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Dr. Steven T. Lacy, MD
NPI1225127897PAC ID2668411653
- Medicare services, 2019
- 76
- Part D claims, 2024
- 765
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $19
- Practice address
- 300 Longwood Avenue, Boston, MA 02115
- Practice phone
- Call (617) 735-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Lacy's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Steven T. Lacy is an internist in Boston, Massachusetts
Dr. Lacy practices at Boston Children's Hospital in Boston, Massachusetts, part of The Children's Hospital.
Dr. Lacy's NPI, 1225127897, was assigned on October 12, 2006. Dr. Lacy holds Massachusetts license 52901.
NPI and contact details
- NPI
- 1225127897NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668411653
- NPI enumeration date
- October 12, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 735-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Steven T. Lacy practices at Boston Children's Hospital in Boston, Massachusetts
Dr. Lacy's primary practice is Boston Children's Hospital, at 300 Longwood Avenue, Boston, MA 02115 in Suffolk County. The practice phone is (617) 735-6000.
- Boston Children's Hospital300 Longwood Avenue, Boston, MA 02115 · Suffolk CountyPhone(617) 735-6000
Source: Dmand AI Affiliation Data
Dr. Steven T. Lacy is affiliated with 3 sites of care and 1 medical group
Dr. Lacy's primary practice is Boston Children's Hospital in Boston, Massachusetts, part of The Children's Hospital. The medical group on file is Harbor Health. Dmand AI also links Dr. Lacy to 1 more community health center and 1 dialysis center, each named with a free account.
Harbor Health1 community health centerName with a free account1 dialysis centerName with a free account
See all 4 affiliations for Dr. LacySources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Steven T. Lacy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lacy practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Boston Children's Hospital | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every hospital where Dr. Lacy practices
Dmand AI maps EHR vendors, IT decision makers and buying committees across The Children's Hospital and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Steven T. Lacy is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Lacy's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Lacy is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Lacy
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Steven T. Lacy billed Medicare for 76 services in 2019
CMS data shows 76 Medicare services from Dr. Lacy across 2 procedure codes in 2019. Medicare paid $413 for them. Every service was in an office.
Medicare services, 201976
Paid by Medicare$413
Procedure codes2
Dr. Lacy's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Lab and pathology
- 2018: 612019: 7625%
Dr. Lacy compared with the Massachusetts median for internists, 2019
- Dr. Lacy
- Massachusetts median
- Medicare services
- 76vs 43182% below
- Part D claims
- 432vs 4027% above
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Lacy's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Lacy?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lacy and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Steven T. Lacy's patients have a median age of 58
Across all payers, Dmand AI patient panel data puts Dr. Lacy's median patient age at 58, with 42% women.
Dr. Lacy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women42%
- Men57%
Source: Dmand AI Patient Panel Data
Dr. Steven T. Lacy wrote 765 Medicare Part D claims in 2024
In 2024, Dr. Lacy wrote 765 Medicare Part D claims for 293 patients. 91% of them were for generic drugs. CMS names the drug for 432 of them, across 16 drugs with 11 or more claims each, at $5,851 in total drug cost. In 2023, CMS named 400 claims across 14 drugs.
Part D claims, 2024765
Drugs named by CMS16
Total drug cost$5,851
Part D patients293
Dr. Lacy's Part D claims by kind of drug, 2024
- Generic696 claims91%
- Brand-name and other69 claims9%
Dr. Lacy's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4002024: 4328%
Drugs named by CMS: 16 in 2024, 14 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Steven T. Lacy takes part in Medicare
Dr. Lacy accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Steven T. Lacy has 1 publication on record
Dmand AI links 1 paper to Dr. Lacy in 2011.
Papers1
Recent publications by Dr. Lacy
See who Dr. Lacy researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Lacy works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Steven T. Lacy received $19 in industry payments in 2024
CMS Open Payments shows 1 general payment to Dr. Lacy from 1 drug or device company in 2024. Food and beverage make up the largest share, 100% of the total. Exact Sciences Corporation paid the most, $19.
Companies that paid Dr. Lacy the most, 2024 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Steven T. Lacy's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Steven T. Lacy
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Steven T. Lacy's NPI number?
Dr. Steven T. Lacy's NPI number is 1225127897. It was assigned on October 12, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Steven T. Lacy?
Dr. Steven T. Lacy is an internist in Boston, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Steven T. Lacy practice?
Dr. Lacy practices at 300 Longwood Avenue, Boston, MA 02115. Dr. Lacy's primary practice is Boston Children's Hospital in Boston, Massachusetts, part of The Children's Hospital. Dmand AI also links Dr. Lacy to 1 community health center and 1 dialysis center.
What is Dr. Steven T. Lacy's office phone number?
The practice phone on file for Dr. Lacy is (617) 735-6000.
What is Dr. Steven T. Lacy's medical license number?
Dr. Lacy holds Massachusetts license 52901.
Which hospitals is Dr. Steven T. Lacy affiliated with?
Dr. Lacy practices at Boston Children's Hospital in Boston, Massachusetts.
What medical group is Dr. Steven T. Lacy part of?
Dr. Lacy is linked to Harbor Health.
Does Dr. Steven T. Lacy accept Medicare?
Yes. CMS data shows Dr. Lacy billed Medicare for 76 services in 2019, and Dr. Lacy accepts Medicare assignment.
What services does Dr. Steven T. Lacy bill to Medicare?
In 2019, Dr. Lacy's most billed Medicare services were lab and pathology test (82962) and lab and pathology test (83036).
What drugs does Dr. Steven T. Lacy prescribe most?
In 2024 Medicare Part D data, Dr. Lacy's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Omeprazole.
Show 3 more questionsShow fewer questions
Has Dr. Steven T. Lacy received payments from drug or device companies?
CMS Open Payments shows $19 in general payments to Dr. Lacy from 1 company from 2024 to 2024. The largest total came from Exact Sciences Corporation.
How long has Dr. Steven T. Lacy been practicing?
Dr. Lacy's NPI was assigned in 2006.
Does Dr. Steven T. Lacy do research?
Dmand AI links 1 publication to Dr. Lacy.
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