2026 NPPES data Internal Medicine Physician NPI 1669648986 MD
Verify on CMS →

LILY HWANG, MD

Internal Medicine Physician in ROSWELL, Georgia. 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
2K
Medicare Part D claims · 1K beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
33%
generic claims · 67% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$26.0K
98 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

LILY HWANG, MD filed 2,025 Medicare Part D claims in 2023 as a Internal Medicine Physician in ROSWELL, Georgia, prescribing 33% generic.

2K
Part D claims, 2023
33%
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.

LILY HWANG, MD's Medicare Part D volume vs every U.S. prescriber

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

2,025 Top 16% higher than 84% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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)

LILY HWANG, 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 LILY HWANG, MD?

Quality data not reported

NPI registry status

Active

Issued 05/06/2008

NPI 1669648986

Primary specialty

Internal Medicine Physician

High-volume

172,858 US NPIs in this specialty

Medicare Part D claims

2,025 25% vs specialty avg

2023 prescription claims

Specialty avg: 2,716

Specialty distribution in Georgia

How Internal Medicine Physician compares to other specialties among Georgia providers

Georgia providers

Internal Medicine Physician share within Georgia

1. Internal Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Internal Medicine Physician share within Georgia

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Internal Medicine 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).

LILY HWANG, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 1357 HEMBREE RD STE 200, ROSWELL, GA, 30076, with a listed phone of (770) 953-3331. NPI 1669648986 was issued on 05/06/2008. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what HWANG 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 2,025 prescription claims written by this provider, covering 1,024 Medicare beneficiaries and totaling roughly $848K in drug spend, split 67% brand-name and 33% 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.

Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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

1357 HEMBREE RD STE 200
ROSWELL, GA 30076

Provider Details

NPI 1669648986
Specialty Internal Medicine Physician
Credentials MD
Gender Female
NPI Issued 05/06/2008

Hospital and facility affiliations

Facilities where LILY HWANG, 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.

ATLANTA ALLERGY AND ASTHMA CLINIC PA
ROSWELL, GA

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 LILY HWANG, MD. Source: openpaymentsdata.cms.gov.

Total received

$26.0K

Largest payer

AstraZeneca Pharmaceuticals LP

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

LILY HWANG, MD — brand share 67.0%
Specialty average (est.)

67% brand-name claims vs 33% generic, on 2,025 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.

2,025
Total Claims
$848K
Total Drug Cost
1,024
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,636
Total Day Supply
48,994
Brand vs Generic
67% brand / 33% generic
Brand Drug Cost
$825K
Antibiotic Claims
13

Patient Demographics

Average Patient Age
77.1 years
Avg HCC Risk Score
1.33
Gender Split
68% female / 32% male
Age Distribution
<65: 57, 65-74: 358, 75-84: 368, 85+: 241

Top Prescribed Drugs (Medicare Part D)

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

What LILY HWANG, 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
Arexvy
Rsvpref3 Antigen/As01e/Pf
489
Shingrix
Varicella-Zoster Ge/As01b/Pf
332
Montelukast Sodium
137
Famotidine
99
Ipratropium Bromide
84
Albuterol Sulfate Hfa
Albuterol Sulfate
67
Azelastine Hcl
65
Trelegy Ellipta
Fluticasone/Umeclidin/Vilanter
62
Levocetirizine Dihydrochloride
56
Symbicort
Budesonide/Formoterol Fumarate
55

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

Internal Medicine Physician Overview

How LILY HWANG, MD fits within the Internal Medicine Physician landscape nationally.

172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider

LILY HWANG, MD's 2,025 claims are below the specialty average of 2,716.

Nearby Internal Medicine Physician Providers in Georgia

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

Compare Internal Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is LILY HWANG, MD's specialty?
LILY HWANG, MD specializes in Internal Medicine Physician and practices in ROSWELL, Georgia. Credentials: MD.
How much does LILY HWANG, MD prescribe under Medicare Part D?
In 2023, LILY HWANG, MD wrote 2,025 Medicare Part D claims totaling $848K in drug costs for 1,024 beneficiaries.
Where is LILY HWANG, MD located?
LILY HWANG, MD is located at 1357 HEMBREE RD STE 200, ROSWELL, GA, 30076. Phone: (770) 953-3331.
What is LILY HWANG, MD's NPI number?
LILY HWANG, MD's National Provider Identifier (NPI) is 1669648986, issued on 05/06/2008.
Does LILY HWANG, MD prescribe more brand-name or generic drugs?
LILY HWANG, MD's prescribing is 67% brand-name and 33% generic drugs by claim count, with $825K in brand drug costs.
How many Internal Medicine Physician providers are there in the US?
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
What drugs does LILY HWANG, MD prescribe most often?
Based on 2023 Medicare Part D data, LILY HWANG, MD's most frequently prescribed drugs include Arexvy, Shingrix, Montelukast Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does LILY HWANG, MD accept Medicare?
LILY HWANG, MD appears in CMS Medicare data with 2,025 Part D claims and 1,024 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify LILY HWANG, MD's credentials?
LILY HWANG, MD's NPI is 1669648986 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