Medicare Enrolled
Dr. Nathan Woolwine, M.D.
Nephrology · Concord, NC
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
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. Woolwine 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 →
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What this data tells you about Dr. Woolwine
Dr. Nathan Woolwine is a nephrology specialist in Concord, NC, with 21 years of NPI registration. Based on federal Medicare data, Dr. Woolwine performed 13,248 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Woolwine received a total of $950 from 15 pharmaceutical and/or device companies across 56 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Woolwine 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.
✓ 21 years of NPI registration
▲ Top 3% volume in NC
$950 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗13,248
Medicare services
Top 3% in NC for nephrology
Not available
Unique patients (not deduplicated)
$14
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
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 |
|---|---|---|---|
| Iron sucrose injection (Venofer) An injection of iron sucrose used to replenish iron levels in the body. |
7,000 | $0 | $1 |
| Epoetin alfa injection (Procrit) for anemia An injection of epoetin alfa containing 1000 units for use in patients not on end-stage renal disease (ESRD) dialysis. |
1,050 | $6 | $25 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
596 | $8 | $20 |
| Kidney function blood test panel | 561 | $8 | $35 |
| 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. |
418 | $40 | $125 |
| 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. |
385 | $60 | $244 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
301 | $5 | $40 |
| Urine total protein level A laboratory test that measures the total amount of protein present in a urine sample. |
298 | $4 | $11 |
| Complete blood count (CBC), automated An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood. |
294 | $6 | $20 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
293 | $29 | $60 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
292 | $7 | $29 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
265 | $60 | $172 |
| Urinalysis with microscopic exam A urine test performed manually that includes examining the sample under a microscope to check for abnormalities. |
207 | $3 | $25 |
| 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. |
191 | $8 | $35 |
| Dialysis services for patients 20 or older Dialysis treatment provided to patients aged 20 years or older, involving four or more physician visits per month. |
156 | $276 | $1,035 |
| Home dialysis services per month Monthly dialysis treatment provided in the patient's home for individuals aged 20 or older. |
123 | $229 | $800 |
| Hemoglobin blood test A blood test that measures the amount of hemoglobin, the protein in red blood cells that carries oxygen. |
79 | $2 | $10 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
77 | $13 | $44 |
| Iron level test | 77 | $6 | $25 |
| Transferrin level test A blood test that measures the amount of transferrin, a protein that binds to and transports iron in the body. |
77 | $12 | $56 |
| Initial hospital admission, moderate complexity Initial hospital inpatient or observation care for a new patient involving moderate-level medical decision making, with at least 55 minutes total time on the date of the encounter. |
60 | $99 | $398 |
| Tacrolimus level test A blood test to measure the amount of tacrolimus in your system. This helps ensure the medication is at a safe and effective level. |
59 | $13 | $80 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
54 | $10 | $53 |
| Hemodialysis, single evaluation A dialysis procedure to filter waste from the blood, performed with a physician's evaluation. |
53 | $54 | $390 |
| Complement and antigen measurement A laboratory test to measure levels of complement proteins and antigens in the blood. |
47 | $12 | $38 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
42 | $79 | $329 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
37 | $5 | $47 |
| Intravenous drug injection A procedure involving the administration of a medication or substance directly into a vein. |
36 | $28 | $130 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
28 | $10 | $30 |
| Phosphate level test A blood test that measures the amount of phosphate in your body. Phosphate is a mineral that helps keep bones and teeth strong. |
27 | $5 | $16 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
24 | $116 | $377 |
| Dialysis services for adults, 2-3 visits per month This code covers dialysis services for patients aged 20 or older who have 2 to 3 physician visits per month. |
16 | $233 | $900 |
| Initial hospital admission, low complexity Initial hospital inpatient or observation care for a new patient involving straightforward or low-level medical decision making, with at least 40 minutes total time on the date of the encounter. |
13 | $62 | $278 |
| Blood potassium level test A blood test that measures the amount of potassium in your body. Potassium is an electrolyte that helps control heart and muscle function. |
12 | $5 | $10 |
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. These counts do not measure clinical quality or years of experience.
Industry Payment Transparency
Open Payments through 2024 ↗$950
Total received (2018-2024)
Avg $136/year across 7 years
Bottom 43% in NC for nephrology
15
Companies
56
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$79
2023
$73
2022
$46
2021
$13
2020
$87
2019
$269
2018
$382
Payments by company (2024)
Novartis Pharmaceuticals Corporation
$32
AKEBIA THERAPEUTICS INC
$25
CALLIDITAS THERAPEUTICS US INC.
$22
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
AKEBIA THERAPEUTICS INC
$163
Amgen Inc.
$153
AstraZeneca Pharmaceuticals LP
$115
Keryx Biopharmaceuticals, Inc.
$97
Fresenius USA Marketing, Inc.
$73
OPKO Pharmaceuticals, LLC
$65
Mallinckrodt LLC
$65
Novartis Pharmaceuticals Corporation
$47
Horizon Pharma plc
$39
Otsuka America Pharmaceutical, Inc.
$34
Alexion Pharmaceuticals, Inc.
$30
CALLIDITAS THERAPEUTICS US INC.
$22
Exeltis, USA Inc.
$19
Daiichi Sankyo Inc.
$15
Relypsa, Inc.
$13
Top 3 companies account for 45.4% of all-time payments
Associated products mentioned in payments ›
ACTHAR · AURYXIA · Auryxia · Fabhalta · INJECTAFER · KRYSTEXXA · LOKELMA · PURIFIED CORTROPHIN GEL · Parsabiv · Rayaldee · SAMSCA · SOLIRIS · TARPEYO · Vafseo · Velphoro · Veltassa
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. 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 →
Geographic Context
Nephrologists in nearby ZIP areas
29
County median income
$86,084
Nearest hospital to ZIP centroid (approximate)
CAROLINAS MEDICAL CENTER-NORTHEAST
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | 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. Woolwine is a mixed practice specialist, with above-average Medicare volume (top 3% in NC), with 21 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. Woolwine experienced with iron sucrose injection (venofer)?
Based on Medicare claims data, Dr. Woolwine performed 7,000 iron sucrose injection (venofer) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Woolwine receive payments from pharmaceutical companies?
Yes. Dr. Woolwine received a total of $950 from 15 companies across 56 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. 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. Woolwine's costs compare to other nephrologists in Concord?
Dr. Woolwine's average Medicare payment per service is $14. 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. Woolwine) 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 the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. 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?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: 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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