Dr. David Chia-Yau Lam , MD
Anesthesiology โข Worcester, MA
55 Lake Ave N
Worcester, MA 016550002
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on May 10, 2018; this date does not establish years in practice.
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Published CMS data list 359 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 โ Established patient outpatient office visit: 140 service units.
- 99204 โ New patient outpatient office visit: 88 service units.
- 62323 โ Injection of substance into lower spine canal using imaging guidance: 49 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 8 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 55 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Oxycodone Hcl โ 24 prescription fills, including refills.
- Gabapentin โ 18 prescription fills, including refills.
- Cephalexin โ 13 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 80% of clinicians listed under Anesthesiology in Worcester, MA (2024, 99 clinicians with data). Median for this group: 135. Middle half: 66 to 248.
More Medicare Part B services than 85% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: 136. Middle half: 66 to 248.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 84 in 2023 to 359 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2023โ2024.
Practice Location & Contact Primary Location
55 Lake Ave N
Worcester, MA 016550002
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in New Haven, CT. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Umass Memorial Medical Group Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Connecticut School Of Medicine
2018
What Public CMS Data Show
Anesthesiology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
230 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $37,722 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $28,727 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
55 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$227 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $6,611.69 across 76 records.
By nature of payment
- Travel and Lodging: $3,396.48 across 7 records.
- Food and Beverage: $3,215.21 across 69 records.
Reporting-company totals (3 largest of 6)
- Medtronic, Inc.: $3,164.63 across 45 records.
- Saluda Medical Americas, Inc.: $2,064.80 across 11 records.
- Stryker Corporation: $623.11 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
8 years (graduated 2018)
CMS Doctors and Clinicians data list 2018 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2018
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Lam has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Lam as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Worcester and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 80% of clinicians listed under Anesthesiology in Worcester, MA (2024, 99 clinicians with data). Median for this group: 135. Middle half: 66 to 248.
More Medicare Part B services than 85% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: 136. Middle half: 66 to 248.
Medicare-allowed amount
A higher Medicare-allowed amount than 80% of clinicians listed under Anesthesiology in Worcester, MA (2024, 99 clinicians with data). Median for this group: $15,201. Middle half: $7,189 to $31,542.
A higher Medicare-allowed amount than 80% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: $16,429. Middle half: $8,286 to $31,402.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Anesthesiology in Worcester, MA (2024, 99 clinicians with data). Median for this group: $12,147. Middle half: $5,891 to $24,554.
A higher Medicare payment amount than 75% of clinicians listed under Anesthesiology in Massachusetts (2024, 1,137 clinicians with data). Median for this group: $13,131. Middle half: $6,643 to $24,992.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Anesthesiology in Massachusetts (2024, 90 clinicians with data). Median for this group: 110. Middle half: 26 to 331.
Too few clinicians listed under Anesthesiology in Worcester have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 75% of clinicians listed under Anesthesiology in Massachusetts (2024, 90 clinicians with data). Median for this group: $2,252. Middle half: $254 to $11,783.
Too few clinicians listed under Anesthesiology in Worcester have Medicare Part D data for 2024 to compare.
146 active clinicians are listed under Anesthesiology with a practice address in Worcester, MA (2,090 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Worcester
2.1% of these 146 clinicians have the CMS telehealth indicator.
77.4% of these 146 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 327% from 84 in 2023 to 359 in 2024.
- 2023: 84
- 2024: 359
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Medicare-allowed amount
Medicare-allowed amount increased 313% from $9,132 in 2023 to $37,722 in 2024.
- 2023: $9,132
- 2024: $37,722
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Paid by Medicare
Paid by Medicare increased 294% from $7,282 in 2023 to $28,727 in 2024.
- 2023: $7,282
- 2024: $28,727
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 15% from 65 in 2022 to 55 in 2024.
- 2022: 65
- 2023: 109
- 2024: 55
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30-day fills
30-day fills decreased 30% from 79 in 2022 to 55 in 2024.
- 2022: 79
- 2023: 150
- 2024: 55
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Part D drug cost
Part D drug cost decreased 83% from $1,356 in 2022 to $227 in 2024.
- 2022: $1,356
- 2023: $2,063
- 2024: $227
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Industry payments (Open Payments)
Industry payments (Open Payments) stayed about the same: $7,143.81 in 2023 and $6,611.69 in 2025.
- 2023: $7,143.81
- 2024: $7,756.87
- 2025: $6,611.69
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 76 records totaling $6,611.69.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Saluda Medical Americas, Inc. |
Travel and Lodging
In-kind items and services
|
Evoke | General | $1,338.00 |
| Medtronic, Inc. |
Travel and Lodging
In-kind items and services
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INTELLIS ADAPTIVESTIM | General | $967.66 |
| Stryker Corporation |
Travel and Lodging
Cash or cash equivalent
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SCOPIS ENT | General | $623.11 |
| Saluda Medical Americas, Inc. |
Food and Beverage
In-kind items and services
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Evoke | General | $304.13 |
| Medtronic, Inc. |
Travel and Lodging
In-kind items and services
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INTELLIS ADAPTIVESTIM | General | $211.46 |
| Medtronic, Inc. |
Travel and Lodging
In-kind items and services
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INTELLIS ADAPTIVESTIM | General | $189.00 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
KYPHON EXPRESS II KYPHOPAK TRAY | General | $169.42 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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INCEPTIV | General | $166.40 |
| Saluda Medical Americas, Inc. |
Food and Beverage
In-kind items and services
|
Evoke | General | $163.95 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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INCEPTIV | General | $161.61 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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Intracept | General | $152.77 |
| Abbott Laboratories |
Food and Beverage
In-kind items and services
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ETERNA | General | $148.05 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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Intracept | General | $129.47 |
| Saluda Medical Americas, Inc. |
Food and Beverage
In-kind items and services
|
Evoke | General | $117.35 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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INCEPTIV | General | $113.28 |
| Boston Scientific Corporation |
Food and Beverage
In-kind items and services
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Intracept | General | $112.25 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
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INCEPTIV | General | $94.94 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INTELLIS ADAPTIVESTIM | General | $93.94 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INCEPTIV | General | $90.42 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INTELLIS ADAPTIVESTIM | General | $74.38 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INTELLIS ADAPTIVESTIM | General | $70.17 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INTELLIS ADAPTIVESTIM | General | $56.39 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INCEPTIV | General | $51.43 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INCEPTIV | General | $48.44 |
| Medtronic, Inc. |
Food and Beverage
In-kind items and services
|
INTELLIS ADAPTIVESTIM | General | $48.17 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2022โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2023โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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140 | 88 | $445.00 | $93.80 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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88 | 88 | $547.00 | $131.95 |
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62323
Injection of substance into lower spine canal using imaging guidance
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49 | 41 | $998.51 | $98.45 |
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64483
Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level
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19 | 16 | $1155.42 | $119.75 |
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64493
Injection of lower or sacral spine facet joint using imaging guidance, single level
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17 | 11 | $1283.41 | $135.13 |
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64494
Injection of lower or sacral spine facet joint using imaging guidance, second level
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17 | 11 | $650.94 | $75.03 |
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62321
Injection of substance into middle or upper spine canal using imaging guidance
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16 | 14 | $1013.06 | $102.89 |
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64484
Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, each additional level
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13 | 12 | $513.08 | $50.80 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Oxycodone Hcl | Oxycodone Hcl | 24 | 84 | $38.28 | 21 |
| Gabapentin | Gabapentin | 18 | 540 | $151.45 | โ |
| Cephalexin | Cephalexin | 13 | 70 | $37.03 | 12 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2023-05-10NUCC Taxonomy Code: 207L00000X
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
NUCC Taxonomy Code: 207LP2900X
An anesthesiologist who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic and/or cancer pain in both hospital and ambulatory settings. Patient care needs are also coordinated with other specialists.
NUCC Taxonomy Code: 390200000X
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ANESTHESIOLOGY
I20230518000628
MA
3476809419
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Umass Memorial Medical Group Inc
55 Lake Ave N, Worcester, MA 016550002
Phone: 5083341000
Secondary Practice Locations
20 York Street, Ynhh Dept Of Anesthesiology
New Haven, CT 065103220
Phone: 2036884242
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Anesthetist, Certified Registered
Certified Registered Nurse Anesthetist
Anesthesiology
Doctor of Medicine (M.D.)
Nurse Practitioner
Certified Nurse Practitioner
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 55 LAKE AVE N, WORCESTER, MA 016550002 (Tel: 5083343271)
Registered at PO BOX 415348, BOSTON, MA 022415348
Anesthesiology (license number reported to NPPES: MA 1015238)
NPI status registered as active in NPPES database
Registered at 20 YORK STREET, YNHH DEPT OF ANESTHESIOLOGY, NEW HAVEN, CT 065103220 (Tel: 2036884242)
Registered at 20 YORK STREET, YNHH TOMPKINS 226, NEW HAVEN, CT 065103220 (Tel: 2036884242)
Recorded as DAVID LAM, MD
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Anesthesiology Specialists in Worcester
- Dr. Sam Nia, MD
- Daniel Sigalovsky
- Scott Abernathy
- Dr. Rajendra Kanzaria, MD
- Dr. Julia Parzych, MD
- Dr. Stephen Kapaon, MD
Mailing Address
Po Box 415348
Boston, MA 022415348