NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1699736512 MD
Verify on CMS → Mark Reichelderfer, MD
Gastroenterology Physician in Madison, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 16,567 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
280
Medicare Part D claims · 57 beneficiaries · Gastroenterology Physician avg: 833
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Mark Reichelderfer, MD filed 280 Medicare Part D claims in 2023 as a Gastroenterology Physician in Madison, Wisconsin.
- 280
- Part D claims, 2023
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 Reichelderfer, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
280 49th percentile higher than 49% 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)
Mark Reichelderfer, 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 Mark Reichelderfer, MD?
Quality data not reportedPrimary specialty
Gastroenterology Physician
Medicare Part D claims
280 66% vs specialty avg
Specialty distribution in Wisconsin
How Gastroenterology Physician compares to other specialties among Wisconsin 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 Gastroenterology 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).
Mark Reichelderfer, MD appears in the CMS NPPES registry as a Gastroenterology Physician provider holding MD credentials at 513 OZARK TRL, Madison, WI, 53705, with a listed phone of (608) 238-8235. NPI 1699736512 was issued on 03/30/2006.
Medicare Part D records for calendar year 2023 show 280 prescription claims written by this provider, covering 57 Medicare beneficiaries and totaling roughly $266K in drug spend.
Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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 | 1699736512 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/30/2006 |
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
280
Total Claims
$266K
Total Drug Cost
57
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 430
- Total Day Supply
- 11,566
- Generic Drug Cost
- $23K
- Antibiotic Claims
- 12
Patient Demographics
- Average Patient Age
- 68.2 years
- Avg HCC Risk Score
- 1.77
- Gender Split
- 70% female / 30% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Reichelderfer, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Omeprazole
Omeprazole
26 claims
- Dicyclomine Hcl
Dicyclomine Hcl
24 claims
- Balsalazide Disodium
Balsalazide Disodium
21 claims
- Loperamide
Loperamide
20 claims
- Diphenoxylate-Atro…
Diphenoxylate-Atropine
15 claims
- Ondansetron Odt
Ondansetron Odt
15 claims
- Mesalamine
Mesalamine
12 claims
- Famotidine
Famotidine
11 claims
| Drug | Claims |
|---|---|
| Omeprazole | 26 |
| Dicyclomine Hcl | 24 |
| Balsalazide Disodium | 21 |
| Loperamide Loperamide Hcl | 20 |
| Diphenoxylate-Atropine Diphenoxylate Hcl/Atropine | 15 |
| Ondansetron Odt Ondansetron | 15 |
| Mesalamine | 12 |
| Famotidine | 11 |
* 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 Reichelderfer, MD fits within the Gastroenterology Physician landscape nationally.
16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
Mark Reichelderfer, MD's 280 claims are below the specialty average of 833.
Nearby Gastroenterology Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Reichelderfer.
Dr. Frank Aberger
MD
La Crosse, WI
Dr. Aboud Affi
M.D.
Milwaukee, WI
Dr. Banke Agarwal
MD
La Crosse, WI
Dr. Parul Agarwal
M.D.
Madison, WI
Dr. Dilpesh Agrawal
M.D, MRCP
Milwaukee, WI
Compare Gastroenterology 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 Wisconsin medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gastroenterology 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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Medical Specialties Explained
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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Mark Reichelderfer, MD's specialty? ▼
Mark Reichelderfer, MD specializes in Gastroenterology Physician and practices in Madison, Wisconsin. Credentials: MD.
How much does Mark Reichelderfer, MD prescribe under Medicare Part D? ▼
In 2023, Mark Reichelderfer, MD wrote 280 Medicare Part D claims totaling $266K in drug costs for 57 beneficiaries.
Where is Mark Reichelderfer, MD located? ▼
Mark Reichelderfer, MD is located at 513 OZARK TRL, Madison, WI, 53705. Phone: (608) 238-8235.
What is Mark Reichelderfer, MD's NPI number? ▼
Mark Reichelderfer, MD's National Provider Identifier (NPI) is 1699736512, issued on 03/30/2006.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,567 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 Reichelderfer, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Reichelderfer, MD's most frequently prescribed drugs include Omeprazole, Dicyclomine Hcl, Balsalazide Disodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Reichelderfer, MD accept Medicare? ▼
Mark Reichelderfer, MD appears in CMS Medicare data with 280 Part D claims and 57 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Reichelderfer, MD's credentials? ▼
Mark Reichelderfer, MD's NPI is 1699736512 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.