NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1154566594 PA-C
Verify on CMS → Wai Lam, PA-C
Medical Physician Assistant in Chicago, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,694 in Medical Physician Assistant, 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
95
Medicare Part D claims · 37 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
81%
generic claims · 19% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
97.7/100
▲ 14 pts above national avg 83.5 · Exceptional
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Wai Lam, PA-C reported a CMS MIPS final score of 97.7/100 - above the 83.5 national average - and filed 95 Medicare Part D claims in 2024.
- 97.7/100
- MIPS score · +14 vs avg
- 95
- Part D claims, 2024
- 81%
- generic prescribing
- ≥84th
- pct among measured MIPS (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 Wai Lam, PA-C
Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1154566594), first enumerated 12/15/2008.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 95 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
CMS quality reporting (MIPS)
Reported a CMS MIPS final score of 97.7/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Illinois statewide board action statistics are published annually — these figures describe aggregate state activity, not Wai Lam, PA-C's individual license status. Verify directly with the state medical board.
Source: IDFPR annual report 2023
- 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 1154566594 · Medical Physician Assistant
NPI-10 · ENUM-MID · TAX-MID · MIPS-ELITE · RX-TRACE · BOOK-LIGHT · PHOTO-FINISH
- NPI-10 1154566594
- ENUM-MID 2008
- TAX-MID 41K Medical Physician
- MIPS-ELITE 97.7/100
- RX-TRACE 95
- BOOK-LIGHT 797 in Illinois
- PHOTO-FINISH Stacy Underhill, PA-C · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Lam · this provi…
Lam · this provider
97.7 MIPS pts
- Stacy Underhill,…
Stacy Underhill, PA-C
97.7 MIPS pts
- Heather Hoewing,…
Heather Hoewing, PA-C
97.7 MIPS pts
- Chris Ogle, P.A.…
Chris Ogle, P.A.
97.8 MIPS pts
- David Feist, PA-…
David Feist, PA-C
97.8 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Wai Lam, PA-C's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
98 ≥ 84th percentile 84% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Wai Lam, PA-C sits
This provider among medical physician assistant peers
Across the 7,147 medical physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Wai Lam, PA-C writes more Part D claims than 20% of them and scores higher on MIPS quality than 89% - placing this provider in the lower-volume, high-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one medical physician assistant peer from a representative sample of 60; the gold marker is Wai Lam, PA-C. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Wai Lam, PA-C?
High performer (top quartile)Primary specialty
Medical Physician Assistant
Medicare Part D claims
95 92% vs specialty avg
MIPS final score
97.7/100 14.2 pts vs avg
Specialty distribution in Illinois
How Medical Physician Assistant compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Wai Lam, PA-C's 2023 MIPS final score plotted against the Medical Physician Assistant national average
- MIPS Final Score
- 97.7/100
- vs 83.5 national avg · 2023 performance year
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 | 1154566594 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA-C |
| Gender | Male |
| NPI Issued | 12/15/2008 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
97.7188
Final Score
Measured-score avg: 83.5
75.4375
Quality
100
Promoting Interoperability
Reporting: Alternative Payment Model
Hospital and facility affiliations
Facilities where Wai Lam, PA-C 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.
The Board OF Trustees OF The University OF Illinois
Chicago, IL
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - Illinois IDFPR 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 ~42K Illinois medical licensees in 2023 - they are NOT specific to Wai Lam, PA-C. To verify Wai Lam, PA-C's current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR 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 Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Wai Lam, PA-C - brand share 19.0%
Medical Physician Assistant average
19% brand-name claims vs 81% generic, on 95 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.
95
Total Claims
$60K
Total Drug Cost
37
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 144.667
- Total Day Supply
- 4,258
- Brand vs Generic
- 19% brand / 81% generic
- Brand Drug Cost
- $52K
- Generic Drug Cost
- $9K
Patient Demographics
- Average Patient Age
- 69.3 years
- Avg HCC Risk Score
- 2.23
- Gender Split
- 65% female / 35% male
- Age Distribution
- <65: 11, 65-74: 13, 75-84: 13, 85+: 0
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Entecavir | 14 |
| Ursodiol | 14 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Wai Lam, PA-C fits within the Medical Physician Assistant landscape nationally.
40,694
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,139
Avg Claims per Provider
Wai Lam, PA-C's 95 claims are below the specialty average of 1,139.
Nationwide Medical Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Lam, both outside Illinois so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (97.7 here).
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Medical Physician Assistant Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Lam.
One of 797 Medical Physician Assistant providers enrolled in Illinois, 5 are shown here.
Ahmad Abdelghani
PA-C
Schaumburg, IL
Jeneson Abraham
P.A.
Chicago, IL
Rosalva Acosta
PA-C
Gurnee, IL
Samantha Adamczyk
PA-C
Naperville, IL
Kenneth Adams
PA-C
Chillicothe, IL
Compare Medical Physician Assistant nationally: see state-by-state distribution →
Frequently Asked Questions
What is Wai Lam, PA-C's specialty? ▼
Wai Lam, PA-C specializes in Medical Physician Assistant and practices in Chicago, Illinois. Credentials: PA-C.
How much does Wai Lam, PA-C prescribe under Medicare Part D? ▼
In 2024, Wai Lam, PA-C wrote 95 Medicare Part D claims totaling $60K in drug costs for 37 beneficiaries.
What is Wai Lam, PA-C's Medicare quality score? ▼
Wai Lam, PA-C has a CMS MIPS Final Score of 97.7/100 (Quality: 75.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Wai Lam, PA-C located? ▼
Wai Lam, PA-C is located at 1740 W TAYLOR ST STE 2139-D, Chicago, IL, 60612. Phone: (312) 996-9736.
What is Wai Lam, PA-C's NPI number? ▼
Wai Lam, PA-C's National Provider Identifier (NPI) is 1154566594, issued on 12/15/2008.
Does Wai Lam, PA-C prescribe more brand-name or generic drugs? ▼
Wai Lam, PA-C's prescribing is 19% brand-name and 81% generic drugs by claim count, with $52K in brand drug costs.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,694 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,139 Medicare Part D claims per year.
What drugs does Wai Lam, PA-C prescribe most often? ▼
Based on 2024 Medicare Part D data, Wai Lam, PA-C's most frequently prescribed drugs include Entecavir, Ursodiol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Wai Lam, PA-C accept Medicare? ▼
Wai Lam, PA-C appears in CMS Medicare data with 95 Part D claims and 37 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Wai Lam, PA-C's credentials? ▼
Wai Lam, PA-C's NPI is 1154566594 with credentials PA-C. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.