Mary Lam, NP
Family Nurse Practitioner · Chestnut Hill, MA
Mary Lam, NP is a family nurse practitioner with a practice address in Chestnut Hill, Massachusetts, and NPI 1699373076, issued on Oct 16, 2020. Check the license (Massachusetts RN2318841, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Lam
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- RN2318841 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1244 Boylston St, Chestnut Hill, MA 02467
- Phone
- (617) 383-6800
- Enumerated
- Oct 16, 2020
- Record last updated
- Nov 7, 2022
- Fax
- (617) 383-6801
- Medicare enrollment
- Enrolled (PECOS I20210426000715); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →
Also registered at 1244 Boylston St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary Lam in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2318841Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average family nurse practitioner in 2024
590 Medicare Part D claims for 245 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluticasone Propionate173 claims
- Ipratropium Bromide88 claims
- Azelastine Hcl66 claims
- Omeprazole50 claims
- Famotidine36 claims
- Mupirocin26 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $24.66
1 payment: food and beverage; the largest payer was Optinose US, Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- New England Ear Nose And Throat/facial Plastic Surgery PCNorth Andover, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary Lam among 4,724 family nurse practitioner records in Massachusetts
Mary Lam, NP is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 60% of them.
- NPI issued2020 · 60% of these records are older, 33% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2020 · median 2019 among the 2,704 with a school on file
- Record last updated2022 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 family nurse practitioner records list a practice address in Chestnut Hill
They are 23 of the 772 NPPES records with a practice address in Chestnut Hill, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in Chestnut Hill → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Shelly Bazes, NPChestnut Hill, MA 024671295889913
- Erin Caulfield Foley, NP-CChestnut Hill, MA 024671295233500
- Barbara Donnelly, NPChestnut Hill, MA 024671760451108
- Elaine Dors, NPChestnut Hill, MA 024671619940236
- Deborah Flint, FNPChestnut Hill, MA 024671578637922
- Colleen Gaffney, APRN-BCChestnut Hill, MA 024671649780438
- Jonathan Gerbode-GrantChestnut Hill, MA 024671780174086
- Diana Gertsch, RN, BSN, MSN, FNP-BCChestnut Hill, MA 024671033655071
Common questions
What is Mary Lam, NP's NPI number?
Mary Lam, NP's National Provider Identifier (NPI) is 1699373076, issued on Oct 16, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mary Lam, NP located?
The NPPES record lists a practice address at 1244 Boylston St, Chestnut Hill, MA, 02467. Phone: (617) 383-6800. Providers update this record themselves, so call before visiting.
How can I verify Mary Lam, NP's license?
NPPES lists Massachusetts license number RN2318841, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Lam, NP prescribe under Medicare Part D?
In 2024, Mary Lam, NP had 590 Medicare Part D claims for 245 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. 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.