2026 NPPES data Allergy & Immunology Physician NPI 1730126921 MD
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HELEN WANG, MD

Allergy & Immunology Physician in CARMEL, Indiana. 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
302
Medicare Part D claims · 59 beneficiaries · Allergy & Immunology Physician avg: 764
Generic prescribing
67%
generic claims · 33% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$2.0K
98 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

HELEN WANG, MD filed 302 Medicare Part D claims in 2023 as a Allergy & Immunology Physician in CARMEL, Indiana, prescribing 67% generic.

302
Part D claims, 2023
67%
generic prescribing
Likely
board-certified (heuristic)

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.

HELEN WANG, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

302 Top 43% higher than 57% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 certification likely (heuristic — not verified)

HELEN WANG, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about HELEN WANG, MD?

Quality data not reported

NPI registry status

Active

Issued 05/31/2006

NPI 1730126921

Primary specialty

Allergy & Immunology Physician

Niche

3,390 US NPIs in this specialty

Medicare Part D claims

302 60% vs specialty avg

2023 prescription claims

Specialty avg: 764

Specialty distribution in Indiana

How Allergy & Immunology Physician compares to other specialties among Indiana providers

Indiana providers

Allergy & Immunology Physician share within Indiana

1. Allergy & Immunology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Allergy & Immunology Physician share within Indiana

Specialty board-certification context

Estimated specialty board-certified rate — Allergy & Immunology Physician (ABMS / AOA reference)

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

Est. board-certified rate (Allergy & Immunology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Allergy & Immunology 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).

HELEN WANG, MD appears in the CMS NPPES registry as a Allergy & Immunology Physician provider holding MD credentials at 12750 HORSEFERRY RD STE 100, CARMEL, IN, 46032, with a listed phone of (317) 795-0707. NPI 1730126921 was issued on 05/31/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what WANG 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 302 prescription claims written by this provider, covering 59 Medicare beneficiaries and totaling roughly $65K in drug spend, split 33% brand-name and 67% 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.

Allergy & Immunology Physician is a narrow specialty nationwide, with 3,390 enrolled providers across 52 states and an average of 764 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

12750 HORSEFERRY RD STE 100
CARMEL, IN 46032

Provider Details

NPI 1730126921
Specialty Allergy & Immunology Physician
Credentials MD
Gender Female
NPI Issued 05/31/2006

Hospital and facility affiliations

Facilities where HELEN WANG, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

CARMEL ALLERGY LLC
CARMEL, IN

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

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 HELEN WANG, MD. Source: openpaymentsdata.cms.gov.

Total received

$2.0K

Largest payer

GlaxoSmithKline, LLC.

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

HELEN WANG, MD — brand share 33.0%
Specialty average (est.)

33% brand-name claims vs 67% generic, on 302 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.

302
Total Claims
$65K
Total Drug Cost
59
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
434
Total Day Supply
11,896
Brand vs Generic
33% brand / 67% generic
Brand Drug Cost
$58K
Generic Drug Cost
$7K

Patient Demographics

Average Patient Age
70.8 years
Avg HCC Risk Score
1.20
Gender Split
73% female / 27% male

Top Prescribed Drugs (Medicare Part D)

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

What HELEN WANG, MD prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Montelukast Sodium
48
Levocetirizine Dihydrochloride
39
Azelastine Hcl
33
Trelegy Ellipta
Fluticasone/Umeclidin/Vilanter
18
Albuterol Sulfate Hfa
Albuterol Sulfate
17
Epinephrine
15
Incruse Ellipta
Umeclidinium Bromide
13
Prednisone
12
Symbicort
Budesonide/Formoterol Fumarate
12

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

Allergy & Immunology Physician Overview

How HELEN WANG, MD fits within the Allergy & Immunology Physician landscape nationally.

3,390
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
764
Avg Claims per Provider

HELEN WANG, MD's 302 claims are below the specialty average of 764.

Nearby Allergy & Immunology Physician Providers in Indiana

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

Compare Allergy & Immunology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is HELEN WANG, MD's specialty?
HELEN WANG, MD specializes in Allergy & Immunology Physician and practices in CARMEL, Indiana. Credentials: MD.
How much does HELEN WANG, MD prescribe under Medicare Part D?
In 2023, HELEN WANG, MD wrote 302 Medicare Part D claims totaling $65K in drug costs for 59 beneficiaries.
Where is HELEN WANG, MD located?
HELEN WANG, MD is located at 12750 HORSEFERRY RD STE 100, CARMEL, IN, 46032. Phone: (317) 795-0707.
What is HELEN WANG, MD's NPI number?
HELEN WANG, MD's National Provider Identifier (NPI) is 1730126921, issued on 05/31/2006.
Does HELEN WANG, MD prescribe more brand-name or generic drugs?
HELEN WANG, MD's prescribing is 33% brand-name and 67% generic drugs by claim count, with $58K in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US?
There are 3,390 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 764 Medicare Part D claims per year.
What drugs does HELEN WANG, MD prescribe most often?
Based on 2023 Medicare Part D data, HELEN WANG, MD's most frequently prescribed drugs include Montelukast Sodium, Levocetirizine Dihydrochloride, Azelastine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does HELEN WANG, MD accept Medicare?
HELEN WANG, MD appears in CMS Medicare data with 302 Part D claims and 59 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify HELEN WANG, MD's credentials?
HELEN WANG, MD's NPI is 1730126921 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