ALISON G. TAN PHD
NPI 1962172593
Psychologist in Carlsbad, CA

Active since September 15, 2021PECOS EnrolledAccepts Medicare Assignment
5838 EDISON PL STE 100, CARLSBAD, CA 92008(215) 344-8187 Get Directions Write a Review

NPPES record last updated: August 25, 2023. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Aug 25, 2023, Sep 15, 2021 (2 updates tracked since 2021).

About Alison G. Tan Phd NPPES

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

ALISON G. TAN PHD (NPI 1962172593) is an individual psychologist in Carlsbad, California, licensed in California (32890) and active in the NPI registry since September 2021. She is enrolled in Medicare PECOS and is a graduate of Other (2020).

NPPES Registry Identity

NPI1962172593
Entity TypeIndividualFemale
Primary Taxonomy103T00000X
Provider Legal NameALISON G. TANCredential: PHD
Location Address5838 EDISON PL STE 100Carlsbad, CA 92008-5520
Mailing Address3333 E Cameron AveWest Covina, CA 91791-3446
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateSeptember 15, 2021
Last NPPES UpdateAugust 25, 20232 updates tracked since enumeration
NPPES CertifiedAugust 11, 2023
✔ NPI 1962172593 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychologistBehavioral Health & Social Service Providers
Taxonomy Code103T00000X
License✔ Licensed in CA · 32890
Definition
A psychologist is an individual who is licensed to practice psychology which is defined as the observation, description, evaluation, interpretation, and modification of human behavior by the application of psychological principles, methods, and procedures, for the purpose of preventing or eliminating symptomatic, maladaptive, or undesired behavior and of enhancing interpersonal relationships, work and life adjustment, personal effectiveness, behavioral health, and mental health. The practice of psychology includes, but is not limited to, psychological testing and the evaluation or assessment of personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning; counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy; diagnosis and treatment of mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability; and psycheducational evaluation, therapy, remediation, and consultation. Psychological services may be rendered to individuals, families, groups and the public.
5838 EDISON PL STE 100, Carlsbad, CA 92008

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

Alison G. Tan Phd 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 ID8325437387
PECOS Enrollment IDI20211112000033
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 Alison Tan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Clinical
1902 WRIGHT PL FL CENTER2
Carlsbad, CA 92008
  • Reassigned Medicare billing, California enrollment
  • 223 clinicians in this Medicare group
Addiction Medicine
4633 OLD IRONSIDES DR STE 304
Santa Clara, CA 95054
  • Reassigned Medicare billing, California enrollment
  • 1,607 clinicians in this Medicare group

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 7

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.

Psychotherapy, 30 minutes 90832
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 30-minute session, the therapist helps you explore feelings, thoughts, and behaviors to better understand yourself and manage life's challenges.
1,052 services183 patients
Psychotherapy, 30 minutes 90832
Psychotherapy is a therapeutic interaction or treatment between a trained professional and a patient. In a 30-minute session, the therapist helps you explore feelings, thoughts, and behaviors to better understand yourself and manage life's challenges.
441 services78 patients
Psychotherapy, 45 minutes 90834
Psychotherapy is a treatment method where you converse with a therapist about your thoughts, feelings, and behaviors. In a 45-minute session, the therapist assists you in understanding and managing your mental health concerns, improving emotional wellness, and promoting personal growth.
164 services22 patients
Psychiatric diagnostic evaluation 90791
A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.
146 services146 patients
Psychiatric services complicated by communication factor 90785
Psychiatric services complicated by communication factors involve mental health care for individuals who have challenges with communication. This can include language barriers, speech disorders, or cognitive impairments. The process involves tailored strategies to ensure effective communication and appropriate mental health care.
131 services56 patients
Psychiatric services complicated by communication factor 90785
Psychiatric services complicated by communication factors involve mental health care for individuals who have challenges with communication. This can include language barriers, speech disorders, or cognitive impairments. The process involves tailored strategies to ensure effective communication and appropriate mental health care.
46 services24 patients

Other Providers at the Same Location NPPES 20

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

Psychologist (Clinical)
5838 EDISON PL STE 100
CARLSBAD, CA 92008
Psychologist (Clinical)
5838 EDISON PL STE 100
CARLSBAD, CA 92008
Nurse Practitioner (Psychiatric/Mental Health)
5838 EDISON PL STE 100
CARLSBAD, CA 92008
Psychologist (Clinical)
5838 EDISON PL STE 100
CARLSBAD, CA 92008
Psychologist (Clinical)
5838 EDISON PL STE 100
CARLSBAD, CA 92008
Psychologist (Clinical)
5838 EDISON PL STE 100
CARLSBAD, CA 92008
Psychologist (Clinical)
5838 EDISON PL STE 100
CARLSBAD, CA 92008
Psychologist (Clinical)
5838 EDISON PL STE 100
CARLSBAD, CA 92008

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 Alison Tan's NPI number?

The NPI number for Alison Tan is 1962172593. It was assigned to this individual provider in the NPPES registry on September 15, 2021.

Where is Alison Tan located?

Alison Tan practices at 5838 Edison Pl Ste 100, Carlsbad, CA 92008. The listed phone number is (215) 344-8187.

What is Alison Tan's specialty?

The primary specialty registered for this NPI is Psychologist with taxonomy code 103T00000X.

Is Alison Tan enrolled in Medicare?

Yes. Alison Tan 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 Alison Tan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alison Tan reassigns Medicare benefits to 2 organizations: Memory Check Psychological Services, A Professional Corporation (Carlsbad, CA) and Sud Specialty Group - Ca (Santa Clara, 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 Alison Tan'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 Alison Tan was last updated on August 25, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.