ADAM KLEIN DO
NPI 1245686641
Internal Medicine - Infectious Disease in Bethesda, MD
About Adam Klein Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ADAM KLEIN DO (NPI 1245686641) is an individual infectious disease provider in Bethesda, Maryland, licensed in Maryland (H0097291) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, is affiliated with Suburban Hospital, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
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
Adam Klein Do 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 Reassignments
3Medicare enrollment records show Adam Klein reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Washington, DC 20007
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Also billed through NPI 1376887844 (Maryland)
- 3,530 clinicians in this Medicare group
Washington, DC 20010
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Medicare enrollment name: Whc Physician Group LLC
- Also billed through NPI 1700154226 (Maryland)
- 613 clinicians in this Medicare group
Tysons, VA 22102
- Reassigned Medicare billing, District of Columbia and Maryland enrollments
- Also billed through NPI 1689485963 (Maryland)
- 691 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.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Suburban Hospital
Acute Care Hospitals · Bethesda, MDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 20814 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
BETHESDA, MD 20814
BETHESDA, MD 20814
BETHESDA, MD 20814
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 Adam Klein's NPI number?
The NPI number for Adam Klein is 1245686641. It was assigned to this individual provider in the NPPES registry on May 4, 2016.
Where is Adam Klein located?
Adam Klein practices at 8600 Old Georgetown Rd, Bethesda, MD 20814. The listed phone number is (301) 896-7500.
What is Adam Klein's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Adam Klein enrolled in Medicare?
Yes. Adam Klein 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 organizations bill Medicare for Adam Klein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Adam Klein reassigns Medicare benefits to 3 organizations: Medstar Medical Group II LLC (Washington, DC), Whc Emerg Phys (Washington, DC) and Johns Hopkins Community Physicians, Inc (Tysons, VA). Each 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 Adam Klein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Adam Klein affiliated with any hospitals?
According to CMS data, Adam Klein is affiliated with Suburban Hospital.
When was this NPI record last updated?
The NPPES record for Adam Klein was last updated on October 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.
# Adam Klein, DO · NPI 1245686641
Infectious Disease physician in Bethesda, Maryland. Individual provider, active in the CMS NPPES registry since May 4, 2016.
## Identity
- **NPI:** 1245686641 (Entity type: Individual)
- **Enumerated:** May 4, 2016
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** H0097291 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 8600 OLD GEORGETOWN RD, Bethesda, MD 20814-1422
- **Phone:** (301) 896-7500
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Medstar Medical Group II LLC (NPI 1205562816, Washington, DC); Whc Emerg Phys (NPI 1306260625, Washington, DC); Johns Hopkins Community Physicians, Inc (NPI 1790631695, Tysons, VA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** October 3, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1245686641) · Data from the CMS NPPES public registry.