NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1457826281
Verify on CMS → Gretta Ellis
Allergy & Immunology Physician in Tavares, Florida.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,390 in Allergy & Immunology 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
349
Medicare Part D claims · 58 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
88%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$73.61
4 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Gretta Ellis filed 349 Medicare Part D claims in 2023 as a Allergy & Immunology Physician in Tavares, Florida, prescribing 88% generic.
- 349
- Part D claims, 2023
- 88%
- generic prescribing
- $73.61
- 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.
Gretta Ellis's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
349 Top 43% higher than 57% 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-eligible specialty (heuristic, not verified)
Gretta Ellis 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 Gretta Ellis?
Quality data not reportedPrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
349 54% vs specialty avg
Specialty distribution in Florida
How Allergy & Immunology Physician compares to other specialties among Florida 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 Allergy & Immunology 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).
Gretta Ellis appears in the CMS NPPES registry as a Allergy & Immunology Physician provider at 1865 NIGHTINGALE LN STE B, Tavares, FL, 32778, with a listed phone of (352) 508-5419. NPI 1457826281 was issued on 10/08/2018.
Medicare Part D records for calendar year 2023 show 349 prescription claims written by this provider, covering 58 Medicare beneficiaries and totaling roughly $27K in drug spend, split 9% brand-name and 88% generic by claim count.
Allergy & Immunology Physician is a narrow specialty nationwide, with 3,390 enrolled providers across 52 states and an average of 764 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 | 1457826281 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Gender | Female |
| NPI Issued | 10/08/2018 |
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 Gretta Ellis. Source: openpaymentsdata.cms.gov.
Total received
$74
Largest payer
Merz Pharmaceuticals, LLC
Most common payment type
Food and Beverage
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.
License & disciplinary context - Florida FLDOH 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~75K Florida medical licensees in 2023 - they are NOT specific to Gretta Ellis. To verify Gretta Ellis's current license status, search the FLDOH public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
480
Total board actions, Florida 2023
Across 467 cases
6.40
Actions per 1,000 licensees
Florida statewide rate
monetary fine
Most common action type
138 cases
FLDOH publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Florida disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Generic-heavy
Gretta Ellis - brand share 9.0%
Allergy & Immunology Physician average
9% brand-name claims vs 88% generic, on 349 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.
349
Total Claims
$27K
Total Drug Cost
58
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 805
- Total Day Supply
- 22,903
- Brand vs Generic
- 9% brand / 88% generic
- Brand Drug Cost
- $20K
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 17
Patient Demographics
- Average Patient Age
- 72.9 years
- Avg HCC Risk Score
- 0.98
- Gender Split
- 71% female / 29% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Gretta Ellis prescribes most
Top Medicare Part D drugs by claim count, 2023
- Levothyroxine Sodium
Levothyroxine Sodium
27 claims
- Metformin Hcl
Metformin Hcl
15 claims
- Amlodipine Besylate
Amlodipine Besylate
13 claims
- Atorvastatin Calcium
Atorvastatin Calcium
11 claims
- Clonazepam
Clonazepam
11 claims
- Clotrimazole-Betam…
Clotrimazole-Betamethasone
11 claims
- Methylprednisolone
Methylprednisolone
11 claims
| Drug | Claims |
|---|---|
| Levothyroxine Sodium | 27 |
| Metformin Hcl | 15 |
| Amlodipine Besylate | 13 |
| Atorvastatin Calcium | 11 |
| Clonazepam | 11 |
| Clotrimazole-Betamethasone Clotrimazole/Betamethasone Dip | 11 |
| Methylprednisolone | 11 |
| Progesterone "Progesterone | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Allergy & Immunology Physician Overview
How Gretta Ellis fits within the Allergy & Immunology Physician landscape nationally.
3,390
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider
Gretta Ellis's 349 claims are below the specialty average of 764.
Nearby Allergy & Immunology Physician Providers in Florida
Other clinicians with the same primary specialty enrolled in Florida, drawn from the same CMS NPPES roster as Ellis.
Dr. Priya Ahya
AGACNP
Hollywood, FL
Dr. Aishah Ali
M.D
Orlando, FL
Dr. Ayman Alibrahim
M.D.
Lecanto, FL
Jaime Alvarez
Miami, FL
Dr. Harleen Anderson
MD
Maitland, FL
Compare Allergy & Immunology 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 Florida medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Allergy & Immunology 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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Frequently Asked Questions
What is Gretta Ellis's specialty? ▼
Gretta Ellis specializes in Allergy & Immunology Physician and practices in Tavares, Florida.
How much does Gretta Ellis prescribe under Medicare Part D? ▼
In 2023, Gretta Ellis wrote 349 Medicare Part D claims totaling $27K in drug costs for 58 beneficiaries.
Where is Gretta Ellis located? ▼
Gretta Ellis is located at 1865 NIGHTINGALE LN STE B, Tavares, FL, 32778. Phone: (352) 508-5419.
What is Gretta Ellis's NPI number? ▼
Gretta Ellis's National Provider Identifier (NPI) is 1457826281, issued on 10/08/2018.
Does Gretta Ellis prescribe more brand-name or generic drugs? ▼
Gretta Ellis's prescribing is 9% brand-name and 88% generic drugs by claim count, with $20K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,390 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does Gretta Ellis prescribe most often? ▼
Based on 2023 Medicare Part D data, Gretta Ellis's most frequently prescribed drugs include Levothyroxine Sodium, Metformin Hcl, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Gretta Ellis accept Medicare? ▼
Gretta Ellis appears in CMS Medicare data with 349 Part D claims and 58 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Gretta Ellis's credentials? ▼
Gretta Ellis's NPI is 1457826281. 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.