2026 NPPES data Psychiatry Physician NPI 1831110618 MD PHD
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LUIS GIUFFRA, MD PHD

Psychiatry Physician in SAINT LOUIS, Missouri. 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
5K
Medicare Part D claims · 274 beneficiaries · Psychiatry Physician avg: 1K
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

LUIS GIUFFRA, MD PHD filed 4,865 Medicare Part D claims in 2023 as a Psychiatry Physician in SAINT LOUIS, Missouri, prescribing 90% generic.

5K
Part D claims, 2023
90%
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.

LUIS GIUFFRA, MD PHD's Medicare Part D volume vs every U.S. prescriber

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

4,865 Top 7% higher than 93% 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)

LUIS GIUFFRA, MD PHD 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 LUIS GIUFFRA, MD PHD?

Quality data not reported

NPI registry status

Active

Issued 07/21/2006

NPI 1831110618

Primary specialty

Psychiatry Physician

High-volume

53,104 US NPIs in this specialty

Medicare Part D claims

4,865 369% vs specialty avg

2023 prescription claims

Specialty avg: 1,038

Specialty distribution in Missouri

How Psychiatry Physician compares to other specialties among Missouri providers

Missouri providers

Psychiatry Physician share within Missouri

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

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).

LUIS GIUFFRA, MD PHD is a Psychiatry Physician provider practicing in SAINT LOUIS, Missouri, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD PHD. NPI: 1831110618. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

LUIS GIUFFRA, MD PHD appears in the CMS NPPES registry as a Psychiatry Physician provider holding MD PHD credentials at 9890 CLAYTON RD, SAINT LOUIS, MO, 63124, with a listed phone of (314) 725-1515. NPI 1831110618 was issued on 07/21/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what GIUFFRA 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 4,865 prescription claims written by this provider, covering 274 Medicare beneficiaries and totaling roughly $646K in drug spend, split 10% brand-name and 90% 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

9890 CLAYTON RD
SAINT LOUIS, MO 63124

Provider Details

NPI 1831110618
Specialty Psychiatry Physician
Credentials MD PHD
Gender Male
NPI Issued 07/21/2006

Brand vs generic prescribing mix · Typical

LUIS GIUFFRA, MD PHD — brand share 10.0%
Specialty average (est.)

10% brand-name claims vs 90% generic, on 4,865 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.

4,865
Total Claims
$646K
Total Drug Cost
274
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
6,823
Total Day Supply
202,661
Brand vs Generic
10% brand / 90% generic
Brand Drug Cost
$494K
Generic Drug Cost
$152K

Patient Demographics

Average Patient Age
69.7 years
Avg HCC Risk Score
1.02
Gender Split
56% female / 44% male
Age Distribution
<65: 47, 65-74: 146, 75-84: 66, 85+: 15

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Quetiapine Fumarate
259
Duloxetine Hcl
258
Lamotrigine
219
Clonazepam
217
Alprazolam
210
Trazodone Hcl
188
Lorazepam
183
Sertraline Hcl
169
Olanzapine
164
Mirtazapine
148

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

Psychiatry Physician Overview

How LUIS GIUFFRA, MD PHD 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

LUIS GIUFFRA, MD PHD's 4,865 claims are above the specialty average of 1,038.

Nearby Psychiatry Physician Providers in Missouri

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

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

Frequently Asked Questions

What is LUIS GIUFFRA, MD PHD's specialty?
LUIS GIUFFRA, MD PHD specializes in Psychiatry Physician and practices in SAINT LOUIS, Missouri. Credentials: MD PHD.
How much does LUIS GIUFFRA, MD PHD prescribe under Medicare Part D?
In 2023, LUIS GIUFFRA, MD PHD wrote 4,865 Medicare Part D claims totaling $646K in drug costs for 274 beneficiaries.
Where is LUIS GIUFFRA, MD PHD located?
LUIS GIUFFRA, MD PHD is located at 9890 CLAYTON RD, SAINT LOUIS, MO, 63124. Phone: (314) 725-1515.
What is LUIS GIUFFRA, MD PHD's NPI number?
LUIS GIUFFRA, MD PHD's National Provider Identifier (NPI) is 1831110618, issued on 07/21/2006.
Does LUIS GIUFFRA, MD PHD prescribe more brand-name or generic drugs?
LUIS GIUFFRA, MD PHD's prescribing is 10% brand-name and 90% generic drugs by claim count, with $494K 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 LUIS GIUFFRA, MD PHD prescribe most often?
Based on 2023 Medicare Part D data, LUIS GIUFFRA, MD PHD's most frequently prescribed drugs include Quetiapine Fumarate, Duloxetine Hcl, Lamotrigine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LUIS GIUFFRA, MD PHD accept Medicare?
LUIS GIUFFRA, MD PHD appears in CMS Medicare data with 4,865 Part D claims and 274 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LUIS GIUFFRA, MD PHD's credentials?
LUIS GIUFFRA, MD PHD's NPI is 1831110618 with credentials MD PHD. 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