DR. LAWRENCE I KARLIN MD
NPI 1235186263
Orthopaedic Surgery - Pediatric Orthopaedic Surgery in Boston, MA
About Dr. Lawrence I Karlin Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LAWRENCE I KARLIN MD (NPI 1235186263) is an individual pediatric orthopaedic surgery provider in Boston, Massachusetts, licensed in Massachusetts (37934) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS and is a graduate of Tufts University School Of Medicine (1971).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Lawrence I Karlin Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Lawrence Karlin reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02115
- Reassigned Medicare billing, Massachusetts enrollment
- 98 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BOSTON, MA 02115
BOSTON, MA 02115
BOSTON, MA 02115
Frequently 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 Lawrence Karlin's NPI number?
The NPI number for Lawrence Karlin is 1235186263. It was assigned to this individual provider in the NPPES registry on May 27, 2006.
Where is Lawrence Karlin located?
Lawrence Karlin practices at 300 Longwood Ave, Boston, MA 02115. The listed phone number is (617) 355-6021.
What is Lawrence Karlin's specialty?
The primary specialty registered for this NPI is Orthopaedic Surgery, specializing in Pediatric Orthopaedic Surgery, with taxonomy code 207XP3100X.
Is Lawrence Karlin enrolled in Medicare?
Yes. Lawrence Karlin is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Lawrence Karlin's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lawrence Karlin reassigns Medicare benefits to Children's Orthopaedic Surgery Foundation, Inc. (Boston, MA). The 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 Lawrence Karlin's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Lawrence Karlin accept?
Health plans from Taro Health list Lawrence Karlin 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 Lawrence Karlin was last updated on October 10, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Dr. Lawrence I Karlin, MD · NPI 1235186263
Pediatric Orthopaedic Surgery physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 27, 2006.
## Identity
- **NPI:** 1235186263 (Entity type: Individual)
- **Enumerated:** May 27, 2006
- **Primary specialty:** Orthopaedic Surgery - Pediatric Orthopaedic Surgery · taxonomy 207XP3100X
- **State license:** 37934 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 LONGWOOD AVE, Boston, MA 02115-5724
- **Phone:** (617) 355-6021 · **Fax:** (617) 730-0456
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Children's Orthopaedic Surgery Foundation, Inc. (NPI 1548344393, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 1971
## Record status
- **NPPES last updated:** October 10, 2012
- **Other identifiers:** Medicare UPIN A36816; Medicare ID-Type Unspecified B53103; Medicaid 2073366 (MA)
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Source: [NPI Profile](https://npiprofile.com/npi/1235186263) · Data from the CMS NPPES public registry.