Mark Geist
Social Worker · Boston, MA
Mark Geist is a social worker with a practice address in Boston, Massachusetts, and NPI 1558677427, issued on Aug 29, 2010. Check the license with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Geist
- Primary taxonomy
- Social Worker 104100000X
- Practice location
- 50 Redfield St Ste 300, Boston, MA 02122
- Phone
- (617) 288-7450
- Enumerated
- Aug 29, 2010
- Record last updated
- Jun 4, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20240228000173); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest social worker records → All 5,517 in Massachusetts → Look up another NPI →
Also registered at 50 Redfield St Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kayla AndersonCounselor1639603673
Verify Mark Geist in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Framingham Psychiatric Care LLCFramingham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Geist among 5,517 social worker records in Massachusetts
Mark Geist is one of 5,517 social worker records with a practice address in Massachusetts. 5% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 17% of them.
- NPI issued2010 · 17% of these records are older, 79% newer
- In a Medicare fileYes · 5% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated2011 · median 2012 among the 435 with a school on file
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 104100000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
463 social worker records list a practice address in Boston
They are 463 of the 41,865 NPPES records with a practice address in Boston, and 5,517 social worker records in Massachusetts.
All 5,517 in Massachusetts → Every provider in Boston → Social Worker nationwide →
The 8 social worker records with the nearest ZIP codes
- Julia Busbee, LCSWDorchester, MA 021221821367202
- Rachael Cooper, LCSWDorchester, MA 021221316216633
- Nancye Francois-CajusteDorchester, MA 021221164724761
- Kristen HerlihyDorchester, MA 021221073770491
- Jane LeeDorchester, MA 021221457660482
- Kathy Monteiro WilliamsDorchester, MA 021221710263751
- Diem Chau Nguyen, MSWDorchester, MA 021221104988179
- Shanna Person-JohnsonDorchester, MA 021221164781605
Common questions
What is Mark Geist's NPI number?
Mark Geist's National Provider Identifier (NPI) is 1558677427, issued on Aug 29, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mark Geist located?
The NPPES record lists a practice address at 50 Redfield St Ste 300, Boston, MA, 02122. Phone: (617) 288-7450. Providers update this record themselves, so call before visiting.
How can I verify Mark Geist's license?
Search the Massachusetts board that licenses this profession; the NPPES record confirms identity 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.