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 2,574 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
721
Medicare Part D claims · 174 beneficiaries · Pediatric Hematology & Oncology Physician avg: 92
Generic prescribing
45%
generic claims · 55% 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, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Timothy Lax, MD filed 721 Medicare Part D claims in 2023 as a Pediatric Hematology & Oncology Physician in Brookline, Massachusetts, prescribing 45% generic.
- 721
- Part D claims, 2023
- 45%
- 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.
Timothy Lax, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
721 Top 29% higher than 71% of 1,370,886 prescribers
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)
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
721 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).
Timothy Lax, MD appears in the CMS NPPES registry as a Pediatric Hematology & Oncology Physician provider holding MD credentials at 1 BROOKLINE PL, Brookline, MA, 02445, with a listed phone of (617) 278-8100. NPI 1487810156 was issued on 08/01/2008.
Medicare Part D records for calendar year 2023 show 721 prescription claims written by this provider, covering 174 Medicare beneficiaries and totaling roughly $858K in drug spend, split 55% brand-name and 45% generic by claim count.
Pediatric Hematology & Oncology Physician is a narrow specialty nationwide, with 2,574 enrolled providers across 52 states and an average of 92 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
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 55.0%
Pediatric Hematology & Oncology Physician average
55% brand-name claims vs 45% generic, on 721 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.
721
Total Claims
$858K
Total Drug Cost
174
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,051
- Total Day Supply
- 28,775
- Brand vs Generic
- 55% brand / 45% generic
- Brand Drug Cost
- $844K
- Generic Drug Cost
- $14K
- Antibiotic Claims
- 19
Patient Demographics
- Average Patient Age
- 70.9 years
- Avg HCC Risk Score
- 1.25
- Gender Split
- 62% female / 38% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Timothy Lax, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Privigen
Privigen
103 claims
- Azelastine Hcl
Azelastine Hcl
78 claims
- Montelukast Sodium
Montelukast Sodium
62 claims
- Ipratropium Bromide
Ipratropium Bromide
60 claims
- Albuterol Sulfate …
Albuterol Sulfate Hfa
43 claims
- Symbicort 33
Symbicort
33 claims
- Epinephrine 29
Epinephrine
29 claims
- Prednisone 28
Prednisone
28 claims
| Drug | Claims |
|---|---|
| Privigen Immun Glob G(Igg)/Pro/Iga 0-50 | 103 |
| Azelastine Hcl | 78 |
| Montelukast Sodium | 62 |
| Ipratropium Bromide | 60 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 43 |
| Symbicort Budesonide/Formoterol Fumarate | 33 |
| Epinephrine | 29 |
| Prednisone | 28 |
| Panzyga Immun Glob G(Igg)-Ifas/Glycine | 27 |
| Flovent Hfa Fluticasone Propionate | 19 |
* 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.
2,574
Pediatric Hematology & Oncology Physician Providers in US
52
States with Pediatric Hematology & Oncology Physician
92
Avg Claims per Provider
Timothy Lax, MD's 721 claims are above the specialty average of 92.
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.
Dr. Denise Adams
MD
Boston, MA
Dr. 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 →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Massachusetts medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Pediatric Hematology & Oncology Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
Healthcare Guides
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Medical Specialties Explained
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Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Massachusetts
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 2023, Timothy Lax, MD wrote 721 Medicare Part D claims totaling $858K in drug costs for 174 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 55% brand-name and 45% generic drugs by claim count, with $844K in brand drug costs.
How many Pediatric Hematology & Oncology Physician providers are there in the US? ▼
There are 2,574 Pediatric Hematology & Oncology Physician providers across 52 states in the US. The average Pediatric Hematology & Oncology Physician provider writes 92 Medicare Part D claims per year.
What drugs does Timothy Lax, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Timothy Lax, MD's most frequently prescribed drugs include Privigen, Azelastine Hcl, 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 721 Part D claims and 174 Medicare beneficiaries in 2023. 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 (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
Compiled from official public sources by the PlainDoctor editorial team.