2026 NPPES data Psychiatry Physician NPI 1336269216 M.D., PH.D
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CLAUDIA VIAMONTES, M.D., PH.D

Psychiatry Physician in ST. 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
512
Medicare Part D claims · 28 beneficiaries · Psychiatry Physician avg: 1K

What the federal data shows

CLAUDIA VIAMONTES, M.D., PH.D filed 512 Medicare Part D claims in 2023 as a Psychiatry Physician in ST. LOUIS, Missouri.

512
Part D claims, 2023

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.

CLAUDIA VIAMONTES, M.D., PH.D's Medicare Part D volume vs every U.S. prescriber

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

512 Top 34% higher than 66% 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%). This entry sits in this band. 600–800: 56,224 prescribers (4%). Above this entry. 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)

CLAUDIA VIAMONTES, M.D., PH.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 CLAUDIA VIAMONTES, M.D., PH.D?

Quality data not reported

NPI registry status

Active

Issued 04/02/2007

NPI 1336269216

Primary specialty

Psychiatry Physician

High-volume

53,104 US NPIs in this specialty

Medicare Part D claims

512 51% 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).

CLAUDIA VIAMONTES, M.D., PH.D appears in the CMS NPPES registry as a Psychiatry Physician provider holding M.D., PH.D credentials at 522 N. NEW BALLAS, ST. LOUIS, MO, 63141, with a listed phone of (314) 989-0542. NPI 1336269216 was issued on 04/02/2007. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what VIAMONTES 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 512 prescription claims written by this provider, covering 28 Medicare beneficiaries and totaling roughly $22K in drug spend. 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

522 N. NEW BALLAS
ST. LOUIS, MO 63141

Provider Details

NPI 1336269216
Specialty Psychiatry Physician
Credentials M.D., PH.D
Gender Female
NPI Issued 04/02/2007

Medicare Part D Prescribing Data

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

512
Total Claims
$22K
Total Drug Cost
28
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
512
Total Day Supply
13,493
Generic Drug Cost
$17K

Patient Demographics

Average Patient Age
56.7 years
Avg HCC Risk Score
1.07

Top Prescribed Drugs (Medicare Part D)

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

What CLAUDIA VIAMONTES, M.D., PH.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
Lorazepam
88
Quetiapine Fumarate
50
Buspirone Hcl
45
Clozapine
38
Citalopram Hbr
Citalopram Hydrobromide
25
Alprazolam
22
Clonazepam
18
Risperidone
18
Benztropine Mesylate
17
Fluoxetine Hcl
16

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

Psychiatry Physician Overview

How CLAUDIA VIAMONTES, M.D., PH.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

CLAUDIA VIAMONTES, M.D., PH.D's 512 claims are below 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 VIAMONTES.

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

Frequently Asked Questions

What is CLAUDIA VIAMONTES, M.D., PH.D's specialty?
CLAUDIA VIAMONTES, M.D., PH.D specializes in Psychiatry Physician and practices in ST. LOUIS, Missouri. Credentials: M.D., PH.D.
How much does CLAUDIA VIAMONTES, M.D., PH.D prescribe under Medicare Part D?
In 2023, CLAUDIA VIAMONTES, M.D., PH.D wrote 512 Medicare Part D claims totaling $22K in drug costs for 28 beneficiaries.
Where is CLAUDIA VIAMONTES, M.D., PH.D located?
CLAUDIA VIAMONTES, M.D., PH.D is located at 522 N. NEW BALLAS, ST. LOUIS, MO, 63141. Phone: (314) 989-0542.
What is CLAUDIA VIAMONTES, M.D., PH.D's NPI number?
CLAUDIA VIAMONTES, M.D., PH.D's National Provider Identifier (NPI) is 1336269216, issued on 04/02/2007.
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 CLAUDIA VIAMONTES, M.D., PH.D prescribe most often?
Based on 2023 Medicare Part D data, CLAUDIA VIAMONTES, M.D., PH.D's most frequently prescribed drugs include Lorazepam, Quetiapine Fumarate, Buspirone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CLAUDIA VIAMONTES, M.D., PH.D accept Medicare?
CLAUDIA VIAMONTES, M.D., PH.D appears in CMS Medicare data with 512 Part D claims and 28 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CLAUDIA VIAMONTES, M.D., PH.D's credentials?
CLAUDIA VIAMONTES, M.D., PH.D's NPI is 1336269216 with credentials M.D., PH.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