Medicare Enrolled
Manuel Sierra Ascencio
Internal Medicine · Marysville, WA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
High
DATA COVERAGE
Data in 3 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Sierra Ascencio 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 Sierra Ascencio
Manuel Sierra Ascencio is an internal medicine specialist in Marysville, WA, with 17 years of NPI registration. Based on federal Medicare data, Sierra Ascencio performed 2,328 Medicare services in 2023. These records do not provide a deduplicated patient total.
The Data Coverage level for Sierra Ascencio is 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.
✓ 17 years of NPI registration
▲ Top 6% volume in WA
Medicare Practice Summary — 2023
Medicare Utilization ↗2,328
Medicare services
Top 6% in WA for internal medicine
Not available
Unique patients (not deduplicated)
$22
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 |
|---|---|---|---|
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
232 | $8 | $14 |
| 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. |
171 | $78 | $309 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
129 | $13 | $33 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
128 | $16 | $38 |
| Red blood cell concentration measurement A laboratory test that measures the concentration of red blood cells in the blood. |
128 | $2 | $6 |
| Hemoglobin blood test A blood test that measures the amount of hemoglobin, the protein in red blood cells that carries oxygen. |
128 | $2 | $6 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
115 | $9 | $22 |
| Blood sodium level test A laboratory test that measures the amount of sodium in your blood. Sodium is an electrolyte that helps regulate fluid balance and nerve function. |
101 | $5 | $11 |
| Blood creatinine level test A blood test that measures the amount of creatinine, a waste product from muscle wear and tear, to help assess kidney function. |
100 | $5 | $12 |
| 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. |
100 | $5 | $10 |
| Liver function blood test panel | 92 | $8 | $17 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
81 | $8 | $18 |
| Automated platelet count test A laboratory test that uses a machine to count the number of platelets in a blood sample. Platelets are blood cells that help the body form clots to stop bleeding. |
75 | $4 | $10 |
| Office visit for established patient An office visit for an existing patient that may not require the healthcare professional to be present. |
71 | $17 | $66 |
| Total calcium level test A blood test that measures the total amount of calcium in your body. |
67 | $5 | $12 |
| Liver enzyme (SGPT) level test A blood test that measures the level of the liver enzyme SGPT to assess liver function. |
62 | $5 | $12 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
59 | $131 | $314 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
49 | $15 | $34 |
| 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 | $116 | $431 |
| 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. |
40 | $8 | $18 |
| PSA test (prostate cancer screening) A blood test that measures the level of prostate-specific antigen to screen for prostate cancer. |
34 | $18 | $41 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
31 | $12 | $30 |
| Iron level test | 31 | $6 | $14 |
| Transferrin level test A blood test that measures the amount of transferrin, a protein that binds to and transports iron in the body. |
31 | $11 | $28 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
27 | $7 | $15 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
27 | $9 | $20 |
| Urine microalbumin test (kidney screening) A laboratory test that measures the amount of microalbumin, a small protein, in a urine sample. This test is used to detect early signs of kidney damage. |
26 | $6 | $13 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
26 | $5 | $12 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
18 | $31 | $63 |
| Hepatitis B vaccine, adult, CPG-adjuvanted An adult dose of the Hepatitis B vaccine administered via intramuscular injection. It uses a CPG-adjuvanted formulation and follows a 2-dose or 4-dose schedule. |
16 | $153 | $320 |
| Hepatitis B vaccine administration This procedure involves the injection of the hepatitis B vaccine to provide immunization against the hepatitis B virus. |
16 | $31 | $63 |
| 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. |
15 | $49 | $218 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
14 | $14 | $33 |
| Flu vaccine, high-dose High-dose seasonal influenza vaccine for adults aged 65 and older. Contains four times the antigen of standard-dose flu vaccines (60 mcg per strain), split-virus formulation, preservative-free, single-dose syringe. |
13 | $72 | $154 |
| Urine culture, bacterial colony count A laboratory test that measures the number of bacteria growing in a urine sample to help identify infections. |
11 | $8 | $18 |
| Pneumococcal conjugate vaccine (PCV20) An intramuscular injection of the 20-valent pneumococcal conjugate vaccine. It is used to protect against diseases caused by Streptococcus pneumoniae bacteria. |
11 | $280 | $698 |
| Pneumonia vaccine administration This procedure involves the injection of a vaccine to protect against pneumococcal disease. It is administered by a healthcare provider. |
11 | $31 | $63 |
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.
Geographic Context
Internal medicine physicians in nearby ZIP areas
484
County median income
$107,982
Nearest hospital to ZIP centroid (approximate)
PROVIDENCE REGIONAL MEDICAL CENTER EVERETT
4.7 mi
4.7 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 | — No payments | N/A |
| Disciplinary History | — Not included | N/A |
This provider has data in 3 of 4 available federal datasets, with a Data Coverage level of High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Sierra Ascencio is a mixed practice specialist, with above-average Medicare volume (top 6% in WA), with 17 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Sierra Ascencio experienced with blood draw (venipuncture)?
Based on Medicare claims data, Sierra Ascencio performed 232 blood draw (venipuncture) services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
How do Sierra Ascencio's costs compare to other internal medicine physicians in Marysville?
Sierra Ascencio'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 High for Sierra Ascencio) 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 ↗, 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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