2026 NPPES data Psychiatry Physician NPI 1386690006 M.D.
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RIGGS ROBERTS, M.D.

Psychiatry Physician in WAILUKU, Hawaii. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
620
Medicare Part D claims · 26 beneficiaries · Psychiatry Physician avg: 1K
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

RIGGS ROBERTS, M.D. filed 620 Medicare Part D claims in 2023 as a Psychiatry Physician in WAILUKU, Hawaii, prescribing 98% generic.

620
Part D claims, 2023
98%
generic prescribing

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

RIGGS ROBERTS, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

620 Top 31% higher than 69% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

Board-eligible specialty (heuristic — not verified)

RIGGS ROBERTS, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about RIGGS ROBERTS, M.D.?

Quality data not reported

NPI registry status

Active

Issued 05/25/2006

NPI 1386690006

Primary specialty

Psychiatry Physician

High-volume

53,104 US NPIs in this specialty

Medicare Part D claims

620 40% vs specialty avg

2023 prescription claims

Specialty avg: 1,038

Specialty distribution in Hawaii

How Psychiatry Physician compares to other specialties among Hawaii providers

Hawaii providers

Psychiatry Physician share within Hawaii

1. Psychiatry Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Psychiatry Physician share within Hawaii

Specialty board-certification context

Estimated specialty board-certified rate — Psychiatry Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Psychiatry Physician ABMS/AOA estimate

Est. board-certified rate (Psychiatry Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Psychiatry Physician) — ABMS / AOA estimate

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

RIGGS ROBERTS, M.D. appears in the CMS NPPES registry as a Psychiatry Physician provider holding M.D. credentials at 1883 MILL ST STE B, WAILUKU, HI, 96793, with a listed phone of (808) 242-9233. NPI 1386690006 was issued on 05/25/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ROBERTS most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 620 prescription claims written by this provider, covering 26 Medicare beneficiaries and totaling roughly $13K in drug spend, split 2% brand-name and 98% generic by claim count, with an opioid prescribing rate of 9.7%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

Psychiatry Physician is a high-volume specialty nationwide, with 53,104 enrolled providers across 56 states and an average of 1,038 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1883 MILL ST STE B
WAILUKU, HI 96793

Provider Details

NPI 1386690006
Specialty Psychiatry Physician
Credentials M.D.
Gender Male
NPI Issued 05/25/2006

Brand vs generic prescribing mix · Generic-heavy

RIGGS ROBERTS, M.D. — brand share 2.0%
Specialty average (est.)

2% brand-name claims vs 98% generic, on 620 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

620
Total Claims
$13K
Total Drug Cost
26
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
728
Total Day Supply
20,311
Brand vs Generic
2% brand / 98% generic
Brand Drug Cost
$625
Generic Drug Cost
$13K
Opioid Claims
60 (9.7% rate)

Patient Demographics

Average Patient Age
63.3 years
Avg HCC Risk Score
1.09
Age Distribution
<65: 12, 65-74: N/A, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What RIGGS ROBERTS, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Lamotrigine
66
Alprazolam
51
Clonazepam
49
Propranolol Hcl
40
Risperidone
30
Quetiapine Fumarate
28
Lithium Carbonate
26
Lorazepam
23
Olanzapine
23
Morphine Sulfate
20

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Psychiatry Physician Overview

How RIGGS ROBERTS, M.D. fits within the Psychiatry Physician landscape nationally.

53,104
Psychiatry Physician Providers in US
56
States with Psychiatry Physician
1,038
Avg Claims per Provider

RIGGS ROBERTS, M.D.'s 620 claims are below the specialty average of 1,038.

Nearby Psychiatry Physician Providers in Hawaii

Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as ROBERTS.

Compare Psychiatry Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is RIGGS ROBERTS, M.D.'s specialty?
RIGGS ROBERTS, M.D. specializes in Psychiatry Physician and practices in WAILUKU, Hawaii. Credentials: M.D..
How much does RIGGS ROBERTS, M.D. prescribe under Medicare Part D?
In 2023, RIGGS ROBERTS, M.D. wrote 620 Medicare Part D claims totaling $13K in drug costs for 26 beneficiaries.
Where is RIGGS ROBERTS, M.D. located?
RIGGS ROBERTS, M.D. is located at 1883 MILL ST STE B, WAILUKU, HI, 96793. Phone: (808) 242-9233.
What is RIGGS ROBERTS, M.D.'s NPI number?
RIGGS ROBERTS, M.D.'s National Provider Identifier (NPI) is 1386690006, issued on 05/25/2006.
Does RIGGS ROBERTS, M.D. prescribe more brand-name or generic drugs?
RIGGS ROBERTS, M.D.'s prescribing is 2% brand-name and 98% generic drugs by claim count, with $625 in brand drug costs.
Does RIGGS ROBERTS, M.D. prescribe opioids?
Yes, RIGGS ROBERTS, M.D. had 60 opioid claims in 2023 with an opioid prescribing rate of 9.7%.
How many Psychiatry Physician providers are there in the US?
There are 53,104 Psychiatry Physician providers across 56 states in the US. The average Psychiatry Physician provider writes 1,038 Medicare Part D claims per year.
What drugs does RIGGS ROBERTS, M.D. prescribe most often?
Based on 2023 Medicare Part D data, RIGGS ROBERTS, M.D.'s most frequently prescribed drugs include Lamotrigine, Alprazolam, Clonazepam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does RIGGS ROBERTS, M.D. accept Medicare?
RIGGS ROBERTS, M.D. appears in CMS Medicare data with 620 Part D claims and 26 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify RIGGS ROBERTS, M.D.'s credentials?
RIGGS ROBERTS, M.D.'s NPI is 1386690006 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology