NPI registry status
Active
2026 NPPES data Pediatric Hematology & Oncology Physician NPI 1487810156 MD
Verify on CMS → Timothy Lax, MD
Pediatric Hematology & Oncology Physician in Brookline, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 2,666 in Pediatric Hematology & Oncology 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
741
Medicare Part D claims · 142 beneficiaries · Pediatric Hematology & Oncology Physician avg: 88
Generic prescribing
47%
generic claims · 53% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$642.77
24 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Timothy Lax, MD filed 741 Medicare Part D claims in 2024 as a Pediatric Hematology & Oncology Physician in Brookline, Massachusetts, prescribing 47% generic.
- 741
- Part D claims, 2024
- 47%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥70th
- 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 Timothy Lax, 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 1487810156), first enumerated 08/01/2008.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 741 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
- Reported
Industry payment transparency
$642.77 in reported industry payments (24 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Timothy Lax, MD's individual license status. Verify directly with the state medical board.
Source: BORIM 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 1487810156 · Pediatric Hematology & Oncology Physician
NPI-10 · ENUM-MID · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1487810156
- ENUM-MID 2008
- TAX-NARROW 2,666
- RX-LIGHT 741
- BOOK-THIN 142 in Massachusetts
- PHOTO-ENUM Dimarys Sanchez · 2008
Timothy Lax, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
741 ≥ 70th percentile 70% 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)
Timothy Lax, 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 Timothy Lax, MD?
Quality data not reportedPrimary specialty
Pediatric Hematology & Oncology Physician
Medicare Part D claims
741 8× vs specialty avg
Specialty distribution in Massachusetts
How Pediatric Hematology & Oncology Physician compares to other specialties among Massachusetts 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 Pediatric Hematology & Oncology 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 | 1487810156 |
|---|---|
| Specialty | Pediatric Hematology & Oncology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 08/01/2008 |
Hospital and facility affiliations
Facilities where Timothy Lax, 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.
Berkshire Allergy Care PC
Pittsfield, MA
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 Timothy Lax, MD. Source: openpaymentsdata.cms.gov.
Total received
$643
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.
License & disciplinary context - Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 - they are NOT specific to Timothy Lax, MD. To verify Timothy Lax, MD's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases
BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Timothy Lax, MD - brand share 53.0%
Pediatric Hematology & Oncology Physician average
53% brand-name claims vs 47% generic, on 741 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.
741
Total Claims
$515K
Total Drug Cost
142
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,128.3
- Total Day Supply
- 31,263
- Brand vs Generic
- 53% brand / 47% generic
- Brand Drug Cost
- $503K
- Generic Drug Cost
- $12K
- Antibiotic Claims
- 13
Patient Demographics
- Average Patient Age
- 72.6 years
- Avg HCC Risk Score
- 1.19
- Gender Split
- 59% female / 41% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Timothy Lax, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Ipratropium Bromide
Ipratropium Bromide
65 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
62 claims
- Montelukast Sodium
Montelukast Sodium
60 claims
- Azelastine Hcl
Azelastine Hcl
55 claims
- Breo Ellipta
Breo Ellipta
43 claims
- Privigen
Privigen
42 claims
- Advair Hfa
Advair Hfa
40 claims
- Fluticasone Propio…
Fluticasone Propionate
40 claims
| Drug | Claims |
|---|---|
| Ipratropium Bromide | 65 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 62 |
| Montelukast Sodium | 60 |
| Azelastine Hcl | 55 |
| Breo Ellipta Fluticasone/Vilanterol | 43 |
| Privigen Immun Glob G(Igg)/Pro/Iga 0-50 | 42 |
| Advair Hfa Fluticasone Propion/Salmeterol | 40 |
| Fluticasone Propionate | 40 |
| Arnuity Ellipta Fluticasone Furoate | 35 |
| Panzyga Immun Glob G(Igg)-Ifas/Glycine | 32 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Pediatric Hematology & Oncology Physician in MA →
All providers in Massachusetts →
Compare specialties →
Pediatric Hematology & Oncology Physician Overview
How Timothy Lax, MD fits within the Pediatric Hematology & Oncology Physician landscape nationally.
2,666
Pediatric Hematology & Oncology Physician Providers in US
52
States with Pediatric Hematology & Oncology Physician
88
Avg Claims per Provider
Timothy Lax, MD's 741 claims are above the specialty average of 88.
Nationwide Pediatric Hematology & Oncology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Lax, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2008)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Pediatric Hematology & Oncology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Lax.
One of 142 Pediatric Hematology & Oncology Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Denise Adams
MD
Boston, MA
Laura Aguilar
MD PHD
Boston, MA
Steven Arkin
Cambridge, MA
Dr. Scott Armstrong
MD, PHD
Boston, MA
Dr. Pratiti Bandopadhayay
M.D
Boston, MA
Compare Pediatric Hematology & Oncology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Timothy Lax, MD's specialty? ▼
Timothy Lax, MD specializes in Pediatric Hematology & Oncology Physician and practices in Brookline, Massachusetts. Credentials: MD.
How much does Timothy Lax, MD prescribe under Medicare Part D? ▼
In 2024, Timothy Lax, MD wrote 741 Medicare Part D claims totaling $515K in drug costs for 142 beneficiaries.
Where is Timothy Lax, MD located? ▼
Timothy Lax, MD is located at 1 BROOKLINE PL, Brookline, MA, 02445. Phone: (617) 278-8100.
What is Timothy Lax, MD's NPI number? ▼
Timothy Lax, MD's National Provider Identifier (NPI) is 1487810156, issued on 08/01/2008.
Does Timothy Lax, MD prescribe more brand-name or generic drugs? ▼
Timothy Lax, MD's prescribing is 53% brand-name and 47% generic drugs by claim count, with $503K in brand drug costs.
How many Pediatric Hematology & Oncology Physician providers are there in the US? ▼
There are 2,666 Pediatric Hematology & Oncology Physician providers across 52 states in the US. The average Pediatric Hematology & Oncology Physician provider writes 88 Medicare Part D claims per year.
What drugs does Timothy Lax, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Timothy Lax, MD's most frequently prescribed drugs include Ipratropium Bromide, Albuterol Sulfate Hfa, Montelukast Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Timothy Lax, MD accept Medicare? ▼
Timothy Lax, MD appears in CMS Medicare data with 741 Part D claims and 142 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Timothy Lax, MD's credentials? ▼
Timothy Lax, MD's NPI is 1487810156 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.