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MRS. CHAYANIN HAMADA M.D.
NPI 1639603566
Psychiatry & Neurology - Child & Adolescent Psychiatry in Honolulu, HI

Active since April 18, 2017PECOS EnrolledAccepts Medicare Assignment
1301 PUNCHBOWL ST, HONOLULU, HI 96813(808) 691-1000 Get Directions Write a Review

NPPES record last updated: March 19, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 19, 2025, Aug 9, 2022, Aug 27, 2020 and 2 more (5 updates tracked since 2017).

About Mrs. Chayanin Hamada M.d. NPPES

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

MRS. CHAYANIN HAMADA M.D. (NPI 1639603566) is an individual child & adolescent psychiatry provider in Honolulu, Hawaii, licensed in Hawaii (MD-22173) and active in the NPI registry since April 2017. She is enrolled in Medicare PECOS, is affiliated with The Queens Medical Center, and maintains a secondary practice location in Boston.

NPPES Registry Identity

NPI1639603566
Entity TypeIndividualFemale
Primary Taxonomy2084P0804X
Provider Legal NameMRS. CHAYANIN HAMADACredential: M.D.
Location Address1301 PUNCHBOWL STHonolulu, HI 96813-2499
Mailing Address1301 Punchbowl StHonolulu, HI 96813-2499 · (808) 691-1000
Phone(808) 691-1000
Sole ProprietorNo
Medical School CMSOtherGraduated 2014
Enumeration DateApril 18, 2017
Last NPPES UpdateMarch 19, 20255 updates tracked since enumeration
NPPES CertifiedAugust 9, 2022
✔ NPI 1639603566 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
Licenses✔ Licensed in HI · MD-22173✔ Licensed in MA · ETELL344284681
Definition
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
1301 PUNCHBOWL ST, Honolulu, HI 96813
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Secondary Practice Location 1

Location 1Tufts Medical Center 800 Washington Street #1007Boston, MA 02111 · Phone (617) 636-0219

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include HMSA.Insurance ›

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

Mrs. Chayanin Hamada 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 ID5395123616
PECOS Enrollment IDI20220527000582
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 Chayanin Hamada reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Queens University Medical Group
Same address
Multi-Specialty
1301 PUNCHBOWL ST
Honolulu, HI 96813
  • Reassigned Medicare billing, Hawaii enrollment
  • 859 clinicians in this Medicare group
NPI 1891441382 (808) 691-1000
The Queen's Medical Center
Same address
General Acute Care Hospital
1301 PUNCHBOWL ST
Honolulu, HI 96813
  • Reassigned Medicare billing, Hawaii enrollment
  • Medicare enrollment name: The Queens Medical Center
  • 809 clinicians in this Medicare group
NPI 1487693586 (808) 538-9011

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

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

The Queens Medical Center

Acute Care Hospitals · Honolulu, HI
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number120001
Location1301 Punchbowl StHonolulu, HI 96813 · Honolulu County
Emergency services Birthing friendly

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.

NISHAL BRAHMBHATT MD
Internal Medicine (Critical Care Medicine)
1301 PUNCHBOWL ST
HONOLULU, HI 96813
Honolulu County (808) 691-1000
DR. THOMAS JON UYEHARA WONG MD
Internal Medicine (Pulmonary Disease)
1301 PUNCHBOWL ST
HONOLULU, HI 96813
Honolulu County (808) 691-1000
IMTIAZ HUSSAIN BANGASH MD
Hospitalist
1301 PUNCHBOWL ST
HONOLULU, HI 96813
Honolulu County (808) 691-1000
CHRISTINE TRANG WARNER PA
Physician Assistant
1301 PUNCHBOWL ST
HONOLULU, HI 96813
Honolulu County (808) 597-8799
QUEENS MEDICAL CENTER
Psychiatric Hospital
1301 PUNCHBOWL ST
HONOLULU, HI 96813
Honolulu County (808) 537-7878
NOOR SHAFIE LE, COE
Specialist
1301 PUNCHBOWL ST
HONOLULU, HI 96813
Honolulu County (808) 783-4088
JONATHAN KAMINAKA
Physical Therapist
1301 PUNCHBOWL ST
HONOLULU, HI 96813
Honolulu County (808) 691-1000
DR. ISAAC WENTZ MD
Psychiatry & Neurology (Psychiatry)
1301 PUNCHBOWL ST
HONOLULU, HI 96813
Honolulu County (808) 691-1000

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 Chayanin Hamada's NPI number?

The NPI number for Chayanin Hamada is 1639603566. It was assigned to this individual provider in the NPPES registry on April 18, 2017.

Where is Chayanin Hamada located?

Chayanin Hamada practices at 1301 Punchbowl St, Honolulu, HI 96813. The listed phone number is (808) 691-1000.

What is Chayanin Hamada's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Chayanin Hamada enrolled in Medicare?

Yes. Chayanin Hamada 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 Chayanin Hamada's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Chayanin Hamada reassigns Medicare benefits to 2 organizations: Queens University Medical Group (Honolulu, HI) and The Queen's Medical Center (Honolulu, HI). 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 Chayanin Hamada's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Chayanin Hamada accept?

Health plans from HMSA list Chayanin Hamada 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 Chayanin Hamada affiliated with any hospitals?

According to CMS data, Chayanin Hamada is affiliated with The Queens Medical Center.

When was this NPI record last updated?

The NPPES record for Chayanin Hamada was last updated on March 19, 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.