NPI registry status
Active
2026 NPPES data Psychiatry Physician NPI 1346869369 DO
Verify on CMS → Nathaniel Allen-Slaba, DO
Psychiatry Physician in Nashville, Tennessee.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 53,171 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
450
Medicare Part D claims · 61 beneficiaries · Psychiatry Physician avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Nathaniel Allen-Slaba, DO filed 450 Medicare Part D claims in 2023 as a Psychiatry Physician in Nashville, Tennessee.
- 450
- Part D claims, 2023
- Likely
- board-certified (heuristic)
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.
Nathaniel Allen-Slaba, DO's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
450 Top 38% higher than 62% of 1,370,886 prescribers
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 certification likely (heuristic, not verified)
Nathaniel Allen-Slaba, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Nathaniel Allen-Slaba, DO?
Quality data not reportedPrimary specialty
Psychiatry Physician
Medicare Part D claims
450 57% vs specialty avg
Specialty distribution in Tennessee
How Psychiatry Physician compares to other specialties among Tennessee providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Psychiatry Physician. Verify directly:
How MIPS and board certification work
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).
Nathaniel Allen-Slaba, DO appears in the CMS NPPES registry as a Psychiatry Physician provider holding DO credentials at 1601 23RD AVE S STE 3105, Nashville, TN, 37212, with a listed phone of (615) 327-7119. NPI 1346869369 was issued on 04/09/2020.
Medicare Part D records for calendar year 2023 show 450 prescription claims written by this provider, covering 61 Medicare beneficiaries and totaling roughly $39K in drug spend.
Psychiatry Physician is a high-volume specialty nationwide, with 53,171 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
Provider Details
| NPI | 1346869369 |
|---|---|
| Specialty | Psychiatry Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 04/09/2020 |
Hospital and facility affiliations
Facilities where Nathaniel Allen-Slaba, DO bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
River Region Psychiatry Associates, LLC
Nashville, TN
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
450
Total Claims
$39K
Total Drug Cost
61
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 727
- Total Day Supply
- 21,143
- Generic Drug Cost
- $20K
Patient Demographics
- Average Patient Age
- 65.5 years
- Avg HCC Risk Score
- 1.81
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 19, 65-74: 24, 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 Nathaniel Allen-Slaba, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Quetiapine Fumarate
Quetiapine Fumarate
25 claims
- Bupropion Xl
Bupropion Xl
24 claims
- Sertraline Hcl
Sertraline Hcl
23 claims
- Clozapine
Clozapine
22 claims
- Trazodone Hcl
Trazodone Hcl
21 claims
- Venlafaxine Hcl Er
Venlafaxine Hcl Er
21 claims
- Olanzapine
Olanzapine
20 claims
- Mirtazapine
Mirtazapine
19 claims
| Drug | Claims |
|---|---|
| Quetiapine Fumarate | 25 |
| Bupropion Xl Bupropion Hcl | 24 |
| Sertraline Hcl | 23 |
| Clozapine | 22 |
| Trazodone Hcl | 21 |
| Venlafaxine Hcl Er Venlafaxine Hcl | 21 |
| Olanzapine | 20 |
| Mirtazapine | 19 |
| Buprenorphine-Naloxone Buprenorphine Hcl/Naloxone Hcl | 17 |
| Prazosin 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 Nathaniel Allen-Slaba, DO fits within the Psychiatry Physician landscape nationally.
53,171
Psychiatry Physician Providers in US
56
States with Psychiatry Physician
1,038
Avg Claims per Provider
Nathaniel Allen-Slaba, DO's 450 claims are below the specialty average of 1,038.
Nearby Psychiatry Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Allen-Slaba.
Soureya Abbo
Clarksville, TN
Dr. Amanda Actor
MD
Nashville, TN
Dr. Lori Adelson
MD
Nashville, TN
Dr. Felix Adetunji
MD
Goodlettsville, TN
Dr. Saleh Ahmad
MD
Murfreesboro, TN
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 Tennessee 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.
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Medical Specialties Explained
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Frequently Asked Questions
What is Nathaniel Allen-Slaba, DO's specialty? ▼
Nathaniel Allen-Slaba, DO specializes in Psychiatry Physician and practices in Nashville, Tennessee. Credentials: DO.
How much does Nathaniel Allen-Slaba, DO prescribe under Medicare Part D? ▼
In 2023, Nathaniel Allen-Slaba, DO wrote 450 Medicare Part D claims totaling $39K in drug costs for 61 beneficiaries.
Where is Nathaniel Allen-Slaba, DO located? ▼
Nathaniel Allen-Slaba, DO is located at 1601 23RD AVE S STE 3105, Nashville, TN, 37212. Phone: (615) 327-7119.
What is Nathaniel Allen-Slaba, DO's NPI number? ▼
Nathaniel Allen-Slaba, DO's National Provider Identifier (NPI) is 1346869369, issued on 04/09/2020.
How many Psychiatry Physician providers are there in the US? ▼
There are 53,171 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 Nathaniel Allen-Slaba, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Nathaniel Allen-Slaba, DO's most frequently prescribed drugs include Quetiapine Fumarate, Bupropion Xl, Sertraline Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Nathaniel Allen-Slaba, DO accept Medicare? ▼
Nathaniel Allen-Slaba, DO appears in CMS Medicare data with 450 Part D claims and 61 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Nathaniel Allen-Slaba, DO's credentials? ▼
Nathaniel Allen-Slaba, DO's NPI is 1346869369 with credentials DO. 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
View source datasets and methodology notes
- 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.