2026 NPPES data Ophthalmology Physician NPI 1407897283 M.D.
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WILLIAM TOWNSEND, M.D.

Ophthalmology Physician in HATO REY, Puerto Rico. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
87
Medicare Part D claims · 13 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
41%
generic claims · 59% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$30.56
1 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: WILLIAM TOWNSEND, M.D. is a Ophthalmology Physician ([object Object]) practicing in HATO REY, Puerto Rico with a Medicare Part D prescribing footprint of 87 claims across 13 beneficiaries — 59% brand-name prescribing . Industry payments of $30.56 across 1 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: WILLIAM TOWNSEND, M.D. filed 87 Medicare Part D claims in 2023 across HATO REY, Puerto Rico. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

WILLIAM TOWNSEND, 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).

WILLIAM TOWNSEND, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 06/10/2006

NPI 1407897283

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

87 94% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

Specialty distribution in Puerto Rico

How Ophthalmology Physician compares to other specialties among Puerto Rico providers

Puerto Rico providers

Ophthalmology Physician share within Puerto Rico

1. Ophthalmology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ophthalmology Physician share within Puerto Rico

Specialty board-certification context

Estimated specialty board-certified rate — Ophthalmology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Ophthalmology Physician ABMS/AOA estimate

Est. board-certified rate (Ophthalmology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Ophthalmology Physician) — ABMS / AOA estimate

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).

WILLIAM TOWNSEND, M.D. is a Ophthalmology Physician provider practicing in HATO REY, Puerto Rico, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1407897283. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

WILLIAM TOWNSEND, M.D. appears in the CMS NPPES registry as a Ophthalmology Physician provider holding M.D. credentials at 735 PONCE DE LEON AVE, HATO REY, PR, 00917, with a listed phone of (787) 782-1066. NPI 1407897283 was issued on 06/10/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what TOWNSEND most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 87 prescription claims written by this provider, covering 13 Medicare beneficiaries and totaling roughly $11K in drug spend, split 59% brand-name and 41% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

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

735 PONCE DE LEON AVE
HATO REY, PR 00917

Provider Details

NPI 1407897283
Specialty Ophthalmology Physician
Credentials M.D.
Gender Male
NPI Issued 06/10/2006

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 WILLIAM TOWNSEND, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$31

Largest payer

Apellis Pharmaceuticals, 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 · Brand-heavy

WILLIAM TOWNSEND, M.D. — brand share 59.0%
Specialty average (est.)

59% brand-name claims vs 41% generic, on 87 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.

87
Total Claims
$11K
Total Drug Cost
13
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
90
Total Day Supply
2,377
Brand vs Generic
59% brand / 41% generic
Brand Drug Cost
$10K

Patient Demographics

Average Patient Age
75.7 years
Avg HCC Risk Score
1.38

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

Drug Claims
Diltiazem 24hr Er
Diltiazem Hcl
12
Irbesartan
12
Latanoprost
12

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Ophthalmology Physician Overview

How WILLIAM TOWNSEND, M.D. 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

WILLIAM TOWNSEND, M.D.'s 87 claims are below the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in Puerto Rico

Other clinicians with the same primary specialty enrolled in Puerto Rico, drawn from the same CMS NPPES roster as TOWNSEND.

Compare Ophthalmology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is WILLIAM TOWNSEND, M.D.'s specialty?
WILLIAM TOWNSEND, M.D. specializes in Ophthalmology Physician and practices in HATO REY, Puerto Rico. Credentials: M.D..
How much does WILLIAM TOWNSEND, M.D. prescribe under Medicare Part D?
In 2023, WILLIAM TOWNSEND, M.D. wrote 87 Medicare Part D claims totaling $11K in drug costs for 13 beneficiaries.
Where is WILLIAM TOWNSEND, M.D. located?
WILLIAM TOWNSEND, M.D. is located at 735 PONCE DE LEON AVE, HATO REY, PR, 00917. Phone: (787) 782-1066.
What is WILLIAM TOWNSEND, M.D.'s NPI number?
WILLIAM TOWNSEND, M.D.'s National Provider Identifier (NPI) is 1407897283, issued on 06/10/2006.
Does WILLIAM TOWNSEND, M.D. prescribe more brand-name or generic drugs?
WILLIAM TOWNSEND, M.D.'s prescribing is 59% brand-name and 41% generic drugs by claim count, with $10K 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 WILLIAM TOWNSEND, M.D. prescribe most often?
Based on 2023 Medicare Part D data, WILLIAM TOWNSEND, M.D.'s most frequently prescribed drugs include Diltiazem 24hr Er, Irbesartan, Latanoprost. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does WILLIAM TOWNSEND, M.D. accept Medicare?
WILLIAM TOWNSEND, M.D. appears in CMS Medicare data with 87 Part D claims and 13 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify WILLIAM TOWNSEND, M.D.'s credentials?
WILLIAM TOWNSEND, M.D.'s NPI is 1407897283 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

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