68 | $65,549 | $8,122 | 12.4% |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | Facility | 2023 | 67 | 69 | $49,750 | $6,819 | 13.7% |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Facility | 2023 | 61 | 113 | $49,657 | $6,416 | 12.9% |
| 90935 | Hemodialysis procedure with physician evaluation | Facility | 2023 | 46 | 91 | $36,205 | $4,908 | 13.6% |
| 82306 | Vitamin d-3 level | Office | 2023 | 136 | 168 | $29,837 | $4,848 | 16.2% |
| 99490 | Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month | Office | 2023 | 26 | 97 | $33,354 | $4,382 | 13.1% |
| 80053 | Blood test, comprehensive group of blood chemicals | Office | 2023 | 238 | 405 | $25,661 | $4,174 | 16.3% |
| 82610 | Cystatin c (enzyme inhibitor) level | Office | 2023 | 169 | 224 | $24,891 | $4,066 | 16.3% |
| 99457 | Management using the results of remote vital sign monitoring per calendar month, first 20 minutes | Office | 2023 | 28 | 109 | $28,907 | $3,776 | 13.1% |
| 36415 | Insertion of needle into vein for collection of blood sample | Office | 2023 | 251 | 423 | $7,599 | $3,548 | 46.7% |
| 85025 | Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | Office | 2023 | 246 | 394 | $18,368 | $2,992 | 16.3% |
| G0444 | Annual depression screening, 5 to 15 minutes | Office | 2023 | 164 | 164 | $16,452 | $2,757 | 16.8% |
| 99454 | Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days | Office | 2023 | 20 | 76 | $19,891 | $2,570 | 12.9% |
| 82043 | Urine microalbumin (protein) level | Office | 2023 | 253 | 400 | $11,895 | $2,259 | 19.0% |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | Office | 2023 | 19 | 19 | $17,358 | $2,254 | 13.0% |
| 82570 | Creatinine level to test for kidney function or muscle injury | Office | 2023 | 242 | 382 | $11,873 | $1,936 | 16.3% |
| 93976 | Ultrasound of abdomen and pelvis artery and vein blood flow | Office | 2023 | 17 | 18 | $14,139 | $1,797 | 12.7% |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | Office | 2023 | 11 | 14 | $13,799 | $1,756 | 12.7% |
| 84100 | Phosphate level | Office | 2023 | 229 | 368 | $10,466 | $1,707 | 16.3% |
About Dr. Nathan Chamberlain, M.D
Dr. Nathan Chamberlain, M.D is a Nephrology healthcare provider based in Chattanooga, Tennessee. This provider has been registered with the National Plan and Provider Enumeration System (NPPES) since 07/05/2005. The National Provider Identifier (NPI) number assigned to this provider is 1134126246.
According to the Centers for Medicare & Medicaid Services (CMS) Open Payments database, Dr. Nathan Chamberlain, M.D has received a total of $1,204 in payments from pharmaceutical and medical device companies, with $111.78 received in 2024. These payments were reported across 70 transactions from 22 companies. The most common payment nature is "Food and Beverage" ($1,108).
As a Medicare-enrolled provider, Chamberlain has provided services to 20,370 Medicare beneficiaries, totaling 32,963 services with total Medicare billing of $1.5M. Data is available for 4 years (2020–2023), covering 153 distinct procedure/service records.
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Practice Information
- Specialty Nephrology
- Other Specialties Nephrology
- Location Chattanooga, TN
- Active Since 07/05/2005
- Last Updated 05/28/2010
- Taxonomy Code 207RN0300X
- Entity Type Individual
- NPI Number 1134126246
Products in Payments
- JYNARQUE (Drug) $221.51
- LOKELMA (Drug) $172.10
- Veltassa (Drug) $92.00
- LUPKYNIS (Drug) $88.66
- FARXIGA (Drug) $83.98
- ACTHAR (Biological) $66.08
- BENLYSTA (Biological) $53.98
- XARELTO (Drug) $49.47
- Rituxan (Biological) $45.37
- Auryxia (Drug) $40.39
- JARDIANCE (Drug) $39.23
- Parsabiv (Biological) $35.45
- INVOKANA (Drug) $31.95
- ENTRESTO (Drug) $23.33
- AURYXIA (Drug) $19.00
- BRILINTA (Drug) $16.54
- ULTOMIRIS (Drug) $14.71
- KRYSTEXXA (Biological) $14.31
- Parsabiv (Drug) $14.09
- Rayaldee (Drug) $12.97
Explore
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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