NPI registry status
Active
2026 NPPES data Hospitalist Physician NPI 1699183285 MD.
Verify on CMS → Lewis Yang, MD.
Hospitalist Physician in Baltimore, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 17,950 in Hospitalist 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
139
Medicare Part D claims · 60 beneficiaries · Hospitalist Physician avg: 940
Generic prescribing
88%
generic claims · 12% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Lewis Yang, MD. filed 139 Medicare Part D claims in 2024 as a Hospitalist Physician in Baltimore, Maryland, prescribing 88% generic.
- 139
- Part D claims, 2024
- 88%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥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 Lewis Yang, MD.
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 1699183285), first enumerated 07/27/2014.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 139 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
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- 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 1699183285 · Hospitalist Physician
NPI-10 · ENUM-MID · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1699183285
- ENUM-MID 2014
- TAX-MID 18K Hospitalist Physician
- RX-LIGHT 139
- BOOK-THIN 323 in Maryland
- PHOTO-ENUM Fernando Velazquez V… · 2014
Lewis Yang, MD.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
139 ≥ 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 certification likely (heuristic, not verified)
Lewis Yang, 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 Lewis Yang, MD.?
Quality data not reportedPrimary specialty
Hospitalist Physician
Medicare Part D claims
139 85% vs specialty avg
Specialty distribution in Maryland
How Hospitalist Physician compares to other specialties among Maryland 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 Hospitalist 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 | 1699183285 |
|---|---|
| Specialty | Hospitalist Physician |
| Credentials | MD. |
| Gender | Male |
| NPI Issued | 07/27/2014 |
Hospital and facility affiliations
Facilities where Lewis Yang, 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.
South Sound Inpatient Physicians PLLC
Tacoma, WA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Typical
Lewis Yang, MD. - brand share 12.0%
Hospitalist Physician average
12% brand-name claims vs 88% generic, on 139 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.
139
Total Claims
$5K
Total Drug Cost
60
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 147.467
- Total Day Supply
- 2,630
- Brand vs Generic
- 12% brand / 88% generic
- Brand Drug Cost
- $3K
- Generic Drug Cost
- $1K
- Opioid Claims
- 18 (12.9% rate)
- Antibiotic Claims
- 34
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 2.65
- Gender Split
- 48% female / 52% male
Hospitalist Physician Overview
How Lewis Yang, MD. fits within the Hospitalist Physician landscape nationally.
17,950
Hospitalist Physician Providers in US
54
States with Hospitalist Physician
940
Avg Claims per Provider
Lewis Yang, MD.'s 139 claims are below the specialty average of 940.
Nationwide Hospitalist Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Yang, both outside Maryland so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Hospitalist Physician Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Yang.
One of 323 Hospitalist Physician providers enrolled in Maryland, 5 are shown here.
Dr. Fasika Aberra
M.D.
Prince Frederick, MD
Dr. Ademayowa Ademiluyi
MD
Towson, MD
Dr. Elham Afshar
M.D.
Baltimore, MD
Dr. Negin Ahadi
MD
Baltimore, MD
Dr. Bernice Aidoo
MD
Takoma Park, MD
Compare Hospitalist Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Lewis Yang, MD.'s specialty? ▼
Lewis Yang, MD. specializes in Hospitalist Physician and practices in Baltimore, Maryland. Credentials: MD..
How much does Lewis Yang, MD. prescribe under Medicare Part D? ▼
In 2024, Lewis Yang, MD. wrote 139 Medicare Part D claims totaling $5K in drug costs for 60 beneficiaries.
Where is Lewis Yang, MD. located? ▼
Lewis Yang, MD. is located at 201 E UNIVERSITY PKWY, Baltimore, MD, 21218. Phone: (410) 554-2284.
What is Lewis Yang, MD.'s NPI number? ▼
Lewis Yang, MD.'s National Provider Identifier (NPI) is 1699183285, issued on 07/27/2014.
Does Lewis Yang, MD. prescribe more brand-name or generic drugs? ▼
Lewis Yang, MD.'s prescribing is 12% brand-name and 88% generic drugs by claim count, with $3K in brand drug costs.
Does Lewis Yang, MD. prescribe opioids? ▼
Yes, Lewis Yang, MD. had 18 opioid claims in 2024 with an opioid prescribing rate of 12.9%.
How many Hospitalist Physician providers are there in the US? ▼
There are 17,950 Hospitalist Physician providers across 54 states in the US. The average Hospitalist Physician provider writes 940 Medicare Part D claims per year.
Does Lewis Yang, MD. accept Medicare? ▼
Lewis Yang, MD. appears in CMS Medicare data with 139 Part D claims and 60 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Lewis Yang, MD.'s credentials? ▼
Lewis Yang, MD.'s NPI is 1699183285 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
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.