2026 NPPES data Psychiatry Physician NPI 1003829789 MD
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Ericka Rivera Castro, MD

Psychiatry Physician in San Juan, Puerto Rico. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers — including 53,104 in Psychiatry Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration — see our methodology.

Federal data — no proprietary rating. We show these CMS records as-is — no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
6K
Medicare Part D claims · 244 beneficiaries · Psychiatry Physician avg: 1K
Generic prescribing
>99%
generic claims · <1% brand-name · higher generic rates reduce patient out-of-pocket costs
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Ericka Rivera Castro, MD filed 5,533 Medicare Part D claims in 2023 as a Psychiatry Physician in San Juan, Puerto Rico, prescribing >99% generic.

6K
Part D claims, 2023
>99%
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.

Ericka Rivera Castro, MD's Medicare Part D volume vs every U.S. prescriber

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

5,533 Top 5% higher than 95% 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%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

Ericka Rivera Castro, MD 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 Ericka Rivera Castro, MD?

Quality data not reported

NPI registry status

Active

Issued 08/14/2006

NPI 1003829789

Primary specialty

Psychiatry Physician

High-volume

53,104 US NPIs in this specialty

Medicare Part D claims

5,533 vs specialty avg

2023 prescription claims

Specialty avg: 1,038

Specialty distribution in Puerto Rico

How Psychiatry Physician compares to other specialties among Puerto Rico providers

Puerto Rico providers

Largest specialties in Puerto Rico (% of in-state providers)

General Practice Physician — 10%General Practice Physician10%Student in an Organized Health Care Education/Training Program — 8.9%Student in an Organized Health Care Education/Training Program8.9%Pharmacist — 8%Pharmacist8%Pharmacy Technician — 5.1%Pharmacy Technician5.1%Clinical Psychologist — 4.7%Clinical Psychologist4.7%Clinical Social Worker — 4.2%Clinical Social Worker4.2%Psychiatry Physician — 1%Psychiatry Physician1%
Largest specialties in Puerto Rico (% of in-state providers)

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).

Ericka Rivera Castro, MD appears in the CMS NPPES registry as a Psychiatry Physician provider holding MD credentials at 826 AVE MOLUCAS, San Juan, PR, 00924, with a listed phone of (787) 769-1571. NPI 1003829789 was issued on 08/14/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Rivera Castro 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 5,533 prescription claims written by this provider, covering 244 Medicare beneficiaries and totaling roughly $106K in drug spend, split <1% brand-name and >99% generic by claim count. 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

826 AVE MOLUCAS
San Juan, PR 00924

Provider Details

NPI 1003829789
Specialty Psychiatry Physician
Credentials MD
Gender Female
NPI Issued 08/14/2006

Brand vs generic prescribing mix · Generic-heavy

Ericka Rivera Castro, MD — brand share 1.0%
Psychiatry Physician average

<1% brand-name claims vs >99% generic, on 5,533 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.

5,533
Total Claims
$106K
Total Drug Cost
244
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
5,777
Total Day Supply
171,961
Brand vs Generic
<1% brand / >99% generic
Brand Drug Cost
$24K
Generic Drug Cost
$81K

Patient Demographics

Average Patient Age
66.4 years
Avg HCC Risk Score
1.80
Gender Split
68% female / 32% male
Age Distribution
<65: 103, 65-74: 82, 75-84: 43, 85+: 16

Top Prescribed Drugs (Medicare Part D)

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

What Ericka Rivera Castro, MD 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
Clonazepam
1,030
Temazepam
525
Venlafaxine Hcl Er
Venlafaxine Hcl
471
Risperidone
380
Quetiapine Fumarate
304
Estazolam
292
Buspirone Hcl
252
Sertraline Hcl
243
Bupropion Hcl Sr
Bupropion Hcl
237
Divalproex Sodium
186

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

Psychiatry Physician Overview

How Ericka Rivera Castro, MD 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

Ericka Rivera Castro, MD's 5,533 claims are above the specialty average of 1,038.

Nearby Psychiatry Physician Providers in Puerto Rico

Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as Rivera Castro.

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

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Puerto Rico medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Psychiatry Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Ericka Rivera Castro, MD's specialty?
Ericka Rivera Castro, MD specializes in Psychiatry Physician and practices in San Juan, Puerto Rico. Credentials: MD.
How much does Ericka Rivera Castro, MD prescribe under Medicare Part D?
In 2023, Ericka Rivera Castro, MD wrote 5,533 Medicare Part D claims totaling $106K in drug costs for 244 beneficiaries.
Where is Ericka Rivera Castro, MD located?
Ericka Rivera Castro, MD is located at 826 AVE MOLUCAS, San Juan, PR, 00924. Phone: (787) 769-1571.
What is Ericka Rivera Castro, MD's NPI number?
Ericka Rivera Castro, MD's National Provider Identifier (NPI) is 1003829789, issued on 08/14/2006.
Does Ericka Rivera Castro, MD prescribe more brand-name or generic drugs?
Ericka Rivera Castro, MD's prescribing is <1% brand-name and >99% generic drugs by claim count, with $24K in brand drug costs.
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 Ericka Rivera Castro, MD prescribe most often?
Based on 2023 Medicare Part D data, Ericka Rivera Castro, MD's most frequently prescribed drugs include Clonazepam, Temazepam, Venlafaxine Hcl Er. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ericka Rivera Castro, MD accept Medicare?
Ericka Rivera Castro, MD appears in CMS Medicare data with 5,533 Part D claims and 244 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ericka Rivera Castro, MD's credentials?
Ericka Rivera Castro, MD's NPI is 1003829789 with credentials MD. 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

Compiled from official public sources by the PlainDoctor editorial team.