DR. JOHN SPECHT MADDOX MD
NPI 1528122256
Surgery - Trauma Surgery in Bethesda, MD

NPI Status: Active since December 20, 2006

Contact Information

WALTER REED NATIONAL MILITARY CTR
8901 WISCONSIN AVE
BETHESDA, MD
ZIP 20889
Phone: (301) 400-2201

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  • Individual
  • Male
  • Years of Experience 20
  • Surgery
  • Trauma Surgery
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About JOHN MADDOX

This page provides the complete NPI Profile along with additional information for John Maddox, a provider established in Bethesda, Maryland with a medical specialization in Surgery, focusing in trauma surgery and more than 20 years of experience. He graduated from Uniformed Services Uhs Fe Hebert School Of Med in 2006. The healthcare provider is registered in the NPI registry with number 1528122256 assigned on December 2006. The practitioner's primary taxonomy code is 2086S0127X with license number D0089752 (MD). The provider is registered as an individual and his NPI record was last updated May 2025.

NPI
1528122256
Provider Name
DR. JOHN SPECHT MADDOX MD
Gender
Male
Entity Type
Individual
Location Address
WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE BETHESDA, MD 20889
Location Phone
(301) 400-2201
Mailing Address
3823 RODMAN ST NW APT E23 WASHINGTON, DC 20016
Mailing Phone
(240) 506-6532
Medical School Name
UNIFORMED SERVICES UHS FE HEBERT SCHOOL OF MED
Graduation Year
2006
Is Sole Proprietor?
No
Enumeration Date
12-20-2006
Last Update Date
05-30-2025
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Location Map

Secondary Locations

  • 11116 Medical Campus Rd
    Hagerstown, MD 21742
    (301) 790-8000

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Surgery Trauma Surgery

Taxonomy Code
2086S0127X
Type
Allopathic & Osteopathic Physicians
License No.
D0089752
License State
MD
Taxonomy Description
Trauma surgery is a recognized subspecialty of general surgery. Trauma surgeons are physicians who have completed a five-year general surgery residency and usually continue with a one to two year fellowship in trauma and/or surgical critical care, typically leading to additional board certification in surgical critical care. There is no trauma surgery board certification at this point. To obtain board certification in surgical critical care, a fellowship in surgical critical care or anesthesiology critical care must be completed during or after general surgery residency.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1208600000XAllopathic & Osteopathic Physicians

Surgery

D0089752 (MD)
2390200000XStudent, Health Care

Student in an Organized Health Care Education/Training Program

 

Medicare Participation & PECOS Enrollment Status

John Maddox is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

John Maddox is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 1759529944

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20200812000129

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. John Maddox is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
UNIVERSITY OF MARYLAND MEDICAL CENTER22 SOUTH GREENE STREET
BALTIMORE, MD 21201
(410) 328-8667Acute Care Hospitals

Reviews for DR. JOHN SPECHT MADDOX MD

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NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1528122256
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
2548224210
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 5 + 4 + 8 + 2 + 2 + 4 + 2 + 1 + 0 + 24 = 54
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
60 - 54 = 66

The NPI number 1528122256 is valid because the calculated check digit 6 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 20 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1619969102DR. KIMON ARTHUR RUMANES D.D.S.
Individual
Dentist (General Practice)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE.
BETHESDA, MD 20889
(301) 295-4011
1649248329 ADAM WILSON ARMSTRONG DO
Individual
Internal Medicine (Infectious Disease)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE
BETHESDA, MD 20889
(301) 295-6400
1700831336MS. WENDY HOPE GILES PT,DPT
Individual
Physical TherapistWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE
BETHESDA, MD 20889
(301) 295-2883
1235249319MRS. ABBY FRISS ROGERS C.R.N.P.
Individual
Registered Nurse (Women's Health Care, Ambulatory)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
(301) 295-4394
1982796082 ALIZA LEVINE MD
Individual
Internal MedicineWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
(301) 319-4712
1366502809 LILIAN HOPE FARRIOR CNM
Individual
Advanced Practice MidwifeWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
(301) 295-4394
1285790774MS. MICHELE JACQUELYNE KIRBY MSW
Individual
Social Worker (Clinical)WALTER REED NATIONAL MILITARY CTR 8901 WISCONCIN AVENUE
BETHESDA, MD 20889
(301) 295-1719
1295883932MS. NANCY MEYERS NP
Individual
Nurse Practitioner (Adult Health)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE
BETHESDA, MD 20889
(301) 295-0196
1801938238DR. KELLI JEAN BANKARD PHARM.D.
Individual
PharmacistWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
(301) 295-2121
1841419231DR. NATHANIEL JOLO ROBERTS PHARM.D.
Individual
Pharmacist (Pharmacotherapy)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE
BETHESDA, MD 20889
(301) 400-2735
1821291444MRS. TRUC MAI T PHELPS PHARMACIST (RPH)
Individual
PharmacistWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE
BETHESDA, MD 20889
(301) 319-3434
1770752586DR. JASON LEE RIHA PHARMD
Individual
PharmacistWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
(719) 640-6307
1073871307DR. TIMOTHY L LOZON D.D.S.
Individual
Dentist (General Practice)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE BLDG 2 ROOM 2661
BETHESDA, MD 20889
(301) 295-4059
1154508810MS. LENORA CHRISTINE FREEMAN LICSW/LCSW-C
Individual
Social Worker (Clinical)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
(301) 295-7623
1821017039DR. MARY THERESA CORD AU.D.
Individual
AudiologistWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE
BETHESDA, MD 20889
(301) 319-7041
1811051097 KATIE KIRKPATRICK MS, RD, LDN
Individual
Dietitian, RegisteredWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
(301) 295-4454
1477756237MISS CHRISTINA MARIE SMITH LCSW-C
Individual
Social Worker (Clinical)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE BLDG 62 RM 3055
BETHESDA, MD 20889
(301) 400-0414
1376514547DR. ROBERT E. BRUTCHER PHARM D, PHD
Individual
PharmacistWALTER REED NATIONAL MILITARY CTR DEPARTMENT OF PHARMACY
BETHESDA, MD 20889
(301) 295-2113
1174788731DR. REBECCA LYNNE WARD PHARMD
Individual
PharmacistWALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVENUE
BETHESDA, MD 20889
(301) 319-4422
1417983008DR. HARJINDER KUMAR M.D.
Individual
Internal Medicine (Geriatric Medicine)WALTER REED NATIONAL MILITARY CTR 8901 WISCONSIN AVE
BETHESDA, MD 20889
(301) 400-2838

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1528122256, enumerated in the NPI registry as an "individual" on December 20, 2006

The provider is located at Walter Reed National Military Ctr 8901 Wisconsin Ave Bethesda, Md 20889 and the phone number is (301) 400-2201

The provider's speciality is Surgery with taxonomy code 2086S0127X with a focus in Trauma Surgery

The provider has more than 20 years of experience. He graduated from Uniformed Services Uhs Fe Hebert School Of Med in 2006.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

The practitioner is affiliated to the following hospital(s): UNIVERSITY OF MARYLAND MEDICAL CENTER. Hospital affiliations are identified through self-reporting data and service claims based on the place of service.

This NPI record was last updated on December 20, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.