NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1821173121 MD
Verify on CMS → Mazen Abu Hatab, MD
Nephrology Physician in Knoxville, 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 10,534 in Nephrology 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
2K
Medicare Part D claims · 188 beneficiaries · Nephrology Physician avg: 1K
Generic prescribing
95%
generic claims · 5% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$28.27
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
Mazen Abu Hatab, MD filed 2,097 Medicare Part D claims in 2023 as a Nephrology Physician in Knoxville, Tennessee, prescribing 95% generic.
- 2K
- Part D claims, 2023
- 95%
- generic prescribing
- $28.27
- 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.
Mazen Abu Hatab, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,097 Top 16% higher than 84% 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)
Mazen Abu Hatab, MD 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 Mazen Abu Hatab, MD?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
2,097 44% vs specialty avg
Specialty distribution in Tennessee
How Nephrology 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 Nephrology 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).
Mazen Abu Hatab, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 8044 RAY MEARS BLVD, Knoxville, TN, 37919, with a listed phone of (865) 692-9111. NPI 1821173121 was issued on 10/26/2006.
Medicare Part D records for calendar year 2023 show 2,097 prescription claims written by this provider, covering 188 Medicare beneficiaries and totaling roughly $89K in drug spend, split 5% brand-name and 95% generic by claim count.
Nephrology Physician is a mid-sized specialty nationwide, with 10,534 enrolled providers across 55 states and an average of 1,454 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 | 1821173121 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/26/2006 |
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 Mazen Abu Hatab, MD. Source: openpaymentsdata.cms.gov.
Total received
$28
Largest payer
Travere Therapeutics, Inc.
Most common payment type
Education
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.
Brand vs generic prescribing mix · Generic-heavy
Mazen Abu Hatab, MD - brand share 5.0%
Nephrology Physician average
5% brand-name claims vs 95% generic, on 2,097 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.
2,097
Total Claims
$89K
Total Drug Cost
188
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 4,895
- Total Day Supply
- 145,012
- Brand vs Generic
- 5% brand / 95% generic
- Brand Drug Cost
- $33K
- Generic Drug Cost
- $57K
- Antibiotic Claims
- 40
Patient Demographics
- Average Patient Age
- 77.2 years
- Avg HCC Risk Score
- 2.65
- Gender Split
- 60% female / 40% male
- Age Distribution
- <65: 11, 65-74: 62, 75-84: 75, 85+: 40
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mazen Abu Hatab, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Amlodipine Besylate
Amlodipine Besylate
197 claims
- Furosemide
Furosemide
180 claims
- Calcitriol
Calcitriol
175 claims
- Hydralazine Hcl
Hydralazine Hcl
168 claims
- Potassium Chloride
Potassium Chloride
139 claims
- Bumetanide
Bumetanide
135 claims
- Allopurinol
Allopurinol
114 claims
- Losartan Potassium
Losartan Potassium
111 claims
| Drug | Claims |
|---|---|
| Amlodipine Besylate | 197 |
| Furosemide | 180 |
| Calcitriol | 175 |
| Hydralazine Hcl | 168 |
| Potassium Chloride | 139 |
| Bumetanide | 135 |
| Allopurinol | 114 |
| Losartan Potassium | 111 |
| Carvedilol | 88 |
| Tamsulosin Hcl | 77 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Mazen Abu Hatab, MD fits within the Nephrology Physician landscape nationally.
10,534
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Mazen Abu Hatab, MD's 2,097 claims are above the specialty average of 1,454.
Nearby Nephrology Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Abu Hatab.
Dr. Wala Abusalah
MD
Knoxville, TN
Dr. Abrar Ahmad
M.D.
Kingsport, TN
Dr. Mohammed Ahmed
M.D.
Morristown, TN
Dr. Siddique Akbar
MD
Jackson, TN
Dr. Zaher Al-Shallah
MD
Germantown, TN
Compare Nephrology 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 Nephrology 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Tennessee
Frequently Asked Questions
What is Mazen Abu Hatab, MD's specialty? ▼
Mazen Abu Hatab, MD specializes in Nephrology Physician and practices in Knoxville, Tennessee. Credentials: MD.
How much does Mazen Abu Hatab, MD prescribe under Medicare Part D? ▼
In 2023, Mazen Abu Hatab, MD wrote 2,097 Medicare Part D claims totaling $89K in drug costs for 188 beneficiaries.
Where is Mazen Abu Hatab, MD located? ▼
Mazen Abu Hatab, MD is located at 8044 RAY MEARS BLVD, Knoxville, TN, 37919. Phone: (865) 692-9111.
What is Mazen Abu Hatab, MD's NPI number? ▼
Mazen Abu Hatab, MD's National Provider Identifier (NPI) is 1821173121, issued on 10/26/2006.
Does Mazen Abu Hatab, MD prescribe more brand-name or generic drugs? ▼
Mazen Abu Hatab, MD's prescribing is 5% brand-name and 95% generic drugs by claim count, with $33K in brand drug costs.
How many Nephrology Physician providers are there in the US? ▼
There are 10,534 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Mazen Abu Hatab, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mazen Abu Hatab, MD's most frequently prescribed drugs include Amlodipine Besylate, Furosemide, Calcitriol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mazen Abu Hatab, MD accept Medicare? ▼
Mazen Abu Hatab, MD appears in CMS Medicare data with 2,097 Part D claims and 188 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mazen Abu Hatab, MD's credentials? ▼
Mazen Abu Hatab, MD's NPI is 1821173121 with credentials MD. 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.