Dr. Lazaro V. Zayas Jr., MD
- Part D claims, 2024
- 85
- Hospital affiliations
- 1
- Industry payments
- $100
- Medical groups
- 3
- State license
- 1
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Zayas' 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. Lazaro V. Zayas Jr. is a psychiatrist in Boston, Massachusetts
Dr. Zayas practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Zayas' NPI, 1720215544, was assigned on June 19, 2009. Dr. Zayas holds Massachusetts license L-241199.
- NPI
- 1720215544NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3779742754
- NPI enumeration date
- June 19, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Lazaro V. Zayas Jr. practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Zayas' primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Lazaro V. Zayas Jr. is affiliated with 4 sites of care and 3 medical groups
Dr. Zayas' primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. The medical group on file is Massachusetts General Hospital. Dmand AI also links Dr. Zayas to 2 more group practices and clinics, 2 medical groups and 1 community health center, each named with a free account. Dr. Zayas' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Lazaro V. Zayas Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Zayas practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Mass General Brigham and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Lazaro V. Zayas Jr. is one of 1,857 psychiatrists in Massachusetts
Psychiatry is Dr. Zayas' primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Zayas is licensed in Massachusetts.
Specialties and state licenses
- Psychiatry, MassachusettsPrimary
Psychiatrists near Dr. Zayas
Counts of psychiatrists 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. Lazaro V. Zayas Jr.'s patients have a median age of 27
Across all payers, Dmand AI patient panel data puts Dr. Zayas' median patient age at 27, with 72% women.
Dr. Zayas' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 27
Patient panel by sex, all payers
- Women72%
- Men22%
Source: Dmand AI Patient Panel Data
Dr. Lazaro V. Zayas Jr. wrote 85 Medicare Part D claims in 2024
In 2024, Dr. Zayas wrote 85 Medicare Part D claims. 89% of them were for generic drugs. CMS names the drug for 18 of them, across 1 drug with 11 or more claims each, at $371 in total drug cost. In 2023, CMS named 16 claims across 1 drug.
Dr. Zayas' Part D claims by kind of drug, 2024
- Generic76 claims89%
- Brand-name and other9 claims11%
Dr. Zayas' 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: 162024: 1813%
Drugs named by CMS: 1 in 2024, 1 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
Dr. Lazaro V. Zayas Jr. offers telehealth to Medicare patients
Dr. Zayas accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Zayas as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Lazaro V. Zayas Jr. received $100 in industry payments in 2022
CMS Open Payments shows 1 general payment to Dr. Zayas from 1 drug or device company in 2022. Food and beverage make up the largest share, 100% of the total. ITI, Inc. paid the most, $100.
Companies that paid Dr. Zayas the most, 2022 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Lazaro V. Zayas Jr.'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 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) |
| 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. Lazaro V. Zayas Jr.
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. Lazaro V. Zayas Jr.'s NPI number?
Dr. Lazaro V. Zayas Jr.'s NPI number is 1720215544. It was assigned on June 19, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Lazaro V. Zayas Jr.?
Dr. Lazaro V. Zayas Jr. is a psychiatrist in Boston, Massachusetts. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Lazaro V. Zayas Jr. practice?
Dr. Zayas practices at 55 Fruit Street, Boston, MA 02114. Dr. Zayas' primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Zayas to 2 group practices and clinics, 2 medical groups and 1 community health center.
What is Dr. Lazaro V. Zayas Jr.'s office phone number?
The practice phone on file for Dr. Zayas is (617) 726-2000.
What is Dr. Lazaro V. Zayas Jr.'s medical license number?
Dr. Zayas holds Massachusetts license L-241199.
Which hospitals is Dr. Lazaro V. Zayas Jr. affiliated with?
Dr. Zayas practices at Massachusetts General Hospital in Boston, Massachusetts.
What medical group is Dr. Lazaro V. Zayas Jr. part of?
Dr. Zayas is linked to Massachusetts General Hospital. Dmand AI links Dr. Zayas to 2 more medical groups.
Does Dr. Lazaro V. Zayas Jr. accept Medicare?
Yes. CMS lists Dr. Zayas as accepting Medicare assignment.
Does Dr. Lazaro V. Zayas Jr. offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Zayas as offering telehealth services.
What drugs does Dr. Lazaro V. Zayas Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Zayas' most prescribed drugs by claims were Dextroamphetamine-Amphetamine.
Has Dr. Lazaro V. Zayas Jr. received payments from drug or device companies?
CMS Open Payments shows $100 in general payments to Dr. Zayas from 1 company from 2022 to 2022. The largest total came from ITI, Inc.
How long has Dr. Lazaro V. Zayas Jr. been practicing?
Dr. Zayas graduated from medical school in 2009, 17 years ago.
Selling to psychiatry practices?
See psychiatrists in Massachusetts by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card