1. Home
  2. Directory
  3. California
  4. Arcadia
  5. Psychiatry Neurology
  6. NPI Profile

ARTHUR AN M.D.
NPI 1649293259
Psychiatry & Neurology - Neurology in Arcadia, CA

Active since July 25, 2006PECOS EnrolledAccepts Medicare Assignment
75/100
CMS Quality Rating
1015 N FIRST AVE, SUITE A, ARCADIA, CA 91006(626) 332-7090(800) 924-7301 Get Directions Write a Review

NPPES record last updated: March 13, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Arthur An M.d. NPPES

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

ARTHUR AN M.D. (NPI 1649293259) is an individual neurology provider in Arcadia, California, licensed in California (A61877) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Tulane University School Of Medicine (1995).

NPPES Registry Identity

NPI1649293259
Entity TypeIndividualMale
Primary Taxonomy2084N0400X
Provider Legal NameARTHUR ANCredential: M.D.
Location Address1015 N FIRST AVE, SUITE AArcadia, CA 91006-7401
Mailing Address1015 N First Ave, Suite AArcadia, CA 91006-7401 · (626) 566-2866 · Fax (626) 566-2850
Phone(626) 332-7090
Fax(800) 924-7301
Sole ProprietorYes
Medical School CMSTulane University School Of MedicineGraduated 1995
Enumeration DateJuly 25, 2006
Last NPPES UpdateMarch 13, 2025
NPPES CertifiedMarch 13, 2025
✔ NPI 1649293259 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0400X
License✔ Licensed in CA · A61877
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.
1015 N FIRST AVE, Arcadia, CA 91006
Open in Google Maps ↗

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

Arthur An 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 ID1557447729
PECOS Enrollment IDI20080327000813
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

2

Medicare enrollment records show Arthur An reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Arthur An M D Inc
Same address
Specialist
1015 N 1ST AVE
Arcadia, CA 91006
  • Reassigned Medicare billing, California enrollment
NPI 1558572610 (626) 566-2866
County Of Los Angeles
1.5 mi
Public Health, State or Local
330 W MAPLE AVE
Monrovia, CA 91016
  • Reassigned Medicare billing, California enrollment
  • 1,939 clinicians in this Medicare group
NPI 1659565406 (626) 256-1600

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 6

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.
293 services198 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.
187 services110 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.
105 services46 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.
92 services92 patients
Measurement of brain wave activity (eeg), awake and asleep 95819
The measurement of brain wave activity, known as an EEG, records the brain's electrical signals. It's performed when you're awake and asleep to monitor your brain's functioning. It helps in diagnosing conditions like epilepsy, sleep disorders, and other neurological issues.
64 services61 patients
Nerve conduction, 13 or more studies 95913
Nerve conduction studies involve 13 or more tests to check the speed and strength of signals traveling between your nerves and muscles. It helps diagnose conditions affecting nerves and muscles. The test involves small shocks and may cause minor discomfort.
46 services46 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91006 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.

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.

75/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Individually scored

Other Providers at the Same Location NPPES

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

DR. MORRIS POWAZEK PHD
Psychologist (Clinical)
1015 N FIRST AVE, SUITE A
ARCADIA, CA 91006
Los Angeles County (626) 332-7090

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 Arthur An's NPI number?

The NPI number for Arthur An is 1649293259. It was assigned to this individual provider in the NPPES registry on July 25, 2006.

Where is Arthur An located?

Arthur An practices at 1015 N First Ave Suite A, Arcadia, CA 91006. The listed phone number is (626) 332-7090.

What is Arthur An's specialty?

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

Is Arthur An enrolled in Medicare?

Yes. Arthur An 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 Arthur An's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Arthur An reassigns Medicare benefits to 2 organizations: Arthur An M D Inc (Arcadia, CA) and County Of Los Angeles (Monrovia, 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 Arthur An'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 Arthur An was last updated on March 13, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.