NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1487705430 MD
Verify on CMS → Jeffrey Darnall, MD
Internal Medicine Physician in Ridley Park, Pennsylvania.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 in Internal 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
726
Medicare Part D claims · 102 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
56%
generic claims · 44% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$408.04
18 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Jeffrey Darnall, MD filed 726 Medicare Part D claims in 2023 as an Internal Medicine Physician in Ridley Park, Pennsylvania, prescribing 56% generic.
- 726
- Part D claims, 2023
- 56%
- generic prescribing
- $408.04
- industry payments (Sunshine Act)
- ≥71st
- 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 1487705430 · Internal Medicine Physician
NPI-10 · ENUM-MID · TAX-MEGA · RX-LIGHT · BOOK-MID · PHOTO-ENUM
- NPI-10 1487705430
- ENUM-MID 2007
- TAX-MEGA 173K Internal Medicine
- RX-LIGHT 726
- BOOK-MID 8,542 in Pennsylvania
- PHOTO-ENUM Nicholas Boe · 2007
Jeffrey Darnall, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
726 ≥ 71st percentile 71% 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-eligible specialty (heuristic, not verified)
Jeffrey Darnall, 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 Jeffrey Darnall, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
726 73% vs specialty avg
Specialty distribution in Pennsylvania
How Internal Medicine Physician compares to other specialties among Pennsylvania 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 Internal 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 | 1487705430 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 01/16/2007 |
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 Jeffrey Darnall, MD. Source: openpaymentsdata.cms.gov.
Total received
$408
Largest payer
ViiV Healthcare Company
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.
License & disciplinary context - Pennsylvania PA-BOM 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~45K Pennsylvania medical licensees in 2023 - they are NOT specific to Jeffrey Darnall, MD. To verify Jeffrey Darnall, MD's current license status, search the PA-BOM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
133
Total board actions, Pennsylvania 2023
Across 129 cases
2.96
Actions per 1,000 licensees
Pennsylvania statewide rate
probation
Most common action type
48 cases
PA-BOM publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Pennsylvania disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Above average
Jeffrey Darnall, MD - brand share 44.0%
Internal Medicine Physician average
44% brand-name claims vs 56% generic, on 726 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.
726
Total Claims
$1.1M
Total Drug Cost
102
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 792
- Total Day Supply
- 20,531
- Brand vs Generic
- 44% brand / 56% generic
- Brand Drug Cost
- $1.0M
- Generic Drug Cost
- $55K
- Antibiotic Claims
- 200
Patient Demographics
- Average Patient Age
- 70.8 years
- Avg HCC Risk Score
- 2.46
- Gender Split
- 50% female / 50% male
- Age Distribution
- <65: 23, 65-74: 45, 75-84: 22, 85+: 12
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Jeffrey Darnall, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Biktarvy
Biktarvy
71 claims
- Tivicay
Tivicay
43 claims
- Dovato
Dovato
37 claims
- Doxycycline Hyclate
Doxycycline Hyclate
34 claims
- Sodium Chloride
Sodium Chloride
30 claims
- Azithromycin 22
Azithromycin
22 claims
- Rukobia 21
Rukobia
21 claims
- Cephalexin 20
Cephalexin
20 claims
| Drug | Claims |
|---|---|
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 71 |
| Tivicay Dolutegravir Sodium | 43 |
| Dovato Dolutegravir Sodium/Lamivudine | 37 |
| Doxycycline Hyclate | 34 |
| Sodium Chloride 0.9 % Sodium Chloride | 30 |
| Azithromycin | 22 |
| Rukobia Fostemsavir Tromethamine | 21 |
| Cephalexin | 20 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 19 |
| Vancomycin Hcl | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Jeffrey Darnall, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Jeffrey Darnall, MD's 726 claims are below the specialty average of 2,716.
Nationwide Internal Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Darnall, both outside Pennsylvania so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2007)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Internal Medicine Physician Providers in Pennsylvania
Other clinicians with the same primary specialty enrolled in Pennsylvania, drawn from the same CMS NPPES roster as Darnall.
One of 8,542 Internal Medicine Physician providers enrolled in Pennsylvania, 5 are shown here.
Dr. Erin Aakhus
M.D.
Philadelphia, PA
Dr. Muhammad Aamir
MD
Allentown, PA
Dr. Saira Aamir
MD
York, PA
Dr. John Aaron
MD
West Grove, PA
Dr. Todd Aaron
MD
Philadelphia, PA
Compare Internal Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Jeffrey Darnall, MD's specialty? ▼
Jeffrey Darnall, MD specializes in Internal Medicine Physician and practices in Ridley Park, Pennsylvania. Credentials: MD.
How much does Jeffrey Darnall, MD prescribe under Medicare Part D? ▼
In 2023, Jeffrey Darnall, MD wrote 726 Medicare Part D claims totaling $1.1M in drug costs for 102 beneficiaries.
Where is Jeffrey Darnall, MD located? ▼
Jeffrey Darnall, MD is located at 1 BARTOL AVE, Ridley Park, PA, 19078. Phone: (610) 521-3022.
What is Jeffrey Darnall, MD's NPI number? ▼
Jeffrey Darnall, MD's National Provider Identifier (NPI) is 1487705430, issued on 01/16/2007.
Does Jeffrey Darnall, MD prescribe more brand-name or generic drugs? ▼
Jeffrey Darnall, MD's prescribing is 44% brand-name and 56% generic drugs by claim count, with $1.0M in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does Jeffrey Darnall, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Jeffrey Darnall, MD's most frequently prescribed drugs include Biktarvy, Tivicay, Dovato. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Jeffrey Darnall, MD accept Medicare? ▼
Jeffrey Darnall, MD appears in CMS Medicare data with 726 Part D claims and 102 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Jeffrey Darnall, MD's credentials? ▼
Jeffrey Darnall, MD's NPI is 1487705430 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
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.