NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1144306366 MD
Verify on CMS → Mark Shermer, MD
Nephrology Physician in Memphis, 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
1K
Medicare Part D claims · 201 beneficiaries · Nephrology Physician avg: 1K
MIPS score
96.6/100
▲ 13 pts above national avg 83.1 · Exceptional
Industry payments
$130.81
7 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mark Shermer, MD reported a CMS MIPS final score of 96.6/100 - above the 83.1 national average - and filed 1,203 Medicare Part D claims in 2023.
- 96.6/100
- MIPS score · +13 vs avg
- 1K
- 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.
Mark Shermer, MD's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
97 Top 17% higher than 83% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where Mark Shermer, MD sits
This provider among nephrology physician peers
Across the 2,476 nephrology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mark Shermer, MD writes more Part D claims than 53% of them and scores higher on MIPS quality than 86% - placing this provider in the high-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one nephrology physician peer from a representative sample of 60; the gold marker is Mark Shermer, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mark Shermer, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Mark Shermer, MD?
High performer (top quartile)Primary specialty
Nephrology Physician
Medicare Part D claims
1,203 17% vs specialty avg
MIPS final score
96.6/100 13.5 pts vs avg
Specialty distribution in Tennessee
How Nephrology Physician compares to other specialties among Tennessee providers
Medicare quality performance, MIPS
Mark Shermer, MD's 2023 MIPS final score plotted against the Nephrology Physician national average
- MIPS Final Score
- 96.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Nephrology Physician) - 96.6/100 vs national avg 83.1
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).
Mark Shermer, MD appears in the CMS NPPES registry as a Nephrology Physician provider holding MD credentials at 6005 PARK AVE, Memphis, TN, 38119, with a listed phone of (901) 762-0504. NPI 1144306366 was issued on 10/31/2006.
Medicare Part D records for calendar year 2023 show 1,203 prescription claims written by this provider, covering 201 Medicare beneficiaries and totaling roughly $469K in drug spend. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 96.6/100 for the 2023 performance year (Quality 83.2), compared with the national average of 83.1.
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 | 1144306366 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/31/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
96.5958
Final Score
Avg: 83.1
83.1917
Quality
Reporting: Individual
Hospital and facility affiliations
Facilities where Mark Shermer, MD 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.
Mark Shermer, M.d.,p.c.
Memphis, 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).
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 Mark Shermer, MD. Source: openpaymentsdata.cms.gov.
Total received
$131
Largest payer
Aurinia Pharma U.S., Inc.
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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,203
Total Claims
$469K
Total Drug Cost
201
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,532
- Total Day Supply
- 74,372
- Generic Drug Cost
- $39K
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 4.12
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 40, 65-74: 72, 75-84: 63, 85+: 26
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Shermer, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Calcitriol
Calcitriol
190 claims
- Sevelamer Carbonate
Sevelamer Carbonate
125 claims
- Velphoro
Velphoro
113 claims
- Hydralazine Hcl 67
Hydralazine Hcl
67 claims
- Furosemide 58
Furosemide
58 claims
- Allopurinol 57
Allopurinol
57 claims
- Amlodipine Besylate 45
Amlodipine Besylate
45 claims
- Auryxia 32
Auryxia
32 claims
| Drug | Claims |
|---|---|
| Calcitriol | 190 |
| Sevelamer Carbonate | 125 |
| Velphoro Sucroferric Oxyhydroxide | 113 |
| Hydralazine Hcl | 67 |
| Furosemide | 58 |
| Allopurinol | 57 |
| Amlodipine Besylate | 45 |
| Auryxia Ferric Citrate | 32 |
| Clonidine Hcl | 30 |
| Farxiga Dapagliflozin Propanediol | 28 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Mark Shermer, 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
Mark Shermer, MD's 1,203 claims are below 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 Shermer.
Dr. Mazen Abu Hatab
MD
Knoxville, TN
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
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.
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Frequently Asked Questions
What is Mark Shermer, MD's specialty? ▼
Mark Shermer, MD specializes in Nephrology Physician and practices in Memphis, Tennessee. Credentials: MD.
How much does Mark Shermer, MD prescribe under Medicare Part D? ▼
In 2023, Mark Shermer, MD wrote 1,203 Medicare Part D claims totaling $469K in drug costs for 201 beneficiaries.
What is Mark Shermer, MD's Medicare quality score? ▼
Mark Shermer, MD has a CMS MIPS Final Score of 96.6/100 (Quality: 83.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mark Shermer, MD located? ▼
Mark Shermer, MD is located at 6005 PARK AVE, Memphis, TN, 38119. Phone: (901) 762-0504.
What is Mark Shermer, MD's NPI number? ▼
Mark Shermer, MD's National Provider Identifier (NPI) is 1144306366, issued on 10/31/2006.
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 Mark Shermer, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Shermer, MD's most frequently prescribed drugs include Calcitriol, Sevelamer Carbonate, Velphoro. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Shermer, MD accept Medicare? ▼
Mark Shermer, MD appears in CMS Medicare data with 1,203 Part D claims and 201 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Shermer, MD's credentials? ▼
Mark Shermer, MD's NPI is 1144306366 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.