NPI registry status
Active
2026 NPPES data Retina Specialist (Ophthalmology) Physician NPI 1083854699 M.D.
Verify on CMS → David Pan, M.D.
Retina Specialist (Ophthalmology) Physician in Harrisonburg, Virginia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 983 in Retina Specialist (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
124
Medicare Part D claims · 39 beneficiaries · Retina Specialist (Ophthalmology) Physician avg: 593
Generic prescribing
72%
generic claims · 28% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$13.12
1 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
David Pan, M.D. filed 124 Medicare Part D claims in 2024 as a Retina Specialist (Ophthalmology) Physician in Harrisonburg, Virginia, prescribing 72% generic.
- 124
- Part D claims, 2024
- 72%
- generic prescribing
- $13.12
- industry payments (Sunshine Act)
- ≥34th
- 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 Pan, M.D.
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 1083854699), first enumerated 02/23/2009.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 124 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
Practices in an ABMS-board-eligible specialty; board certification not confirmed in federal records.
- Reported
Industry payment transparency
$13.12 in reported industry payments (1 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1083854699 · Retina Specialist (Ophthalmology) Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1083854699
- ENUM-MID 2009
- TAX-NARROW 983
- RX-LIGHT 124
- BOOK-THIN 24 in Virginia
- PHOTO-ENUM Anuj Chawla, MD · 2009
David Pan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
124 ≥ 34th percentile 34% 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-eligible specialty (heuristic, not verified)
David Pan, M.D. 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 Pan, M.D.?
Quality data not reportedPrimary specialty
Retina Specialist (Ophthalmology) Physician
Medicare Part D claims
124 79% vs specialty avg
Specialty distribution in Virginia
How Retina Specialist (Ophthalmology) Physician compares to other specialties among Virginia 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 Retina Specialist (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).
Practice Address
Provider Details
| NPI | 1083854699 |
|---|---|
| Specialty | Retina Specialist (Ophthalmology) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 02/23/2009 |
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 Pan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$13
Largest payer
Notal Vision, 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 Pan, M.D. - brand share 28.0%
Retina Specialist (Ophthalmology) Physician average
28% brand-name claims vs 72% generic, on 124 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.
124
Total Claims
$8K
Total Drug Cost
39
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 233.3
- Total Day Supply
- 6,507
- Brand vs Generic
- 28% brand / 72% generic
- Brand Drug Cost
- $6K
- Generic Drug Cost
- $2K
Patient Demographics
- Average Patient Age
- 74.7 years
- Avg HCC Risk Score
- 1.09
- Gender Split
- 56% female / 44% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Latanoprost | 35 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Retina Specialist (Ophthalmology) Physician in VA →
All providers in Virginia →
Compare specialties →
Retina Specialist (Ophthalmology) Physician Overview
How David Pan, M.D. fits within the Retina Specialist (Ophthalmology) Physician landscape nationally.
983
Retina Specialist (Ophthalmology) Physician Providers in US
48
States with Retina Specialist (Ophthalmology) Physician
593
Avg Claims per Provider
David Pan, M.D.'s 124 claims are below the specialty average of 593.
Nationwide Retina Specialist (Ophthalmology) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Pan, both outside Virginia so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2009)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Retina Specialist (Ophthalmology) Physician Providers in Virginia
Other clinicians with the same primary specialty enrolled in Virginia, drawn from the same CMS NPPES roster as Pan.
One of 24 Retina Specialist (Ophthalmology) Physician providers enrolled in Virginia, 5 are shown here.
Dr. Juan Astruc
M.D.
Richmond, VA
Evan Berger
Norfolk, VA
Dr. Vikram Brar
MD
Richmond, VA
Dr. Timothy Byrnes
MD
Roanoke, VA
Dr. John Carter
M.D.
Winchester, VA
Compare Retina Specialist (Ophthalmology) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is David Pan, M.D.'s specialty? ▼
David Pan, M.D. specializes in Retina Specialist (Ophthalmology) Physician and practices in Harrisonburg, Virginia. Credentials: M.D..
How much does David Pan, M.D. prescribe under Medicare Part D? ▼
In 2024, David Pan, M.D. wrote 124 Medicare Part D claims totaling $8K in drug costs for 39 beneficiaries.
Where is David Pan, M.D. located? ▼
David Pan, M.D. is located at 1880 RESERVOIR ST STE A, Harrisonburg, VA, 22801. Phone: (540) 920-2020.
What is David Pan, M.D.'s NPI number? ▼
David Pan, M.D.'s National Provider Identifier (NPI) is 1083854699, issued on 02/23/2009.
Does David Pan, M.D. prescribe more brand-name or generic drugs? ▼
David Pan, M.D.'s prescribing is 28% brand-name and 72% generic drugs by claim count, with $6K in brand drug costs.
How many Retina Specialist (Ophthalmology) Physician providers are there in the US? ▼
There are 983 Retina Specialist (Ophthalmology) Physician providers across 48 states in the US. The average Retina Specialist (Ophthalmology) Physician provider writes 593 Medicare Part D claims per year.
What drugs does David Pan, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, David Pan, M.D.'s most frequently prescribed drugs include Latanoprost, Dorzolamide-Timolol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does David Pan, M.D. accept Medicare? ▼
David Pan, M.D. appears in CMS Medicare data with 124 Part D claims and 39 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify David Pan, M.D.'s credentials? ▼
David Pan, M.D.'s NPI is 1083854699 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 (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.