JOHN FREDERICK DEEKEN MD
NPI 1659390755
Internal Medicine - Medical Oncology in Fairfax, VA

Active since July 19, 2006PECOS EnrolledAccepts Medicare Assignment
81.28/100
CMS Quality Rating
8081 INNOVATION PARK DR, FAIRFAX, VA 22031(571) 472-4724(571) 472-0241 Get Directions Write a Review

NPPES record last updated: February 25, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Feb 25, 2022, Oct 16, 2020 (2 updates tracked since 2020).

About John Frederick Deeken Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN FREDERICK DEEKEN MD (NPI 1659390755) is an individual medical oncology provider in Fairfax, Virginia, licensed in Virginia (0101235487) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Inova Alexandria Hospital, and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1659390755
Entity TypeIndividualMale
Primary Taxonomy207RX0202X
Provider Legal NameJOHN FREDERICK DEEKENCredential: MD
Location Address8081 INNOVATION PARK DRFairfax, VA 22031-4867
Mailing AddressPo Box 37174Baltimore, MD 21297-3174 · (571) 423-5699 · Fax (571) 423-5698
Fax(571) 472-0241
Sole ProprietorNo
Medical School CMSGeorgetown University School Of MedicineGraduated 2001
Enumeration DateJuly 19, 2006
Last NPPES UpdateFebruary 25, 20222 updates tracked since enumeration
NPPES CertifiedFebruary 25, 2022
NPI 1659390755 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyInternal Medicine · Medical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RX0202X
License Licensed in VA · 0101235487
Definition
An internist who specializes in the diagnosis and treatment of all types of cancer and other benign and malignant tumors. This specialist decides on and administers therapy for these malignancies as well as consults with surgeons and radiotherapists on other treatments for cancer.
Also ListedInternal Medicine · Hematology & OncologyTaxonomy 207RH0003X · License 036169 (DC)
8081 INNOVATION PARK DR, Fairfax, VA 22031

Secondary Practice Locations 2

Location 13800 Reservoir Rd NWWashington, DC 20007-2113 · Phone (202) 444-2198
Location 23300 Gallows RdFalls Church, VA 22042-3307 · Phone (703) 776-4001 · Fax (703) 776-7113

Other Identifiers 1

OtherP00752503DC · Railroad Medicare

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

John Frederick Deeken 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.

PECOS PAC ID3678579554
PECOS Enrollment IDI20220405000259
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
82 services43 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
49 services40 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Inova Alexandria Hospital

Acute Care Hospitals · Alexandria, VA
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490040
Location4320 Seminary RdAlexandria, VA 22304 · Alexandria City County
Emergency services Birthing friendly

Inova Fairfax Hospital

Acute Care Hospitals · Falls Church, VA
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number490063
Location3300 Gallows RoadFalls Church, VA 22042 · Fairfax County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 22031 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$194.86 typical visit price
range $65.18 – $194.86
Typical copayment $48.71 (range $16.29 – $48.71)
Most-billed visit code 99205
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

81.28/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality70.77
Promoting Interoperability100
Improvement Activities40
Cost66.84

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.

Internal Medicine (Medical Oncology)
8081 INNOVATION PARK DR
FAIRFAX, VA 22031
Internal Medicine (Medical Oncology)
8081 INNOVATION PARK DR
FAIRFAX, VA 22031
Radiology (Radiation Oncology)
8081 INNOVATION PARK DR
FAIRFAX, VA 22031
Internal Medicine (Medical Oncology)
8081 INNOVATION PARK DR
FAIRFAX, VA 22031
Physician Assistant
8081 INNOVATION PARK DR
FAIRFAX, VA 22031
Internal Medicine
8081 INNOVATION PARK DR
FAIRFAX, VA 22031
Dietitian, Registered
8081 INNOVATION PARK DR
FAIRFAX, VA 22031
Internal Medicine (Medical Oncology)
8081 INNOVATION PARK DR
FAIRFAX, VA 22031

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 Deeken's NPI number?

The NPI number for John Deeken is 1659390755. It was assigned to this individual provider in the NPPES registry on July 19, 2006.

Where is John Deeken located?

John Deeken practices at 8081 Innovation Park Dr, Fairfax, VA 22031. The listed phone number is (571) 472-4724.

What is John Deeken's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.

Is John Deeken enrolled in Medicare?

Yes. John Deeken 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.

Is John Deeken affiliated with any hospitals?

According to CMS data, John Deeken is affiliated with Inova Alexandria Hospital and Inova Fairfax Hospital.

When was this NPI record last updated?

The NPPES record for John Deeken was last updated on February 25, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.