NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1003993163 MD
Verify on CMS → Mark Anderson, MD
Gastroenterology 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 16,601 in Gastroenterology 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
92
Medicare Part D claims · 64 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
62%
generic claims · 38% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
89.6/100
▲ 6 pts above national avg 83.5 · Exceptional
Industry payments
$102.82
5 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Mark Anderson, MD reported a CMS MIPS final score of 89.6/100 - above the 83.5 national average - and filed 92 Medicare Part D claims in 2023.
- 89.6/100
- MIPS score · +6 vs avg
- 92
- Part D claims, 2023
- 62%
- generic prescribing
- 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.
CMS NPPES provider registry desk
NPI 1003993163 · Gastroenterology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · MIPS-ABOVE · RX-TRACE · BOOK-THIN · PHOTO-FINISH
- NPI-10 1003993163
- ENUM-LEGACY 2006
- TAX-MID 17K Gastroenterology Physician
- MIPS-ABOVE 89.6/100
- RX-TRACE 92
- BOOK-THIN 324 in Tennessee
- PHOTO-FINISH John Clements · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Anderson · this …
Anderson · this provider
89.6 MIPS pts
- William Hallmon …
William Hallmon
89.6 MIPS pts
- John Clements · …
John Clements
89.6 MIPS pts
- Patrick Dorvilus…
Patrick Dorvilus
89.6 MIPS pts
- Carl Foulks · near
Carl Foulks
89.6 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Mark Anderson, MD's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
90 ≥ 56th percentile 56% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured 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.
The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Mark Anderson, MD sits
This provider among gastroenterology physician peers
Across the 5,560 gastroenterology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mark Anderson, MD writes more Part D claims than 8% of them and scores higher on MIPS quality than 60% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one gastroenterology physician peer from a representative sample of 60; the gold marker is Mark Anderson, MD. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mark Anderson, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 5 hospital affiliations - 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 Anderson, MD?
High performer (top quartile)Primary specialty
Gastroenterology Physician
Medicare Part D claims
92 89% vs specialty avg
MIPS final score
89.6/100 6.1 pts vs avg
Specialty distribution in Tennessee
How Gastroenterology Physician compares to other specialties among Tennessee providers
Medicare quality performance, MIPS
Mark Anderson, MD's 2023 MIPS final score plotted against the Gastroenterology Physician national average
- MIPS Final Score
- 89.6/100
- vs 83.5 national avg · 2023 performance year
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).
Practice Address
Provider Details
| NPI | 1003993163 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/01/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
89.6389
Final Score
Measured-score avg: 83.5
77.663
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Mark Anderson, 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.
According to CMS billing records, Mark Anderson, MD is affiliated with 5 Medicare-billing facilities across 4 states.
Baptist Health Medical Group Inc
Paducah, KY
Ferrell Hospital Community Foundation
Eldorado, IL
Knoxville Hma Physician Management, LLC
Knoxville, TN
Monument Health Rapid City Hospital Inc
Rapid City, SD
Southern Illinois Medical Services Nfp
Herrin, IL
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 Anderson, MD. Source: openpaymentsdata.cms.gov.
Total received
$103
Largest payer
Takeda Pharmaceuticals U.S.A., 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.
Brand vs generic prescribing mix · Above average
Mark Anderson, MD - brand share 38.0%
Gastroenterology Physician average
38% brand-name claims vs 62% generic, on 92 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.
92
Total Claims
$118K
Total Drug Cost
64
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 106
- Total Day Supply
- 1,583
- Brand vs Generic
- 38% brand / 62% generic
- Brand Drug Cost
- $116K
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 69.0 years
- Avg HCC Risk Score
- 1.00
- Gender Split
- 53% female / 47% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Genvoya Elviteg/Cob/Emtri/Tenof Alafen | 24 |
| Gavilyte-G "Peg3350/Sod Sulf | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How Mark Anderson, MD fits within the Gastroenterology Physician landscape nationally.
16,601
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
Mark Anderson, MD's 92 claims are below the specialty average of 833.
Nationwide Gastroenterology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Anderson, both outside Tennessee so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (89.6 here).
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Gastroenterology Physician Providers in Tennessee
Other clinicians with the same primary specialty enrolled in Tennessee, drawn from the same CMS NPPES roster as Anderson.
One of 324 Gastroenterology Physician providers enrolled in Tennessee, 5 are shown here.
Dr. Ahmad Abu-Heija
M.D.
Oak Ridge, TN
Dr. Linas Adams
MD
Morristown, TN
Dr. Uchenna Agbim
MD
Memphis, TN
Dr. Nazneen Ahmed
M.D.
Memphis, TN
Dr. Abdullah Al-Rashdan
M.D.
Memphis, TN
Compare Gastroenterology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Mark Anderson, MD's specialty? ▼
Mark Anderson, MD specializes in Gastroenterology Physician and practices in Knoxville, Tennessee. Credentials: MD.
How much does Mark Anderson, MD prescribe under Medicare Part D? ▼
In 2023, Mark Anderson, MD wrote 92 Medicare Part D claims totaling $118K in drug costs for 64 beneficiaries.
What is Mark Anderson, MD's Medicare quality score? ▼
Mark Anderson, MD has a CMS MIPS Final Score of 89.6/100 (Quality: 77.7). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mark Anderson, MD located? ▼
Mark Anderson, MD is located at 1928 ALCOA HWY, Knoxville, TN, 37920. Phone: (865) 544-6570.
What is Mark Anderson, MD's NPI number? ▼
Mark Anderson, MD's National Provider Identifier (NPI) is 1003993163, issued on 11/01/2006.
Does Mark Anderson, MD prescribe more brand-name or generic drugs? ▼
Mark Anderson, MD's prescribing is 38% brand-name and 62% generic drugs by claim count, with $116K in brand drug costs.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,601 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does Mark Anderson, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Anderson, MD's most frequently prescribed drugs include Genvoya, Gavilyte-G. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Anderson, MD accept Medicare? ▼
Mark Anderson, MD appears in CMS Medicare data with 92 Part D claims and 64 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Anderson, MD's credentials? ▼
Mark Anderson, MD's NPI is 1003993163 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
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.