DR. JOHN SPECHT MADDOX MD
NPI 1528122256
Surgery - Trauma Surgery in Bethesda, MD
About Dr. John Specht Maddox Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JOHN SPECHT MADDOX MD (NPI 1528122256) is an individual trauma surgery provider in Bethesda, Maryland, licensed in Maryland (D0089752) and active in the NPI registry since December 2006. He is enrolled in Medicare PECOS, is affiliated with Meritus Medical Center, and maintains a secondary practice location in Hagerstown.
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 1
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. John Specht Maddox 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 Reassignments
4Medicare enrollment records show John Maddox reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Laurel, MD 20707
- Reassigned Medicare billing, District of Columbia enrollment
- 328 clinicians in this Medicare group
Baltimore, MD 21201
- Reassigned Medicare billing, Maryland enrollment
- Medicare enrollment name: Shock Trauma Associates PA
- 541 clinicians in this Medicare group
Hagerstown, MD 21742
- Reassigned Medicare billing, Maryland enrollment
- 311 clinicians in this Medicare group
Hagerstown, MD 21742
- Reassigned Medicare billing, Maryland enrollment
- 242 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Meritus Medical Center
Acute Care Hospitals · Hagerstown, MDUniversity Of Maryland Medical Center
Acute Care Hospitals · Baltimore, MDOther 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 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
BETHESDA, MD 20889
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 John Maddox's NPI number?
The NPI number for John Maddox is 1528122256. It was assigned to this individual provider in the NPPES registry on December 20, 2006.
Where is John Maddox located?
John Maddox practices at Walter Reed National Military Ctr 8901 Wisconsin Ave, Bethesda, MD 20889. The listed phone number is (301) 400-2201.
What is John Maddox's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Trauma Surgery, with taxonomy code 2086S0127X.
Is John Maddox enrolled in Medicare?
Yes. John Maddox 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 John Maddox's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Maddox reassigns Medicare benefits to 4 organizations: Dimensions Healthcare Associates Inc (Laurel, MD), Shock Trauma Associates, P.A. (Baltimore, MD), Meritus Medical Center Inc (Hagerstown, MD) and Medical Practices Of Antietam, LLC (Hagerstown, MD). 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 John Maddox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is John Maddox affiliated with any hospitals?
According to CMS data, John Maddox is affiliated with Meritus Medical Center and University Of Maryland Medical Center.
When was this NPI record last updated?
The NPPES record for John Maddox was last updated on May 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Dr. John Specht Maddox, MD · NPI 1528122256
Trauma Surgery physician in Bethesda, Maryland. Individual provider, active in the CMS NPPES registry since December 20, 2006.
## Identity
- **NPI:** 1528122256 (Entity type: Individual)
- **Enumerated:** December 20, 2006
- **Primary specialty:** Surgery - Trauma Surgery · taxonomy 2086S0127X
- **State license:** D0089752 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** WALTER REED NATIONAL MILITARY CTR, 8901 WISCONSIN AVE, Bethesda, MD 20889-0001
- **Phone:** (301) 400-2201
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Dimensions Healthcare Associates Inc (NPI 1407916646, Laurel, MD); Shock Trauma Associates, P.A. (NPI 1679512909, Baltimore, MD); Meritus Medical Center Inc (NPI 1255199246, Hagerstown, MD); Medical Practices Of Antietam, LLC (NPI 1558430843, Hagerstown, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Uniformed Services Uhs Fe Hebert School Of Med, class of 2006
## Record status
- **NPPES last updated:** May 30, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1528122256) · Data from the CMS NPPES public registry.