NPI registry status
Active
2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1609851930 MD
Verify on CMS → David Simpson, MD
Geriatric Medicine (Family Medicine) Physician in Wilmington, Delaware.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,792 in Geriatric Medicine (Family Medicine) 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
283
Medicare Part D claims · Geriatric Medicine (Family Medicine) Physician avg: 5K
Generic prescribing
79%
generic claims · 21% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
David Simpson, MD filed 283 Medicare Part D claims in 2024 as a Geriatric Medicine (Family Medicine) Physician in Wilmington, Delaware, prescribing 79% generic.
- 283
- Part D claims, 2024
- 79%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥48th
- 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.
Federal trust snapshot
What official records show about David Simpson, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1609851930), first enumerated 12/09/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 283 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1609851930 · Geriatric Medicine (Family Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1609851930
- ENUM-LEGACY 2005
- TAX-NARROW 1,792
- RX-LIGHT 283
- BOOK-THIN 6 in Delaware
- PHOTO-ENUM Charlotte Paolini · 2005
David Simpson, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
283 ≥ 48th percentile 48% of 1,416,883 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 · 2024
✓
Board certification likely (heuristic, not verified)
David Simpson, MD 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 Simpson, MD?
Quality data not reportedPrimary specialty
Geriatric Medicine (Family Medicine) Physician
Medicare Part D claims
283 94% vs specialty avg
Specialty distribution in Delaware
How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Delaware 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 Geriatric Medicine (Family Medicine) 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 | 1609851930 |
|---|---|
| Specialty | Geriatric Medicine (Family Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/09/2005 |
Hospital and facility affiliations
Facilities where David Simpson, 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.
Christiana Care Health Services Inc
Wilmington, DE
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
David Simpson, MD - brand share 21.0%
Geriatric Medicine (Family Medicine) Physician average
21% brand-name claims vs 79% generic, on 283 2024 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 2024.
283
Total Claims
$8K
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 283.067
- Total Day Supply
- 2,073
- Brand vs Generic
- 21% brand / 79% generic
- Brand Drug Cost
- $7K
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 71.5 years
- Avg HCC Risk Score
- 1.56
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What David Simpson, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Xarelto
Xarelto
54 claims
- Hydrochlorothiazide
Hydrochlorothiazide
53 claims
- Amlodipine Besylate
Amlodipine Besylate
51 claims
- Atenolol
Atenolol
39 claims
- Simvastatin
Simvastatin
39 claims
- Mirtazapine
Mirtazapine
23 claims
- Sertraline Hcl 11
Sertraline Hcl
11 claims
| Drug | Claims |
|---|---|
| Xarelto Rivaroxaban | 54 |
| Hydrochlorothiazide | 53 |
| Amlodipine Besylate | 51 |
| Atenolol | 39 |
| Simvastatin | 39 |
| Mirtazapine | 23 |
| Sertraline Hcl | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Family Medicine) Physician in DE →
All providers in Delaware →
Compare specialties →
Geriatric Medicine (Family Medicine) Physician Overview
How David Simpson, MD fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.
1,792
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,917
Avg Claims per Provider
David Simpson, MD's 283 claims are below the specialty average of 4,917.
Nationwide Geriatric Medicine (Family Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Simpson, both outside Delaware so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Geriatric Medicine (Family Medicine) Physician Providers in Delaware
Other clinicians with the same primary specialty enrolled in Delaware, drawn from the same CMS NPPES roster as Simpson.
One of 6 Geriatric Medicine (Family Medicine) Physician providers enrolled in Delaware, 5 are shown here.
Dr. Seema Dattani
M.D.
Wilmington, DE
Dr. Marc Kattelman
D.O.
Selbyville, DE
Kulwant Klair
Newark, DE
Dr. Ina Li
M.D.
Wilmington, DE
Dr. Wayne Zwick
M.D.
Milford, DE
Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is David Simpson, MD's specialty? ▼
David Simpson, MD specializes in Geriatric Medicine (Family Medicine) Physician and practices in Wilmington, Delaware. Credentials: MD.
How much does David Simpson, MD prescribe under Medicare Part D? ▼
In 2024, David Simpson, MD wrote 283 Medicare Part D claims totaling $8K in drug costs for N/A beneficiaries.
Where is David Simpson, MD located? ▼
David Simpson, MD is located at 1401 FOULK RD, Wilmington, DE, 19803. Phone: (302) 477-3300.
What is David Simpson, MD's NPI number? ▼
David Simpson, MD's National Provider Identifier (NPI) is 1609851930, issued on 12/09/2005.
Does David Simpson, MD prescribe more brand-name or generic drugs? ▼
David Simpson, MD's prescribing is 21% brand-name and 79% generic drugs by claim count, with $7K in brand drug costs.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 1,792 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,917 Medicare Part D claims per year.
What drugs does David Simpson, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, David Simpson, MD's most frequently prescribed drugs include Xarelto, Hydrochlorothiazide, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Simpson, MD accept Medicare? ▼
David Simpson, MD appears in CMS Medicare data with 283 Part D claims and N/A Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Simpson, MD's credentials? ▼
David Simpson, MD's NPI is 1609851930 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.