MARK D. KLAIMAN, M.D., L.C.
NPI 1225218506
Specialist in Bethesda, MD
About Mark D. Klaiman, M.d., L.c. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK D. KLAIMAN, M.D., L.C. (NPI 1225218506) is a healthcare organization registered as a specialist in Bethesda, Maryland and active in the NPI registry since November 2007. The organization lists Mark D Klaiman, Owner, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 2
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mark D. Klaiman, M.d., L.c. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by December 31, 2026
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
17Medicare enrollment records show 17 clinicians reassign Medicare billing to Mark D. Klaiman, M.D., L.C., which bills Medicare for the services they deliver. Of these, 2 practice at this address and 14 within 10 miles. They are listed nearest first.
Clinicians by Medicare Specialty 6
Clinicians, nearest first (17)
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Mark D. Klaiman, M.D., L.C.'s NPI number?
The NPI number for Mark D. Klaiman, M.D., L.C. is 1225218506. It was assigned to this organization in the NPPES registry on November 5, 2007.
Where is Mark D. Klaiman, M.D., L.C. located?
Mark D. Klaiman, M.D., L.C. is located at 6410 Rockledge Dr Suite 210, Bethesda, MD 20817. The listed phone number is (301) 493-8884.
What is Mark D. Klaiman, M.D., L.C.'s specialty?
The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.
Is Mark D. Klaiman, M.D., L.C. enrolled in Medicare?
Yes. Mark D. Klaiman, M.D., L.C. is registered in the Medicare PECOS enrollment system.
When is Mark D. Klaiman, M.D., L.C.'s Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (District of Columbia, Clinic/Group Practice) is due for revalidation by December 31, 2026. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Mark D. Klaiman, M.D., L.C.?
According to the CMS Revalidation Reassignment List (October 2026 release), 17 clinicians in 6 Medicare specialties reassign their Medicare billing to Mark D. Klaiman, M.D., L.C.. 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. The largest specialties are Physical Therapist in Private Practice (12), Emergency Medicine (1) and Neurology (1). Of these, 2 practice at this address and 14 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Mark D. Klaiman, M.D., L.C. was last updated on January 24, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Mark D. Klaiman, M.d., L.c. · NPI 1225218506
Specialist organization in Bethesda, Maryland. Organization record, active in the CMS NPPES registry since November 5, 2007.
## Identity
- **NPI:** 1225218506 (Entity type: Organization)
- **Enumerated:** November 5, 2007
- **Primary specialty:** Specialist · taxonomy 174400000X
- **Organization subpart:** No
- **Authorized official:** Mark Klaiman, OWNER
## Practice location
- **Address:** 6410 ROCKLEDGE DR, SUITE 210, Bethesda, MD 20817-1809
- **Phone:** (301) 493-8884 · **Fax:** (301) 493-8234
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** December 31, 2026 (Non-DME Part B, District of Columbia, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 17 clinicians in 6 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Physical Therapist in Private Practice (12), Emergency Medicine (1), Neurology (1); 2 practice at this address and 14 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 24, 2011
- **Other identifiers:** Medicare PIN G00971 (MD); Other 1881698488 (MD)
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Source: [NPI Profile](https://npiprofile.com/npi/1225218506) · Data from the CMS NPPES public registry.