DR. GEORGE STUART MENDENHALL MD
NPI 1699925545
Internal Medicine - Cardiovascular Disease in La Jolla, CA

Q: What is George Mendenhall's NPI number?

The NPI number for George Mendenhall is 1699925545. It was assigned to this individual provider in the NPPES registry on September 29, 2008.

Q: What is George Mendenhall's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Q: When was this NPI record last updated?

The NPPES record for George Mendenhall was last updated on March 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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 September 29, 2008PECOS EnrolledAccepts Medicare Assignment

9850 GENESEE AVE STE 940, LA JOLLA, CA 92037(858) 658-0020(858) 457-8653 Get Directions Write a Review

NPPES record last updated: March 25, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. George Stuart Mendenhall Md NPPES

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

DR. GEORGE STUART MENDENHALL MD (NPI 1699925545) is an individual cardiovascular disease provider in La Jolla, California, licensed in Pennsylvania (MD435413) and active in the NPI registry since September 2008. He is enrolled in Medicare PECOS and is a graduate of Harvard Medical School (2003).

NPPES Registry Identity

NPI1699925545

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameDR. GEORGE STUART MENDENHALLCredential: MD

Location Address9850 GENESEE AVE STE 940La Jolla, CA 92037

Mailing Address9850 Genesee Ave Ste 940La Jolla, CA 92037-1220 · (858) 658-0088 · Fax (858) 658-0084

Phone(858) 658-0020

Fax(858) 457-8653

Sole ProprietorNo

Medical School CMSHarvard Medical SchoolGraduated 2003

Enumeration DateSeptember 29, 2008

Last NPPES UpdateMarch 25, 2026

NPPES CertifiedMarch 25, 2026

✔ NPI 1699925545 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in PA · MD435413

Definition

An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.

9850 GENESEE AVE STE 940, La Jolla, CA 92037

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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

Dr. George Stuart Mendenhall 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 ID9335207729

PECOS Enrollment IDI20180220002510

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 George Mendenhall reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cardiac Arrhythmia Associates, A Medical Corporation

Same address

Clinical Cardiac Electrophysiology

9850 GENESEE AVENUE, SUITE 940
La Jolla, CA 92037

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

NPI 1023042751 (858) 658-0020

Scripps Cardiology Medical Group, Inc.

0.2 mi

Cardiovascular Disease

9888 GENESEE AVE
La Jolla, CA 92037

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

NPI 1851481121 (858) 824-2900

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 33

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.

Collection and interpretation of physical parameters stored in computers and/or transmitted by the patient and/or caregiver to qualified health care professional, requiring 30 minutes or more, per 30 days 99091

This service involves gathering and analyzing health data from a patient, which is digitally stored and sent to a healthcare professional. This may include heart rate, blood pressure, or blood sugar levels. The process takes at least 30 minutes and is repeated every 30 days.

1,170 services114 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.

914 services465 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.

803 services430 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.

696 services87 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

665 services402 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.

544 services185 patients

Evaluation of cardiac rhythm monitor system, remote up to 30 days 93298

This procedure involves remotely monitoring your heart rhythm for up to 30 days. A small device will record your heart's activity, which can be accessed by your healthcare team. This aids in diagnosing any irregularities or issues with your heart function.

311 services36 patients

Programming of dual lead pacemaker system 93280

Programming of a dual lead pacemaker system is a procedure to adjust your heart's pacemaker settings. This process involves a small device, called a programmer, that communicates with your pacemaker to ensure it's working optimally for your heart's needs.

265 services139 patients

Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days 93295

This procedure involves remotely monitoring your implantable defibrillator system, which can have single, dual, or multiple leads. Over a period of up to 90 days, the system's performance is evaluated to ensure it's working properly and providing the necessary heart rhythm support.

165 services53 patients

Programming of multiple lead pacemaker system 93281

Programming of a multiple lead pacemaker system involves adjusting settings on your pacemaker device to optimize its function. This device uses electrical impulses to regulate your heart's rhythm. The procedure ensures it's working effectively for your specific needs.

135 services65 patients

Heart rhythm recording of continous external ekg over 8-15 days 93246

A heart rhythm recording is a non-invasive procedure where a small device, attached externally, monitors your heart's electrical activity for 8-15 days. It helps detect irregular heart rhythms, assess heart rate, and guide treatment decisions. It's safe, painless, and can be done during normal daily activities.

125 services90 patients

Heart rhythm review and interpretation of continous external ekg over 8-15 days 93248

This service involves wearing a device for 8-15 days that continuously records your heart's electrical activity. It helps in identifying irregular heart rhythms. The recorded data is then reviewed and interpreted by a healthcare professional for any abnormalities.

125 services90 patients

Programming of multiple lead implantable defibrillator system 93284

Programming of a multiple lead implantable defibrillator system involves adjusting settings on your implanted device to help control irregular heart rhythms. The process is non-invasive and helps ensure optimal device performance for maintaining heart health.

88 services43 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.

87 services83 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

81 services81 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.

74 services33 patients

Programming of cardiac rhythm monitor system 93285

Programming of a cardiac rhythm monitor system involves setting up a device to track your heart's activity. This helps identify irregular heartbeats or rhythms. The data collected assists your healthcare team in making accurate treatment decisions.

63 services33 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.

53 services21 patients

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

53 services52 patients

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

52 services49 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.

38 services38 patients

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.

37 services36 patients

Programming of dual lead implantable defibrillator system 93283

Programming of a dual lead implantable defibrillator system involves adjusting settings on a device implanted in your chest. This device monitors your heart rhythm and delivers electrical pulses to correct irregular heartbeats, helping maintain a healthy heart rhythm.

36 services17 patients

Programming of single lead pacemaker system 93279

Programming of a single lead pacemaker system involves adjusting the pacemaker's settings to suit your heart's unique needs. This is done using a special device that communicates with the pacemaker, ensuring it helps your heart beat at an optimal rate.

23 services16 patients

Insertion of pacemaker and upper and lower heart chamber electrode 33208

A pacemaker insertion is a procedure where a small device, called a pacemaker, is implanted under your skin. This device uses electrical pulses to prompt the heart to beat at a normal rate. Electrodes are placed in the upper and lower chambers of your heart to help regulate your heartbeat.

21 services21 patients

Ultrasound of heart blood flow, valves and chambers 93320

An ultrasound of your heart, also known as an echocardiogram, is a test that uses sound waves to create detailed images of your heart. It helps doctors check the health of your heart's chambers, valves, and blood flow.

21 services21 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.

21 services21 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.

21 services21 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.

18 services17 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system 93288

An evaluation of a pacemaker system examines how well your heart device is working. Single, dual, multiple lead, or leadless refers to the wires that deliver electrical pulses from the pacemaker to your heart. This check ensures your heart is receiving the right amount of support from the device.

16 services14 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.

15 services14 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

13 services11 patients

External shock to heart to regulate heart beat 92960

This procedure, known as cardioversion, uses an external electrical shock to restore your heart's normal rhythm. It's typically performed when irregular heartbeats, or arrhythmias, are causing severe symptoms and aren't responding to medications.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92037 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

$140.22 typical visit price

range $62.10 – $184.71

Typical copayment $35.05 (range $15.52 – $46.17)

Most-billed visit code 99204

Established Patient

$76.87 typical visit price

range $20.62 – $151.42

Typical copayment $19.21 (range $5.15 – $37.85)

Most-billed visit code 99213

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

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

DAVID COHEN M.D.

Internal Medicine (Clinical Cardiac Electrophysiology)

9850 GENESEE AVE STE 940
LA JOLLA, CA 92037

San Diego County (858) 658-0020

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 George Mendenhall's NPI number?

The NPI number for George Mendenhall is 1699925545. It was assigned to this individual provider in the NPPES registry on September 29, 2008.

Where is George Mendenhall located?

George Mendenhall practices at 9850 Genesee Ave Ste 940, La Jolla, CA 92037. The listed phone number is (858) 658-0020.

What is George Mendenhall's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is George Mendenhall enrolled in Medicare?

Yes. George Mendenhall 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 George Mendenhall's services?

According to the CMS Revalidation Reassignment List (October 2026 release), George Mendenhall reassigns Medicare benefits to 2 organizations: Cardiac Arrhythmia Associates, A Medical Corporation (La Jolla, CA) and Scripps Cardiology Medical Group, Inc. (La Jolla, 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 George Mendenhall'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 George Mendenhall was last updated on March 25, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months 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.