Lawrence David Mass, M.D.
Addiction Medicine (Internal Medicine) Physician · New York, NY
Lawrence David Mass, M.D. is an addiction medicine (internal medicine) physician with a practice address in New York, New York, and NPI 1609090349, issued on Apr 12, 2007. Check the license (New York 127475, as entered in NPPES) on the NYS Education Department, Office of the Professions; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Lawrence David Mass
- Credential
- M.D.
- Primary taxonomy
- Addiction Medicine (Internal Medicine) Physician 207RA0401X
- License number
- 127475 NY
Self-reported in NPPES; status is on the state search - Practice location
- 435 2ND Ave, New York, NY 10010
- Phone
- (212) 726-6823
- Enumerated
- Apr 12, 2007
- Record last updated
- Dec 3, 2012 (not updated in 14 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest addiction medicine (internal medicine) physician records → All 68 in New York → Look up another NPI →
Also registered at 435 2ND Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karl Miller, PHYSICIAN ASSISTANTMedical Physician Assistant1851542658
Verify Lawrence David Mass in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 127475Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Lawrence David Mass among 68 addiction medicine (internal medicine) physician records in New York
Lawrence David Mass, M.D. is one of 68 addiction medicine (internal medicine) physician records with a practice address in New York. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 43% of them.
- NPI issued2007 · 43% of these records are older, 43% newer
- In a Medicare fileNo · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 41% of these records are
- Record last updated2012 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RA0401X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Addiction Medicine (Internal Medicine) Physician providers in New York
There are 68 addiction medicine (internal medicine) physician records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 68 in New York → Every provider in New York → Addiction Medicine (Internal Medicine) Physician nationwide →
The 8 addiction medicine (internal medicine) physician records with the nearest ZIP codes
- Felicitas Amador, M.D.New York, NY 100101124031265
- Pamela Mund, MDNew York, NY 100111144313362
- Hannah Beaman, MDNew York, NY 100161447991336
- Joshua Lee, MDNew York, NY 100161114132701
- Taiye Odedosu, M.DNew York, NY 100161356415970
- Soteri Polydorou, M.D.New York, NY 100161194866061
- Meaghan Young, MDNew York, NY 100161043839392
- Alina Babar, MDNew York, NY 100031912497025
Common questions
What is Lawrence David Mass, M.D.'s NPI number?
Lawrence David Mass, M.D.'s National Provider Identifier (NPI) is 1609090349, issued on Apr 12, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Lawrence David Mass, M.D. located?
The NPPES record lists a practice address at 435 2ND Ave, New York, NY, 10010. Phone: (212) 726-6823. Providers update this record themselves, so call before visiting.
How can I verify Lawrence David Mass, M.D.'s license?
NPPES lists New York license number 127475, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.