MARK L VILLALON MD
NPI 1720249816
Internal Medicine - Interventional Cardiology in Napa, CA

Q: What is Mark Villalon's NPI number?

The NPI number for Mark Villalon is 1720249816. It was assigned to this individual provider in the NPPES registry on June 20, 2008.

Q: What is Mark Villalon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.

Q: When was this NPI record last updated?

The NPPES record for Mark Villalon was last updated on July 12, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 20, 2008PECOS EnrolledAccepts Medicare Assignment

3443 VILLA LN, SUITE 2, NAPA, CA 94558(707) 253-8280 Get Directions Write a Review

NPPES record last updated: July 12, 2016. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Mark L Villalon Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK L VILLALON MD (NPI 1720249816) is an individual interventional cardiology provider in Napa, California, licensed in California (A129668) and active in the NPI registry since June 2008. He is enrolled in Medicare PECOS and is a graduate of Other (2008).

NPPES Registry Identity

NPI1720249816

Entity TypeIndividualMale

Primary Taxonomy207RI0011X

Provider Legal NameMARK L VILLALONCredential: MD

Location Address3443 VILLA LN, SUITE 2Napa, CA 94558-6417

Mailing Address3443 Villa Ln, Suite 2Napa, CA 94558-6417 · (707) 253-8280

Phone(707) 253-8280

Sole ProprietorNo

Medical School CMSOtherGraduated 2008

Enumeration DateJune 20, 2008

Last NPPES UpdateJuly 12, 2016

✔ NPI 1720249816 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Interventional CardiologyAllopathic & Osteopathic Physicians

Taxonomy Code207RI0011X

License✔ Licensed in CA · A129668

Definition

An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.

Also ListedInternal MedicineTaxonomy 207R00000X · License 256817 (MA)

3443 VILLA LN, Napa, CA 94558

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Other Identifiers 2

Medicaid110094017AMA

Medicare PIN003465401MA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mark L Villalon Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4880828813

PECOS Enrollment IDI20160727002263

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Mark Villalon reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Northbay Health Medical Foundation

11 mi

Internal Medicine

4500 BUSINESS CENTER DR
Fairfield, CA 94534

Reassigned Medicare billing, California enrollment
225 clinicians in this Medicare group

NPI 1760283527 (707) 646-3110

Northbay Healthcare Group

14 mi

Addiction Medicine

1860 PENNSYLVANIA AVE STE 230
Fairfield, CA 94533

Reassigned Medicare billing, California enrollment
Medicare enrollment name: Northbay Physicians Surgery Center, LLC
516 clinicians in this Medicare group

NPI 1780736736 (707) 646-4370

Regents Of The Univ Of Ca

31 mi

Medical Microbiology

3146 TUPPER HALL
Davis, CA 95616

Reassigned Medicare billing, California enrollment
2,570 clinicians in this Medicare group

NPI 1053304071 (530) 752-9402

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 32

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

886 services470 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

254 services233 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

249 services240 patients

Evaluation of implantable heart and blood vessel monitoring system, remote up to 30 days 93297

This service involves remotely monitoring your heart and blood vessel implant system for up to 30 days. Using advanced technology, healthcare professionals can track the device's performance and your health status, ensuring the system is working optimally for your needs.

240 services45 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

155 services106 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

116 services87 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

79 services75 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days 93296

This procedure involves remotely monitoring your pacemaker or implantable defibrillator system. Over a 90-day period, we check the device's performance and your heart's activity. This helps ensure the device is functioning properly and providing the best possible support for your heart health.

77 services37 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

74 services71 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days 93294

This procedure evaluates your pacemaker system remotely for up to 90 days. It checks whether single, dual, multiple lead, or leadless pacemakers are working properly. It's a safe, convenient way to ensure your heart device is functioning optimally.

53 services28 patients

Injection, regadenoson, 0.1 mg J2785

Regadenoson injection, 0.1 mg, is a medication used to help visualize the heart during a stress test. It works by increasing blood flow in the arteries of the heart. It's injected into a vein and is generally well-tolerated.

52 services13 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

48 services44 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

48 services48 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

40 services40 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

40 services31 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

35 services35 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

33 services33 patients

Insertion of tube in coronary artery for diagnosis with review by radiologist 93454

This procedure involves placing a small tube into your coronary artery. It helps to identify any blockages or issues within the artery. A radiologist, a doctor specialized in medical imaging, will review the results to ensure accurate diagnosis.

33 services33 patients

Ultrasound evaluation of heart blood vessel or graft with review by radiologist, initial vessel 92978

This procedure involves using ultrasound technology to examine the first vessel of your heart or graft. A radiologist will review the images. It's a non-invasive way to check the health of your heart's blood vessels.

31 services29 patients

Ultrasound of heart with continuous electrocardiogram (ecg) during rest, exercise and/or drug induced stress with review and report 93351

This procedure involves using ultrasound technology to create images of your heart while you rest, exercise, or undergo drug-induced stress. An ECG continuously monitors your heart's electrical activity. It helps doctors assess heart health and function.

26 services26 patients

Technetium tc-99m sestamibi, diagnostic, per study dose A9500

Technetium Tc-99m Sestamibi is a diagnostic test used to create images of your heart or breast tissues. It involves a safe radioactive substance injection that helps doctors to detect any abnormalities or changes in these tissues.

26 services13 patients

Insertion of tube in left lower heart chamber and coronary artery for diagnosis with review by radiologist 93458

This procedure involves placing a tube into your left lower heart chamber and coronary artery. It helps doctors diagnose heart conditions by allowing them to view these areas in detail. A radiologist will review the images to ensure accurate diagnosis.

23 services23 patients

Ultrasound evaluation of heart blood vessel during diagnosis or treatment, initial vessel 93571

This procedure involves using ultrasound technology to examine the first blood vessel of your heart. It helps identify any abnormalities or issues, providing crucial information for diagnosis or treatment. It's a safe, non-invasive process.

22 services21 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician 93015

An exercise or drug-induced heart stress test with ECG is a procedure performed by a doctor to assess how your heart responds to exertion. It involves monitoring your heart's electrical activity while you exercise or after medication is given to mimic exercise effects.

21 services21 patients

Ultrasound of heart with probe in esophagus, with report 93312

This procedure, called a transesophageal echocardiogram, uses a small probe passed into your esophagus to capture detailed images of your heart. The report provides information about your heart's structure and function.

20 services18 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

19 services16 patients

Insertion of stents with balloon dilation of coronary artery or branch, single artery or branch 92928

This procedure involves placing a small, mesh tube (stent) in your coronary artery to keep it open. A balloon is used to expand the stent and artery, improving blood flow to your heart. It's typically done for a single artery or branch.

16 services13 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

15 services15 patients

Electrocardiogram (ecg) up to 30 days continuous with review and report by health care professional 93228

An Electrocardiogram (ECG) is a non-invasive test that records the electrical signals in your heart. For up to 30 days, a small device will continuously monitor your heart's activity. A healthcare professional will then review the data and provide a report on your heart's function.

13 services12 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

13 services12 patients

Replacement of aortic valve through the skin and femoral artery 33361

This procedure, known as Transcatheter Aortic Valve Replacement (TAVR), involves replacing a damaged aortic valve through a small incision in the leg. A catheter is inserted into the femoral artery and guided up to the heart. The new valve is then positioned and deployed, restoring normal blood flow.

11 services11 patients

Removal of plaque and blood clot, insertion of stent and/or balloon dilation of single vessel 92941

This procedure involves removing plaque, a substance that can block your blood vessels, and any blood clots. A stent, a tiny tube, may be inserted to keep the vessel open. If necessary, a balloon is inflated to widen the vessel, aiding blood flow.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94558 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$145.99 typical visit price

range $65.08 – $192.16

Typical copayment $36.49 (range $16.27 – $48.04)

Most-billed visit code 99204

Established Patient

$113.15 typical visit price

range $21.86 – $157.83

Typical copayment $28.28 (range $5.46 – $39.45)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 17

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WILLIAM HUSON AU.D.

Audiologist

3443 VILLA LN, SUITE 3
NAPA, CA 94558

Napa County (707) 252-0990

DR. THOMAS T. PAUKERT M.D.

Internal Medicine (Nephrology)

3443 VILLA LN, SUITE 6
NAPA, CA 94558

Napa County (707) 252-8407

NAPA VALLEY NEPHROLOGY AND INTERNAL MEDICINE INC

Internal Medicine (Geriatric Medicine)

3443 VILLA LN, SUITE 6
NAPA, CA 94558

Napa County (707) 252-8407

KEIKO AIKAWA MD

Internal Medicine (Cardiovascular Disease)

3443 VILLA LN, STE 2
NAPA, CA 94558

Napa County (707) 253-8282

BRIAN JO MUNDY M.D.

Internal Medicine (Cardiovascular Disease)

3443 VILLA LN, SUITE 2
NAPA, CA 94558

Napa County (707) 253-8280

GASTROENTEROLOGY ASSOCIATES OF NAPA VALLEY

Internal Medicine (Gastroenterology)

3443 VILLA LN, SUITE 4
NAPA, CA 94558

Napa County (707) 257-0447

CARDIOLOGY CONSULTANTS OF NAPA VALLEY INC A MEDICAL CORPORATION

Internal Medicine (Cardiovascular Disease)

3443 VILLA LN, SUITE 2
NAPA, CA 94558

Napa County (707) 253-8280

DR. DAVID MICHAEL FREETO M.D.

Internal Medicine (Gastroenterology)

3443 VILLA LN, SUITE 4
NAPA, CA 94558

Napa County (707) 257-0447

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Villalon's NPI number?

The NPI number for Mark Villalon is 1720249816. It was assigned to this individual provider in the NPPES registry on June 20, 2008.

Where is Mark Villalon located?

Mark Villalon practices at 3443 Villa Ln Suite 2, Napa, CA 94558. The listed phone number is (707) 253-8280.

What is Mark Villalon's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.

Is Mark Villalon enrolled in Medicare?

Yes. Mark Villalon is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Mark Villalon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Villalon reassigns Medicare benefits to 3 organizations: Northbay Health Medical Foundation (Fairfield, CA), Northbay Healthcare Group (Fairfield, CA) and Regents Of The Univ Of Ca (Davis, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Mark Villalon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Villalon was last updated on July 12, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.