NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1639161862 MD
Verify on CMS → David Sappenfield, MD
Ophthalmology Physician in Durham, North Carolina.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 22,090 in Ophthalmology 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
956
Medicare Part D claims · 183 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
53%
generic claims · 47% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
David Sappenfield, MD filed 956 Medicare Part D claims in 2023 as a Ophthalmology Physician in Durham, North Carolina, prescribing 53% generic.
- 956
- Part D claims, 2023
- 53%
- generic prescribing
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.
David Sappenfield, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
956 Top 25% higher than 75% 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)
David Sappenfield, 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 David Sappenfield, MD?
Quality data not reportedPrimary specialty
Ophthalmology Physician
Medicare Part D claims
956 33% vs specialty avg
Specialty distribution in North Carolina
How Ophthalmology Physician compares to other specialties among North Carolina 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 Ophthalmology 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).
David Sappenfield, MD appears in the CMS NPPES registry as a Ophthalmology Physician provider holding MD credentials at 4102 N ROXBORO ST, Durham, NC, 27704, with a listed phone of (919) 595-2000. NPI 1639161862 was issued on 08/15/2005.
Medicare Part D records for calendar year 2023 show 956 prescription claims written by this provider, covering 183 Medicare beneficiaries and totaling roughly $109K in drug spend, split 47% brand-name and 53% generic by claim count.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 enrolled providers across 56 states and an average of 1,420 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 | 1639161862 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/15/2005 |
Brand vs generic prescribing mix · Above average
David Sappenfield, MD - brand share 47.0%
Ophthalmology Physician average
47% brand-name claims vs 53% generic, on 956 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.
956
Total Claims
$109K
Total Drug Cost
183
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,655
- Total Day Supply
- 47,954
- Brand vs Generic
- 47% brand / 53% generic
- Brand Drug Cost
- $88K
- Generic Drug Cost
- $21K
Patient Demographics
- Average Patient Age
- 78.1 years
- Avg HCC Risk Score
- 1.96
- Gender Split
- 61% female / 39% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What David Sappenfield, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
285 claims
- Prednisolone Acetate
Prednisolone Acetate
166 claims
- Brimonidine Tartrate 87
Brimonidine Tartrate
87 claims
- Dorzolamide-Timolol 77
Dorzolamide-Timolol
77 claims
- Timolol Maleate 46
Timolol Maleate
46 claims
- Restasis 28
Restasis
28 claims
- Ketorolac Trometha… 26
Ketorolac Tromethamine
26 claims
- Brimonidine Tartra… 23
Brimonidine Tartrate-Timolol
23 claims
| Drug | Claims |
|---|---|
| Latanoprost | 285 |
| Prednisolone Acetate | 166 |
| Brimonidine Tartrate | 87 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 77 |
| Timolol Maleate | 46 |
| Restasis Cyclosporine | 28 |
| Ketorolac Tromethamine | 26 |
| Brimonidine Tartrate-Timolol Brimonidine Tartrate/Timolol | 23 |
| Atropine Sulfate | 22 |
| Rhopressa Netarsudil Mesylate | 20 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How David Sappenfield, MD fits within the Ophthalmology Physician landscape nationally.
22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
David Sappenfield, MD's 956 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in North Carolina
Other clinicians with the same primary specialty enrolled in North Carolina, drawn from the same CMS NPPES roster as Sappenfield.
Dr. Brian Adair
M.D.
Hickory, NC
Dr. Lindsay Adam
M.D.
Raleigh, NC
Modupe Adetunji
Durham, NC
Dr. Richard Akers
M.D.
Gastonia, NC
Dr. Richard Akers
M.D.
Morganton, NC
Compare Ophthalmology 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 North Carolina medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ophthalmology 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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Frequently Asked Questions
What is David Sappenfield, MD's specialty? ▼
David Sappenfield, MD specializes in Ophthalmology Physician and practices in Durham, North Carolina. Credentials: MD.
How much does David Sappenfield, MD prescribe under Medicare Part D? ▼
In 2023, David Sappenfield, MD wrote 956 Medicare Part D claims totaling $109K in drug costs for 183 beneficiaries.
Where is David Sappenfield, MD located? ▼
David Sappenfield, MD is located at 4102 N ROXBORO ST, Durham, NC, 27704. Phone: (919) 595-2000.
What is David Sappenfield, MD's NPI number? ▼
David Sappenfield, MD's National Provider Identifier (NPI) is 1639161862, issued on 08/15/2005.
Does David Sappenfield, MD prescribe more brand-name or generic drugs? ▼
David Sappenfield, MD's prescribing is 47% brand-name and 53% generic drugs by claim count, with $88K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does David Sappenfield, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, David Sappenfield, MD's most frequently prescribed drugs include Latanoprost, Prednisolone Acetate, Brimonidine Tartrate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Sappenfield, MD accept Medicare? ▼
David Sappenfield, MD appears in CMS Medicare data with 956 Part D claims and 183 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Sappenfield, MD's credentials? ▼
David Sappenfield, MD's NPI is 1639161862 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.