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DR. JOHN ARLEN PARKER M.D.
NPI 1386088698
Psychiatry & Neurology - Neurology in Whittier, CA

Active since April 18, 2013PECOS Enrolled
10820 BEVERLY BLVD STE A5282, WHITTIER, CA 90601(704) 340-7104 Get Directions Write a Review

NPPES record last updated: November 3, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Nov 3, 2025, Sep 8, 2023, Dec 13, 2022 and 8 more (11 updates tracked since 2017).

About Dr. John Arlen Parker M.d. NPPES

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

DR. JOHN ARLEN PARKER M.D. (NPI 1386088698) is an individual neurology provider in Whittier, California, licensed in California (A133050) and active in the NPI registry since April 2013. He is enrolled in Medicare PECOS, is affiliated with Methodist Hospital For Surgery, and maintains 5 additional practice locations.

NPPES Registry Identity

NPI1386088698
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameDR. JOHN ARLEN PARKERCredential: M.D.
Location Address10820 BEVERLY BLVD STE A5282Whittier, CA 90601-2576
Mailing Address10820 Beverly Blvd Ste A5282Whittier, CA 90601-2576 · (510) 333-3560
Phone(704) 340-7104
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateApril 18, 2013
Last NPPES UpdateNovember 3, 202511 updates tracked since enumeration
NPPES CertifiedNovember 3, 2025
✔ NPI 1386088698 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
Licenses✔ Licensed in CA · A133050✔ Licensed in NY · 299383-1✔ Licensed in CO · DR.0062481✔ Licensed in MI · 4301500468✔ Licensed in TX · S7309✔ Licensed in NM · MD2020-0551✔ Licensed in NJ · 25MA10622200✔ Licensed in GA · 83355✔ Licensed in SC · MD82910
Definition
A Neurologist specializes in the diagnosis and treatment of diseases or impaired function of the brain, spinal cord, peripheral nerves, muscles, autonomic nervous system, and blood vessels that relate to these structures.
10820 BEVERLY BLVD STE A5282, Whittier, CA 90601
Open in Google Maps ↗

Secondary Practice Locations 5

Location 199 South Almaden Blvd Ste 600San Jose, CA 95113-1605 · Phone (615) 346-8182 ext. 932 · Fax (615) 829-8970
Location 2336 22nd Ave NNashville, TN 37203-1844 · Phone (615) 346-8182 · Fax (615) 829-8970
Location 31540 Alcazar St Ste 209-GLos Angeles, CA 90089-0080 · Phone (323) 422-0117
Location 45553 Mavis AveWhittier, CA 90601-2124 · Phone (615) 346-8182 · Fax (615) 829-8970
Location 545211 Helm StPlymouth, MI 48170-6023 · Phone (480) 775-1921 · Fax (480) 777-1345

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Health Advantage, HMO Louisiana and more.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. John Arlen Parker M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID446566764
PECOS Enrollment IDI20180702002843, I20201102002502, I20250225003980
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

6

Medicare enrollment records show John Parker reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Usc Care Medical Group, Inc
9.6 mi
General Practice
1520 SAN PABLO ST
Los Angeles, CA 90033
  • Reassigned Medicare billing, California enrollment
  • 2,445 clinicians in this Medicare group
NPI 1902846306 (323) 442-5955
Gamma Neuro Network Inc
23 mi
Clinical Neurophysiology
475 WASHINGTON BLVD
Marina Del Rey, CA 90292
  • Reassigned Medicare billing, California and Texas enrollments
  • 6 clinicians in this Medicare group
NPI 1992413157 (310) 923-1437
Real Time Neuromonitoring Associates Of Ca PC
315 mi
Specialist
99 SOUTH ALMADEN BLVD, STE 600
San Jose, CA 95113
  • Reassigned Medicare billing, California and Texas enrollments
  • 3 clinicians in this Medicare group
NPI 1336492800 (615) 346-8182
Interpreting Physician Associates LLC
1,358 mi
Electrodiagnostic Medicine
3497 WAGON WHEEL RD
Springdale, AR 72762
  • Reassigned Medicare billing, California enrollment
  • 2 clinicians in this Medicare group
NPI 1316487929 (877) 295-2554
Rtna PC
1,770 mi
Specialist
336 22ND AVE N
Nashville, TN 37203
  • Reassigned Medicare billing, Texas enrollment
  • 15 clinicians in this Medicare group
NPI 1871830380 (615) 346-8182
Novant Health Southeastern Spine Institute, LLC
2,197 mi
Interventional Pain Medicine
1625 HOSPITAL DR
Mt Pleasant, SC 29464
  • Reassigned Medicare billing, South Carolina enrollment
  • 24 clinicians in this Medicare group
NPI 1134943459 (843) 849-1551

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 10

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.

Continuous intraoperative neurophysiology monitoring, from outside the operating room (remote or nearby), per patient, (attention directed exclusively to one patient) each 15 minutes (list in addition to primary procedure) G0453
Continuous intraoperative neurophysiology monitoring is a service where a specialist oversees your nervous system's function during surgery, from a nearby or remote location. This is done every 15 minutes and is focused solely on you. It helps ensure surgical safety by identifying any potential nervous system changes promptly.
1,793 services608 patients
Placement of skin electrodes and measurement of stimulated sites on arms and legs 95938
This procedure involves placing small pads (electrodes) on your arms and legs. These electrodes send gentle electric signals to specific areas, and the responses are measured. This helps assess the health of your nerves and muscles.
596 services591 patients
Testing of nerve-muscle junction 95937
Testing of the nerve-muscle junction, also known as Electromyography (EMG), is a diagnostic procedure to evaluate the health of muscles and the nerve cells that control them. It involves a small device detecting electrical activity from your muscles to identify potential issues.
525 services522 patients
Measurement of brain wave activity (eeg) outside the brain during surgery 95955
An EEG (Electroencephalogram) during surgery monitors brain activity. Electrodes on the scalp record brain wave patterns, helping doctors ensure the brain is functioning normally throughout the procedure.
494 services490 patients
Placement of skin electrodes and measurement of central motor stimulation in arms and legs 95939
This procedure involves placing small patches (electrodes) on your skin over your arms and legs. These electrodes send harmless electrical signals to your muscles. The response is measured to assess the health and function of your nerves and muscles.
324 services322 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.
309 services307 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Methodist Hospital For Surgery

Acute Care Hospitals · Addison, TX
4/5 CMS rating
OwnershipProprietary
CMS Certification Number670073
Location17101 Dallas ParkwayAddison, TX 75001 · Dallas County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90601 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

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 John Parker's NPI number?

The NPI number for John Parker is 1386088698. It was assigned to this individual provider in the NPPES registry on April 18, 2013.

Where is John Parker located?

John Parker practices at 10820 Beverly Blvd Ste A5282, Whittier, CA 90601. The listed phone number is (704) 340-7104.

What is John Parker's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.

Is John Parker enrolled in Medicare?

Yes. John Parker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for John Parker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Parker reassigns Medicare benefits to 6 organizations: Usc Care Medical Group, Inc (Los Angeles, CA), Gamma Neuro Network Inc (Marina Del Rey, CA), Real Time Neuromonitoring Associates Of Ca PC (San Jose, CA), Interpreting Physician Associates LLC (Springdale, AR), Rtna PC (Nashville, TN) and 1 more organization, listed in the Medicare section above. 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 John Parker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Parker accept?

Health plans from Blue Cross and Blue Shield of Texas, HMO Louisiana, Health Advantage, Moda Health Plan, Inc. and Octave list John Parker as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is John Parker affiliated with any hospitals?

According to CMS data, John Parker is affiliated with Methodist Hospital For Surgery.

When was this NPI record last updated?

The NPPES record for John Parker was last updated on November 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.