HOLTZMAN MEDICAL GROUP, LLC
NPI 1184145955
Internal Medicine in Brookline, MA
About Holtzman Medical Group, Llc NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
HOLTZMAN MEDICAL GROUP, LLC (NPI 1184145955) is a healthcare organization registered as an internal medicine in Brookline, Massachusetts and active in the NPI registry since July 2017. The organization holds 2 active CLIA laboratory certificates, maintains a secondary practice location in Weymouth, and lists Justin Seth Holtzman, Medical Director, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Holtzman Medical Group, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
8Medicare enrollment records show 8 clinicians reassign Medicare billing to Holtzman Medical Group, LLC, which bills Medicare for the services they deliver. Of these, 4 practice at this address and 6 within 10 miles. They are listed nearest first.
Clinicians, nearest first (8)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA 2
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 22D2247188
Holtzman Medical Group, LLC · Brookline, MACertificate of Waiver 22D2340810
Holtzman Medical Urgent Care LLC · Brookline, MAFrequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Holtzman Medical Group, LLC's NPI number?
The NPI number for Holtzman Medical Group, LLC is 1184145955. It was assigned to this organization in the NPPES registry on July 3, 2017.
Where is Holtzman Medical Group, LLC located?
Holtzman Medical Group, LLC is located at 1180 Beacon St Ste 6B, Brookline, MA 02446. The listed phone number is (781) 770-4064.
What is Holtzman Medical Group, LLC's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Holtzman Medical Group, LLC enrolled in Medicare?
Yes. Holtzman Medical Group, LLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Holtzman Medical Group, LLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 8 clinicians reassign their Medicare billing to Holtzman Medical Group, LLC, in Family Practice, Gastroenterology, Hospitalist, Internal Medicine, Nurse Practitioner and 1 other specialty. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Of these, 4 practice at this address and 6 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Holtzman Medical Group, LLC hold CLIA laboratory certificates?
Yes. 2 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.
What insurance does Holtzman Medical Group, LLC accept?
Health plans from Anthem Blue Cross and Blue Shield list Holtzman Medical Group, LLC as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Holtzman Medical Group, LLC was last updated on October 11, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Holtzman Medical Group, Llc · NPI 1184145955
Internal Medicine organization in Brookline, Massachusetts. Organization record, active in the CMS NPPES registry since July 3, 2017.
## Identity
- **NPI:** 1184145955 (Entity type: Organization)
- **Enumerated:** July 3, 2017
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Organization subpart:** No
- **Authorized official:** Justin Holtzman, MEDICAL DIRECTOR
## Practice location
- **Address:** 1180 BEACON ST STE 6B, Brookline, MA 02446-3806
- **Phone:** (781) 770-4064 · **Fax:** (781) 682-6157
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 8 clinicians in 6 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Hospitalist (2), Nurse Practitioner (2), Family Practice (1); 4 practice at this address and 6 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 11, 2020
- **CLIA laboratory certificates:** 2 on file
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Source: [NPI Profile](https://npiprofile.com/npi/1184145955) · Data from the CMS NPPES public registry.