2026 NPPES data Retina Specialist (Ophthalmology) Physician NPI 1508842634 MD
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DELIA SANG, MD

Retina Specialist (Ophthalmology) Physician in BROOKLINE, Massachusetts. 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
1K
Medicare Part D claims · 265 beneficiaries · Retina Specialist (Ophthalmology) Physician avg: 558
Generic prescribing
70%
generic claims · 30% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$67.19
3 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: DELIA SANG, MD is a Retina Specialist (Ophthalmology) Physician ([object Object]) practicing in BROOKLINE, Massachusetts with a Medicare Part D prescribing footprint of 1K claims across 265 beneficiaries — 30% brand-name prescribing . Industry payments of $67.19 across 3 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: DELIA SANG, MD filed 1,183 Medicare Part D claims in 2023 across BROOKLINE, Massachusetts. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

DELIA SANG, 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).

DELIA SANG, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 12/20/2005

NPI 1508842634

Primary specialty

Retina Specialist (Ophthalmology) Physician

Niche

913 US NPIs in this specialty

Medicare Part D claims

1,183 112% vs specialty avg

2023 prescription claims

Specialty avg: 558

Specialty distribution in Massachusetts

How Retina Specialist (Ophthalmology) Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Retina Specialist (Ophthalmology) Physician share within Massachusetts

1. Retina Specialist (Ophthalmology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Retina Specialist (Ophthalmology) Physician share within Massachusetts

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Retina Specialist (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).

DELIA SANG, MD is a Retina Specialist (Ophthalmology) Physician provider practicing in BROOKLINE, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1508842634. 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.

DELIA SANG, MD appears in the CMS NPPES registry as a Retina Specialist (Ophthalmology) Physician provider holding MD credentials at 1101 BEACON ST, BROOKLINE, MA, 02446, with a listed phone of (617) 731-1760. NPI 1508842634 was issued on 12/20/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what SANG 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 1,183 prescription claims written by this provider, covering 265 Medicare beneficiaries and totaling roughly $89K in drug spend, split 30% brand-name and 70% 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.

Retina Specialist (Ophthalmology) Physician is a narrow specialty nationwide, with 913 enrolled providers across 48 states and an average of 558 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

1101 BEACON ST
BROOKLINE, MA 02446

Provider Details

NPI 1508842634
Specialty Retina Specialist (Ophthalmology) Physician
Credentials MD
Gender Female
NPI Issued 12/20/2005

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 DELIA SANG, MD. Source: openpaymentsdata.cms.gov.

Total received

$67

Largest payer

ABBVIE 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.

License & disciplinary context — Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 — they are NOT specific to DELIA SANG, MD. To verify DELIA SANG, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Above average

DELIA SANG, MD — brand share 30.0%
Specialty average (est.)

30% brand-name claims vs 70% generic, on 1,183 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.

1,183
Total Claims
$89K
Total Drug Cost
265
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,987
Total Day Supply
57,085
Brand vs Generic
30% brand / 70% generic
Brand Drug Cost
$67K
Generic Drug Cost
$23K

Patient Demographics

Average Patient Age
81.3 years
Avg HCC Risk Score
1.45
Gender Split
60% female / 40% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Latanoprost
567
Brimonidine Tartrate
151
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
105
Prolensa
Bromfenac Sodium
86
Tobramycin-Dexamethasone
Tobramycin/Dexamethasone
49
Timolol Maleate
47
Prednisolone Acetate
36
Bromfenac Sodium
23
Alphagan P
Brimonidine Tartrate
21
Difluprednate
17

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

Retina Specialist (Ophthalmology) Physician Overview

How DELIA SANG, MD fits within the Retina Specialist (Ophthalmology) Physician landscape nationally.

913
Retina Specialist (Ophthalmology) Physician Providers in US
48
States with Retina Specialist (Ophthalmology) Physician
558
Avg Claims per Provider

DELIA SANG, MD's 1,183 claims are above the specialty average of 558.

Nearby Retina Specialist (Ophthalmology) Physician Providers in Massachusetts

Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as SANG.

Compare Retina Specialist (Ophthalmology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is DELIA SANG, MD's specialty?
DELIA SANG, MD specializes in Retina Specialist (Ophthalmology) Physician and practices in BROOKLINE, Massachusetts. Credentials: MD.
How much does DELIA SANG, MD prescribe under Medicare Part D?
In 2023, DELIA SANG, MD wrote 1,183 Medicare Part D claims totaling $89K in drug costs for 265 beneficiaries.
Where is DELIA SANG, MD located?
DELIA SANG, MD is located at 1101 BEACON ST, BROOKLINE, MA, 02446. Phone: (617) 731-1760.
What is DELIA SANG, MD's NPI number?
DELIA SANG, MD's National Provider Identifier (NPI) is 1508842634, issued on 12/20/2005.
Does DELIA SANG, MD prescribe more brand-name or generic drugs?
DELIA SANG, MD's prescribing is 30% brand-name and 70% generic drugs by claim count, with $67K in brand drug costs.
How many Retina Specialist (Ophthalmology) Physician providers are there in the US?
There are 913 Retina Specialist (Ophthalmology) Physician providers across 48 states in the US. The average Retina Specialist (Ophthalmology) Physician provider writes 558 Medicare Part D claims per year.
What drugs does DELIA SANG, MD prescribe most often?
Based on 2023 Medicare Part D data, DELIA SANG, MD's most frequently prescribed drugs include Latanoprost, Brimonidine Tartrate, Dorzolamide-Timolol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does DELIA SANG, MD accept Medicare?
DELIA SANG, MD appears in CMS Medicare data with 1,183 Part D claims and 265 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify DELIA SANG, MD's credentials?
DELIA SANG, MD's NPI is 1508842634 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

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