2026 NPPES data Clinical & Laboratory Immunology (Allergy & Immunology) Physician NPI 1639599806 MBBS
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SIMON MALLAL, MBBS

Clinical & Laboratory Immunology (Allergy & Immunology) Physician in NASHVILLE, Tennessee. 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.
Industry payments
$6.3K
10 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

SIMON MALLAL, MBBS is a Clinical & Laboratory Immunology (Allergy & Immunology) Physician in NASHVILLE, Tennessee, listed in the federal CMS National Provider Identifier registry.

$6.3K
industry payments (Sunshine Act)

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.

Board-eligible specialty (heuristic — not verified)

SIMON MALLAL, MBBS 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 SIMON MALLAL, MBBS?

Quality data not reported

NPI registry status

Active

Issued 04/25/2014

NPI 1639599806

Primary specialty

Clinical & Laboratory Immunology (Allergy & Immunology) Physician

Rare

97 US NPIs in this specialty

Specialty distribution in Tennessee

How Clinical & Laboratory Immunology (Allergy & Immunology) Physician compares to other specialties among Tennessee providers

Tennessee providers

Clinical & Laboratory Immunology (Allergy & Immunology) Physician share within Tennessee

1. Clinical & Laboratory Immunology (Allergy & Immunology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Clinical & Laboratory Immunology (Allergy & Immunology) Physician share within Tennessee

Specialty board-certification context

Estimated specialty board-certified rate — Clinical & Laboratory Immunology (Allergy & Immunology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Clinical & Laboratory Immunology (Allergy & Immunology) Physician ABMS/AOA estimate

Est. board-certified rate (Clinical & Laboratory Immunology (Allergy & Immunology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Clinical & Laboratory Immunology (Allergy & Immunology) 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).

SIMON MALLAL, MBBS appears in the CMS NPPES registry as a Clinical & Laboratory Immunology (Allergy & Immunology) Physician provider holding MBBS credentials at 1161 21ST AVE S, NASHVILLE, TN, 37232, with a listed phone of (615) 322-2035. NPI 1639599806 was issued on 04/25/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MALLAL 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 prescribing data is not currently published for this NPI, which typically means the provider either wrote fewer than 11 Part D claims in the most recent reporting year, does not participate in Medicare, or practices in a specialty that rarely prescribes outpatient drugs. Absence of prescribing data is not a quality signal — many Clinical & Laboratory Immunology (Allergy & Immunology) Physician providers operate outside Part D entirely.

Clinical & Laboratory Immunology (Allergy & Immunology) Physician is a narrow specialty nationwide, with 97 enrolled providers across 29 states and an average of 701 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

1161 21ST AVE S
NASHVILLE, TN 37232

Provider Details

NPI 1639599806
Specialty Clinical & Laboratory Immunology (Allergy & Immunology) Physician
Credentials MBBS
Gender Male
NPI Issued 04/25/2014

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for SIMON MALLAL, MBBS. Source: openpaymentsdata.cms.gov.

Total received

$6.3K

Largest payer

Merck Sharp & Dohme LLC

Most common payment type

Travel and Lodging

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

Clinical & Laboratory Immunology (Allergy & Immunology) Physician Overview

How SIMON MALLAL, MBBS fits within the Clinical & Laboratory Immunology (Allergy & Immunology) Physician landscape nationally.

97
Clinical & Laboratory Immunology (Allergy & Immunology) Physician Providers in US
29
States with Clinical & Laboratory Immunology (Allergy & Immunology) Physician
701
Avg Claims per Provider

Frequently Asked Questions

What is SIMON MALLAL, MBBS's specialty?
SIMON MALLAL, MBBS specializes in Clinical & Laboratory Immunology (Allergy & Immunology) Physician and practices in NASHVILLE, Tennessee. Credentials: MBBS.
Where is SIMON MALLAL, MBBS located?
SIMON MALLAL, MBBS is located at 1161 21ST AVE S, NASHVILLE, TN, 37232. Phone: (615) 322-2035.
What is SIMON MALLAL, MBBS's NPI number?
SIMON MALLAL, MBBS's National Provider Identifier (NPI) is 1639599806, issued on 04/25/2014.
How many Clinical & Laboratory Immunology (Allergy & Immunology) Physician providers are there in the US?
There are 97 Clinical & Laboratory Immunology (Allergy & Immunology) Physician providers across 29 states in the US. The average Clinical & Laboratory Immunology (Allergy & Immunology) Physician provider writes 701 Medicare Part D claims per year.
Does SIMON MALLAL, MBBS accept Medicare?
SIMON MALLAL, MBBS appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify SIMON MALLAL, MBBS's credentials?
SIMON MALLAL, MBBS's NPI is 1639599806 with credentials MBBS. 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.
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