Jacob Gilbert Gruber, MD
Emergency Medicine Physician · Milford, MA
Jacob Gilbert Gruber, MD is an emergency medicine physician with a practice address in Milford, Massachusetts, and NPI 1275108375, issued on May 21, 2021. Check the license (Massachusetts 1022414, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Jacob Gilbert Gruber
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 1022414 MA
Self-reported in NPPES; status is on the state search - Practice location
- 14 Prospect St, Milford, MA 01757
- Phone
- (508) 422-2240
- Enumerated
- May 21, 2021
- Record last updated
- Jun 30, 2026
- Medicare enrollment
- Enrolled (PECOS I20250715004121); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,829 in Massachusetts → Look up another NPI →
Also registered at 14 Prospect St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jacob Gilbert Gruber in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 1022414Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average emergency medicine physician in 2024
44 Medicare Part D claims for 37 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through 2 group practices
- Orion Emergency Services, Inc.Milford, MA
- Sturdy Memorial Hospital IncAttleboro, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jacob Gilbert Gruber among 1,829 emergency medicine physician records in Massachusetts
Jacob Gilbert Gruber, MD is one of 1,829 emergency medicine physician records with a practice address in Massachusetts. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2021 · median 2011 among the 1,200 with a school on file
- Record last updated2026 · 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 207P00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
19 emergency medicine physician records list a practice address in Milford
They are 19 of the 3,459 NPPES records with a practice address in Milford, and 1,829 emergency medicine physician records in Massachusetts.
All 1,829 in Massachusetts → Every provider in Milford → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Mary Burke, M.D.Milford, MA 017571972661668
- Vivek Chander, M.D.Milford, MA 017571770641524
- Joseph Currier, M.D.Milford, MA 017571255499026
- Karen Ann Defazio, M.D.Milford, MA 017571982641676
- Jon Hojnoski, M.D.Milford, MA 017571154311827
- Jeffrey Hopkins, M.D.Milford, MA 017571346308012
- Joshua Jarbeau, M.D.Milford, MA 017571184782021
- Julian Kadish, M.D.Milford, MA 017571295899946
Common questions
What is Jacob Gilbert Gruber, MD's NPI number?
Jacob Gilbert Gruber, MD's National Provider Identifier (NPI) is 1275108375, issued on May 21, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Jacob Gilbert Gruber, MD located?
The NPPES record lists a practice address at 14 Prospect St, Milford, MA, 01757. Phone: (508) 422-2240. Providers update this record themselves, so call before visiting.
How can I verify Jacob Gilbert Gruber, MD's license?
NPPES lists Massachusetts license number 1022414, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jacob Gilbert Gruber, MD prescribe under Medicare Part D?
In 2024, Jacob Gilbert Gruber, MD had 44 Medicare Part D claims for 37 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.