DR. ER-KAI GAO M.D.
NPI 1710064944
Neurological Surgery in La Mesa, CA

Q: What is Er-kai Gao's NPI number?

The NPI number for Er-kai Gao is 1710064944. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Q: What is Er-kai Gao's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Q: When was this NPI record last updated?

The NPPES record for Er-kai Gao was last updated on September 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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 November 01, 2006PECOS EnrolledAccepts Medicare Assignment

5.89/100

CMS Quality Rating

8851 CENTER DR STE 603, LA MESA, CA 91942(619) 667-4545(619) 667-4550 Get Directions Write a Review

NPPES record last updated: September 8, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

On this page

About Dr. Er-kai Gao M.d. NPPES

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

DR. ER-KAI GAO M.D. (NPI 1710064944) is an individual neurological surgery provider in La Mesa, California, licensed in California (A71659) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1983).

NPPES Registry Identity

NPI1710064944

Entity TypeIndividualMale

Primary Taxonomy207T00000X

Provider Legal NameDR. ER-KAI GAOCredential: M.D.

Location Address8851 CENTER DR STE 603La Mesa, CA 91942-3063

Mailing Address8851 Center Dr Ste 603La Mesa, CA 91942-3063 · (619) 667-4545 · Fax (619) 667-4550

Phone(619) 667-4545

Fax(619) 667-4550

Sole ProprietorNo

Medical School CMSOtherGraduated 1983

Enumeration DateNovember 1, 2006

Last NPPES UpdateSeptember 8, 2021

NPPES CertifiedSeptember 8, 2021

✔ NPI 1710064944 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNeurological SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207T00000X

License✔ Licensed in CA · A71659

Definition

A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.

Also ListedPsychiatry & Neurology · NeurologyTaxonomy 2084N0400X · License A71659 (CA)

8851 CENTER DR STE 603, La Mesa, CA 91942

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Other Identifiers 1

Medicaid00A716590CA

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. Er-kai Gao M.d. 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 ID8123001815

PECOS Enrollment IDI20040612000502

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 Er-kai Gao reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Er-Kai Gao MD Inc.

Same address

Neurology

8851 CENTER DR, SUITE 603
La Mesa, CA 91942

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

NPI 1912070673 (619) 667-4546

Mobile Neurology Of San Diego

Same address

Neurology

8851 CENTER DR, SUITE 603
La Mesa, CA 91942

Reassigned Medicare billing, California enrollment

NPI 1043621394 (619) 667-4545

Emergency And Acute Care Medical Corporation

8.7 mi

Emergency Medicine

7901 FROST ST
San Diego, CA 92123

Reassigned Medicare billing, California enrollment
1,437 clinicians in this Medicare group

NPI 1437103942 (858) 939-3400

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 19

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.

Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes 99309

A follow-up nursing facility visit per day is a daily check-in by a healthcare professional. This 25-minute visit typically involves monitoring your health progress, addressing any concerns, and adjusting treatment plans as necessary. It's a vital part of ensuring your ongoing wellbeing.

1,955 services432 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.

885 services359 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.

365 services203 patients

Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more 99306

An initial nursing facility visit is your first meeting with your healthcare team at a nursing facility. Lasting typically 45 minutes, this appointment involves a comprehensive health assessment and the creation of your personalized care plan. It's a crucial step to ensure your health and well-being.

347 services346 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.

197 services19 patients

Needle measurement of electrical activity in arm or leg muscles, complete study 95886

This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. This complete study helps diagnose issues with nerves or muscles, providing valuable data for your treatment plan.

166 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.

150 services150 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.

132 services81 patients

Nerve conduction, 11-12 studies 95912

Nerve conduction studies are tests that measure how well your nerves are working. In 11-12 studies, small electrodes are placed on your skin to send and receive electrical signals. These signals show how quickly and effectively your nerves are transmitting signals, helping to identify any nerve damage or dysfunction.

97 services96 patients

Nerve conduction, 9-10 studies 95911

Nerve conduction studies involve sending small electrical shocks through the skin to measure how quickly nerves transmit signals. This helps detect nerve damage. 9-10 studies mean this process will be repeated on different nerves to gather comprehensive data.

88 services85 patients

Evaluation of neuropsychological test, first hour 96132

An evaluation of neuropsychological tests is a process to assess your brain's function. It involves tasks designed to measure cognitive abilities such as memory, attention, problem-solving, and language skills. The first hour involves initial testing and observation.

87 services85 patients

Administration of psychological or neuropsychological test, first 30 minutes 96136

This procedure involves a health professional conducting a psychological or neuropsychological test. The first 30 minutes typically involve understanding your mental health or brain function through various assessments. This helps in diagnosing and treating mental health disorders effectively.

87 services85 patients

Measurement of brain wave activity (eeg), 41-60 minutes 95812

This procedure involves placing small sensors on your head to record your brain's electrical activity for 41-60 minutes. Known as an EEG, it helps doctors understand how your brain works, assisting in diagnosing conditions like epilepsy or sleep disorders.

54 services48 patients

Measurement of brain wave activity (eeg), 61-119 minutes 95813

The procedure you're having is an EEG, which measures your brain's electrical activity. Electrodes placed on your scalp capture signals that are recorded for 61-119 minutes. This helps identify any irregularities, aiding in diagnosing conditions like epilepsy or sleep disorders.

54 services46 patients

Telephone medical discussion with physician, 21-30 minutes 99443

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

52 services18 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.

20 services19 patients

Assessment of and care planning for patient with impaired thought processing, typically 60 minutes 99483

This service involves a thorough evaluation of your thought processes, which may be impacting your daily life. In a typical 50-minute session, a healthcare professional will assess your cognitive abilities, identify any areas of concern, and develop a personalized care plan to help improve your mental function.

19 services19 patients

Needle measurement of electrical activity in arm or leg muscles, 2 extremities 95861

This procedure, known as an electromyography (EMG), involves inserting a small needle into your arm or leg muscles to measure their electrical activity. It helps diagnose conditions affecting nerves or muscles. It's generally painless, though you may feel some discomfort.

16 services15 patients

Testing of autonomic (sympathetic) nervous system function 95923

Testing of autonomic nervous system function assesses how well your body's automatic processes, like heart rate and blood pressure, are working. It involves various non-invasive tests like heart rate variability and sweat production tests.

13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91942 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

5.89/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

Improvement Activities

Cost

19.63

Referred Medical Equipment & Supplies CMS DME claims

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Wrist hand orthosis, wrist extension control cock-up, non molded, prefabricated, off-the-shelf L3908

DME-Orthotic Devices · category DF000N

2 suppliers13 claims24 services$57.15 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 2

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

DR. YU DENNIS CHENG M.D.

Neurological Surgery

8851 CENTER DR STE 603
LA MESA, CA 91942

San Diego County (619) 667-4545

JOY GAO DNP

Nurse Practitioner (Family)

8851 CENTER DR STE 603
LA MESA, CA 91942

San Diego County (619) 667-4545

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 Er-kai Gao's NPI number?

The NPI number for Er-kai Gao is 1710064944. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Er-kai Gao located?

Er-kai Gao practices at 8851 Center Dr Ste 603, La Mesa, CA 91942. The listed phone number is (619) 667-4545.

What is Er-kai Gao's specialty?

The primary specialty registered for this NPI is Neurological Surgery with taxonomy code 207T00000X.

Is Er-kai Gao enrolled in Medicare?

Yes. Er-kai Gao 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 Er-kai Gao's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Er-kai Gao reassigns Medicare benefits to 3 organizations: Er-Kai Gao MD Inc. (La Mesa, CA), Mobile Neurology Of San Diego (La Mesa, CA) and Emergency And Acute Care Medical Corporation (San Diego, 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 Er-kai Gao'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 Er-kai Gao was last updated on September 8, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.