NPI registry status
Active
2026 NPPES data Transplant Surgery Physician NPI 1104933878 M.D.
Verify on CMS → David Mercer, M.D.
Transplant Surgery Physician in Omaha, Nebraska.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,025 in Transplant Surgery 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
632
Medicare Part D claims · 59 beneficiaries · Transplant Surgery Physician avg: 275
Generic prescribing
67%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.1K
16 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
David Mercer, M.D. filed 632 Medicare Part D claims in 2023 as a Transplant Surgery Physician in Omaha, Nebraska, prescribing 67% generic.
- 632
- Part D claims, 2023
- 67%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥69th
- pct by Part D claim volume (lower-bound band)
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 1104933878 · Transplant Surgery Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1104933878
- ENUM-LEGACY 2006
- TAX-NARROW 1,025
- RX-LIGHT 632
- BOOK-THIN 12 in Nebraska
- PHOTO-ENUM Taqi Khan · 2006
David Mercer, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
632 ≥ 69th percentile 69% of 1,370,886 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
✓
Board certification likely (heuristic, not verified)
David Mercer, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 David Mercer, M.D.?
Quality data not reportedPrimary specialty
Transplant Surgery Physician
Medicare Part D claims
632 130% vs specialty avg
Specialty distribution in Nebraska
How Transplant Surgery Physician compares to other specialties among Nebraska 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 Transplant Surgery 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).
Practice Address
Provider Details
| NPI | 1104933878 |
|---|---|
| Specialty | Transplant Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/25/2006 |
Hospital and facility affiliations
Facilities where David Mercer, M.D. 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.
Unmc Physicians
Omaha, NE
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 David Mercer, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$2.1K
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
David Mercer, M.D. - brand share 33.0%
Transplant Surgery Physician average
33% brand-name claims vs 67% generic, on 632 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.
632
Total Claims
$1.4M
Total Drug Cost
59
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 703
- Total Day Supply
- 11,138
- Brand vs Generic
- 33% brand / 67% generic
- Brand Drug Cost
- $1.4M
- Generic Drug Cost
- $15K
- Antibiotic Claims
- 147
Patient Demographics
- Average Patient Age
- 57.1 years
- Avg HCC Risk Score
- 3.37
- Gender Split
- 73% female / 27% male
- Age Distribution
- <65: 36, 65-74: 15, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What David Mercer, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Sodium Chloride
Sodium Chloride
136 claims
- Vancomycin Hcl
Vancomycin Hcl
99 claims
- Famotidine
Famotidine
85 claims
- Gattex 29
Gattex
29 claims
- Loperamide 25
Loperamide
25 claims
- Pantoprazole Sodium 20
Pantoprazole Sodium
20 claims
- Ondansetron Odt 18
Ondansetron Odt
18 claims
- Metronidazole 16
Metronidazole
16 claims
| Drug | Claims |
|---|---|
| Sodium Chloride 0.9 % Sodium Chloride | 136 |
| Vancomycin Hcl | 99 |
| Famotidine | 85 |
| Gattex Teduglutide | 29 |
| Loperamide Loperamide Hcl | 25 |
| Pantoprazole Sodium | 20 |
| Ondansetron Odt Ondansetron | 18 |
| Metronidazole | 16 |
| Omeprazole | 15 |
| Prevalite Cholestyramine/Aspartame | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Transplant Surgery Physician Overview
How David Mercer, M.D. fits within the Transplant Surgery Physician landscape nationally.
1,025
Transplant Surgery Physician Providers in US
48
States with Transplant Surgery Physician
275
Avg Claims per Provider
David Mercer, M.D.'s 632 claims are above the specialty average of 275.
Nationwide Transplant Surgery Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Mercer, both outside Nebraska so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Transplant Surgery Physician Providers in Nebraska
Other clinicians with the same primary specialty enrolled in Nebraska, drawn from the same CMS NPPES roster as Mercer.
One of 12 Transplant Surgery Physician providers enrolled in Nebraska, 5 are shown here.
Dr. Nkechi Arinze
MD
Omaha, NE
Dr. Omer Eltahir
M.D.
Omaha, NE
Dr. Wendy Grant
MD
Omaha, NE
Dr. Alan Langnas
DO
Omaha, NE
Dr. Alexander Maskin
MD
Omaha, NE
Compare Transplant Surgery Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is David Mercer, M.D.'s specialty? ▼
David Mercer, M.D. specializes in Transplant Surgery Physician and practices in Omaha, Nebraska. Credentials: M.D..
How much does David Mercer, M.D. prescribe under Medicare Part D? ▼
In 2023, David Mercer, M.D. wrote 632 Medicare Part D claims totaling $1.4M in drug costs for 59 beneficiaries.
Where is David Mercer, M.D. located? ▼
David Mercer, M.D. is located at 988102 NEBRASKA MEDICAL CTR, Omaha, NE, 68198. Phone: (402) 559-5000.
What is David Mercer, M.D.'s NPI number? ▼
David Mercer, M.D.'s National Provider Identifier (NPI) is 1104933878, issued on 08/25/2006.
Does David Mercer, M.D. prescribe more brand-name or generic drugs? ▼
David Mercer, M.D.'s prescribing is 33% brand-name and 67% generic drugs by claim count, with $1.4M in brand drug costs.
How many Transplant Surgery Physician providers are there in the US? ▼
There are 1,025 Transplant Surgery Physician providers across 48 states in the US. The average Transplant Surgery Physician provider writes 275 Medicare Part D claims per year.
What drugs does David Mercer, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, David Mercer, M.D.'s most frequently prescribed drugs include Sodium Chloride, Vancomycin Hcl, Famotidine. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Mercer, M.D. accept Medicare? ▼
David Mercer, M.D. appears in CMS Medicare data with 632 Part D claims and 59 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Mercer, M.D.'s credentials? ▼
David Mercer, M.D.'s NPI is 1104933878 with credentials M.D.. 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
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.