NPI registry status
Active
2026 NPPES data Allergy & Immunology Physician NPI 1225442130
Verify on CMS → Weyman Lam
Allergy & Immunology Physician in Tulsa, Oklahoma.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 3,412 in Allergy & Immunology 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
1K
Medicare Part D claims · 310 beneficiaries · Allergy & Immunology Physician avg: 788
Generic prescribing
74%
generic claims · 26% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
79.4/100
▼ 4 pts below national avg 83.5 · Above neutral
Industry payments
$4.2K
144 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Weyman Lam reported a CMS MIPS final score of 79.4/100 - below the 83.5 national average - and filed 1,456 Medicare Part D claims in 2024.
- 79.4/100
- MIPS score · -4 vs avg
- 1K
- Part D claims, 2024
- 74%
- 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.
Federal trust snapshot
What official records show about Weyman Lam
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 1225442130), first enumerated 06/18/2014.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,456 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 79.4/100 in the Quality Payment Program — a federal quality measure, not a patient review.
Source: CMS Quality Payment Program
- 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
- Reported
Industry payment transparency
$4.2K in reported industry payments (144 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1225442130 · Allergy & Immunology Physician
NPI-10 · ENUM-MID · TAX-NARROW · MIPS-BELOW · RX-MID · BOOK-THIN · PHOTO-FINISH
- NPI-10 1225442130
- ENUM-MID 2014
- TAX-NARROW 3,412
- MIPS-BELOW 79.4/100
- RX-MID 1,456
- BOOK-THIN 15 in Oklahoma
- PHOTO-FINISH Larry Borish · ±0.0
MIPS final-score neighbourhood
Same-specialty nationwide peers by CMS final score, not geographic proximity
- Lam · this provi…
Lam · this provider
79.4 MIPS pts
- Nandita Mathur K…
Nandita Mathur Khaneja
79.4 MIPS pts
- Jeffrey Tillingh…
Jeffrey Tillinghast
79.4 MIPS pts
- Larry Borish · n…
Larry Borish
79.4 MIPS pts
- Jeffrey Wilson ·…
Jeffrey Wilson
79.4 MIPS pts
What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).
Weyman Lam'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.
79 ≥ 26th percentile 26% 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 Weyman Lam sits
This provider among allergy & immunology physician peers
Across the 659 allergy & immunology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Weyman Lam writes more Part D claims than 80% of them and scores higher on MIPS quality than 44% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Each dot is one allergy & immunology physician peer from a representative sample of 60; the gold marker is Weyman Lam. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Weyman Lam practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Weyman Lam?
Near national averagePrimary specialty
Allergy & Immunology Physician
Medicare Part D claims
1,456 85% vs specialty avg
MIPS final score
79.4/100 4.1 pts vs avg
Specialty distribution in Oklahoma
How Allergy & Immunology Physician compares to other specialties among Oklahoma providers
Medicare quality performance, MIPS
Weyman Lam's 2023 MIPS final score plotted against the Allergy & Immunology Physician national average
- MIPS Final Score
- 79.4/100
- 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 | 1225442130 |
|---|---|
| Specialty | Allergy & Immunology Physician |
| Gender | Male |
| NPI Issued | 06/18/2014 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
79.393
Final Score
Measured-score avg: 83.5
77.7697
Quality
54.3735
Cost
99
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Weyman Lam 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.
Warren Clinic Inc
Tulsa, OK
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 Weyman Lam. Source: openpaymentsdata.cms.gov.
Total received
$4.2K
Largest payer
GENZYME CORPORATION
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
Weyman Lam - brand share 26.0%
Allergy & Immunology Physician average
26% brand-name claims vs 74% generic, on 1,456 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.
1,456
Total Claims
$1.4M
Total Drug Cost
310
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,916.333
- Total Day Supply
- 51,196
- Brand vs Generic
- 26% brand / 74% generic
- Brand Drug Cost
- $1.3M
- Generic Drug Cost
- $64K
Patient Demographics
- Average Patient Age
- 71.0 years
- Avg HCC Risk Score
- 1.16
- Gender Split
- 69% female / 31% male
- Age Distribution
- <65: 41, 65-74: 156, 75-84: 98, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Weyman Lam prescribes most
Top Medicare Part D drugs by claim count, 2024
- Hydroxyzine Hcl
Hydroxyzine Hcl
205 claims
- Ipratropium Bromide
Ipratropium Bromide
155 claims
- Azelastine Hcl
Azelastine Hcl
153 claims
- Trelegy Ellipta
Trelegy Ellipta
114 claims
- Famotidine
Famotidine
113 claims
- Fluticasone Propio…
Fluticasone Propionate
106 claims
- Montelukast Sodium
Montelukast Sodium
87 claims
- Albuterol Sulfate … 49
Albuterol Sulfate Hfa
49 claims
| Drug | Claims |
|---|---|
| Hydroxyzine Hcl | 205 |
| Ipratropium Bromide | 155 |
| Azelastine Hcl | 153 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 114 |
| Famotidine | 113 |
| Fluticasone Propionate | 106 |
| Montelukast Sodium | 87 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 49 |
| Azelastine-Fluticasone Azelastine/Fluticasone | 39 |
| Dupixent Pen Dupilumab | 39 |
* 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 Weyman Lam fits within the Allergy & Immunology Physician landscape nationally.
3,412
Allergy & Immunology Physician Providers in US
52
States with Allergy & Immunology Physician
788
Avg Claims per Provider
Weyman Lam's 1,456 claims are above the specialty average of 788.
Nationwide Allergy & Immunology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Lam, both outside Oklahoma so the neighborhoods are not geographic containment.
Similar MIPS final score
Nearest same-specialty clinicians by CMS MIPS final score (79.4 here).
Same NPPES enumeration year (2014)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Allergy & Immunology Physician Providers in Oklahoma
Other clinicians with the same primary specialty enrolled in Oklahoma, drawn from the same CMS NPPES roster as Lam.
One of 15 Allergy & Immunology Physician providers enrolled in Oklahoma, 5 are shown here.
Dr. Dean Atkinson
MD
Oklahoma City, OK
Dr. John Bozalis
MD
Oklahoma City, OK
Dr. Terence Carey
M.D.
Tulsa, OK
Dr. Amy Darter
M.D.
Oklahoma City, OK
Dr. Warren Filley
M.D.
Oklahoma City, OK
Compare Allergy & Immunology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Weyman Lam's specialty? ▼
Weyman Lam specializes in Allergy & Immunology Physician and practices in Tulsa, Oklahoma.
How much does Weyman Lam prescribe under Medicare Part D? ▼
In 2024, Weyman Lam wrote 1,456 Medicare Part D claims totaling $1.4M in drug costs for 310 beneficiaries.
What is Weyman Lam's Medicare quality score? ▼
Weyman Lam has a CMS MIPS Final Score of 79.4/100 (Quality: 77.8, Cost: 54.4). 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 Weyman Lam located? ▼
Weyman Lam is located at 6160 S YALE AVE, Tulsa, OK, 74136. Phone: (918) 495-2636.
What is Weyman Lam's NPI number? ▼
Weyman Lam's National Provider Identifier (NPI) is 1225442130, issued on 06/18/2014.
Does Weyman Lam prescribe more brand-name or generic drugs? ▼
Weyman Lam's prescribing is 26% brand-name and 74% generic drugs by claim count, with $1.3M in brand drug costs.
How many Allergy & Immunology Physician providers are there in the US? ▼
There are 3,412 Allergy & Immunology Physician providers across 52 states in the US. The average Allergy & Immunology Physician provider writes 788 Medicare Part D claims per year.
What drugs does Weyman Lam prescribe most often? ▼
Based on 2024 Medicare Part D data, Weyman Lam's most frequently prescribed drugs include Hydroxyzine Hcl, Ipratropium Bromide, Azelastine Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Weyman Lam accept Medicare? ▼
Weyman Lam appears in CMS Medicare data with 1,456 Part D claims and 310 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Weyman Lam's credentials? ▼
Weyman Lam's NPI is 1225442130. 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.