Medicare Enrolled
Dr. Joanna Davies, M.D.
Rheumatology · Los Angeles, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Davies from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
Are you Dr. Davies?
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What this data tells you about Dr. Davies
Dr. Joanna Davies is a rheumatology specialist in Los Angeles, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Davies performed 1,236 Medicare services across 1,127 unique beneficiaries.
Between the years covered by Open Payments, Dr. Davies received a total of $9,780 from 42 pharmaceutical and/or device companies across 557 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in rheumatology. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Davies is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years in practice
▲ Top 44% volume in CA
$9,780 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,236
Medicare services
Top 44% in CA for rheumatology
1,127
Unique beneficiaries
$22
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~62 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
137 | $63 | $160 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
93 | $8 | $12 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
77 | $8 | $28 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
64 | $16 | $35 |
| Erythrocyte sedimentation rate (ESR) test A blood test that measures how quickly red blood cells settle in a test tube to detect inflammation in the body. This specific method is performed manually rather than using an automated machine. |
64 | $4 | $20 |
| Iron level test | 62 | $6 | $20 |
| Iron binding capacity test A blood test that measures the amount of iron in the blood and the blood's ability to bind and transport iron. |
60 | $9 | $20 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
58 | $13 | $42 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
51 | $13 | $49 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
47 | $9 | $20 |
| Free T3 thyroid hormone test A blood test that measures the level of free triiodothyronine (T3) hormone in your body. This helps assess how well your thyroid gland is functioning. |
46 | $17 | $35 |
| Uric acid level test A blood test that measures the level of uric acid in your body. Uric acid is a waste product formed when the body breaks down purines. |
46 | $4 | $20 |
| Bone density scan (DEXA) A test that uses low-dose X-rays to measure bone mineral density in the hip, pelvis, and spine. It helps assess bone strength and risk of fractures. |
43 | $44 | $145 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
43 | $7 | $99 |
| Chest X-ray, 2 views An X-ray imaging test of the chest that captures two different angles to visualize the lungs, heart, and chest wall. |
40 | $21 | $99 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
38 | $26 | $85 |
| Limited retroperitoneal ultrasound A focused ultrasound exam of the area behind the abdominal cavity to evaluate specific structures. |
37 | $35 | $165 |
| Ultrasound of arm and leg arteries This procedure uses sound waves to create images of the blood vessels in the arms and legs. It allows healthcare providers to examine the structure and blood flow within these arteries. |
37 | $72 | $180 |
| High-sensitivity C-reactive protein test A blood test that measures high-sensitivity C-reactive protein to detect infection or inflammation. |
35 | $13 | $60 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
33 | $10 | $45 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
24 | $7 | $20 |
| Telehealth consultation, emergency department or initial inpatient, typically 30 minutes communicating with the patient via telehealth | 24 | $56 | $110 |
| Glutamyltransferase (GGT) level test A blood test that measures the level of the liver enzyme glutamyltransferase (GGT) to help evaluate liver health. |
23 | $7 | $23 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
21 | $61 | $110 |
| Urinalysis, manual A manual laboratory examination of a urine sample to check for various substances and cells. |
20 | $3 | $23 |
| Parathyroid hormone level test A blood test that measures the amount of parathyroid hormone in your body. This hormone helps regulate calcium levels in the blood and bones. |
13 | $40 | $75 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
Industry Payment Transparency
Open Payments through 2024 ↗$9,780
Total received (2018-2024)
Avg $1,397/year across 7 years
Top 29% in CA for rheumatology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
42
Companies
557
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$9,780 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$151
2023
$811
2022
$2,441
2021
$2,724
2020
$1,521
2019
$1,225
2018
$906
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Novo Nordisk Inc
$111
Insulet Corporation
$40
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
Amgen Inc.
$1,823
Lilly USA, LLC
$1,344
Novo Nordisk Inc
$1,025
Janssen Biotech, Inc.
$621
GlaxoSmithKline, LLC.
$397
Bayer HealthCare Pharmaceuticals Inc.
$374
ABBVIE INC.
$372
AbbVie Inc.
$344
Zealand Pharma US, Inc.
$340
Insulet Corporation
$320
Mallinckrodt Hospital Products Inc.
$307
Boehringer Ingelheim Pharmaceuticals, Inc.
$307
Xeris Pharmaceuticals, Inc.
$171
Alexion Pharmaceuticals, Inc.
$163
Mannkind Corporation
$142
AstraZeneca Pharmaceuticals LP
$141
Radius Health, Inc.
$131
E.R. Squibb & Sons, L.L.C.
$129
Mallinckrodt Enterprises LLC
$129
MannKind Corporation
$119
Corcept Therapeutics
$108
Horizon Therapeutics plc
$95
PFIZER INC.
$89
Amarin Pharma Inc.
$87
Merck Sharp & Dohme Corporation
$83
Abbott Laboratories
$78
Dexcom, Inc.
$77
IBSA Pharma Inc.
$74
Takeda Pharmaceuticals U.S.A., Inc.
$59
Becton, Dickinson and Company
$50
Novartis Pharmaceuticals Corporation
$41
Alvogen Inc
$28
Esperion Therapeutics, Inc.
$27
Fresenius Kabi USA, LLC
$27
AbbVie, Inc.
$24
Janssen Pharmaceuticals, Inc
$24
SANOFI-AVENTIS U.S. LLC
$20
Exact Sciences Corporation
$19
Bayer Healthcare Pharmaceuticals Inc.
$18
Mallinckrodt LLC
$18
DERMIRA, INC.
$17
Merck Sharp & Dohme LLC
$17
Top 3 companies account for 42.8% of all-time payments
Associated products mentioned in payments ›
ACTHAR · AFREZZA · AVSOLA · Aimovig · BAQSIMI · BD NANO · BD Nano · BENLYSTA · COLOGUARD · COLOGUARD DNA CAPTURE REAGENTS · COSENTYX · Cologuard Collection Kit · Dexcom G6 Transmitter · EVENITY · Enbrel · FARXIGA · FORTEO · FREESTYLE LIBRE · FreeStyle Libre · FreeStyle Libre 2 · GVOKE HYPOPEN · GVOKE PFS · HUMALOG · HUMIRA · HUMULIN · INVOKANA · JANUVIA · JARDIANCE · Kerendia · Korlym · MOUNJARO · NEXLETOL · OFEV · ORENCIA · Omnipod · Otezla · Ozempic · PENNSAID · PNEUMOVAX 23 · PREVNAR - 13 · Prolia · QBREXZA · QULIPTA · RAYOS · REMICADE · RINVOQ · RYBELSUS · Repatha · Rinvoq · Rybelsus · SAPHNELO · SHINGRIX · SIMPONI · SIMPONI ARIA · SKYRIZI · STEGLATRO · STELARA · STRENSIQ · SYNTHROID · Saxenda · Strensiq · TALTZ · TERIPARATIDE · TOUJEO · TREMFYA · TRULICITY · Tirosint · Tresiba · Tymlos · UBRELVY · V-GO · V-GO DISPOSABLE INSULIN DELIVERY · Vascepa · Wegovy · ZEGALOGUE · ZYPREXA
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Rheumatologists within 10 mi
213
Per 100K population
2.2
County median income
$87,760
Nearest hospital
PIH HEALTH GOOD SAMARITAN HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Davies is a clinical cardiology specialist, with moderate Medicare volume, with low-engagement industry engagement, with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Davies experienced with office visit, established patient (30-39 min)?
Based on Medicare claims data, Dr. Davies performed 137 office visit, established patient (30-39 min) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Davies receive payments from pharmaceutical companies?
Yes. Dr. Davies received a total of $9,780 from 42 companies across 557 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Davies's costs compare to other rheumatologists in Los Angeles?
Dr. Davies's average Medicare payment per service is $22. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Davies) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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